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Perithecia Stock Photos and Images
RM2ANC2YH–A text-book of mycology and plant pathology . r, it may be pale,sprightly colored, or colorless, neverblack. Hypomyces with sprightlycolored perithecia arises from a thickcrust-like stroma. It lives parasitic-ally on a number of dififerent fleshyfungi. For example, Hypomyceslactifluonim transforms a species ofLactarius into a cinnabarred growthroughly resembling a toadstool andwithout gills, while the original colorof the host is completely lost in thehigher color produced by the parasite.Nectria without stroma has its peri-thecia developed on the surface of thesubstratum. N. cinnabarina is a
RMPG15NK–. Chestnut blight. Chestnut blight; Chestnut. Bui. 380, U. S. Depf. of Agriculturi Plate XV.. ENDOTHIA PARASITICA. VERTICAL SECTIONS OF STROMATA. X 49. Fig. 1 .—Showing a Young, Simple Pycnidial Cavity at the Base. Fig. 2.—In Which Neither Pycnidia Nor Perithecia Have Begun to Develop. Fig. 3.—With Irregular Chambered Pycnidia. All the above aie about the same age—four moulh.s after iuoculatiou.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble
RMMCKCE6–. Fig. 70.—Cuciirbilariii lahiiini. i, branches showing the fungus ; 2, stroma in section, with perithecia; 3, ascus containing spores; 4, free spores. Fig. i nat. size ; remainder highly mag. cylindrical, 8-sporcd, spores elongated, muriform, coloured ; paraphyses numerous. Silver fir canker.Dr. Cavara has described in detail ;i disease of Ahies pcctinata caused by Cucurhitaria pithyophila (De Not., var. ceml>rae, Rehm.). Trees are attacked up to the age of sixty years, but younger trees are most susceptible.
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 4o6 DISEASES OF CULTIVATED PLANTS SPHAEROPSIDIACEAE * Spores continuous PHOMA (Fries.) Perithecia subcutaneous then erumpent, globose or com- pressed, not beaked, mouth minute, conidia hyaline, continu- ous, elliptical to subglobose. A numerous genus, the species forming crowds of black microscopic dots on stems and leaves. Gooseberry shoot spot.—Numerous minute black dots nestling in the epidermis of gooseberry shoots, more especially Fic. 126.— I, Phyllostula violac on viol Stock Photo](https://c8.alamy.com/comp/T1HX00/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-4o6-diseases-of-cultivated-plants-sphaeropsidiaceae-spores-continuous-phoma-fries-perithecia-subcutaneous-then-erumpent-globose-or-com-pressed-not-beaked-mouth-minute-conidia-hyaline-continu-ous-elliptical-to-subglobose-a-numerous-genus-the-species-forming-crowds-of-black-microscopic-dots-on-stems-and-leaves-gooseberry-shoot-spotnumerous-minute-black-dots-nestling-in-the-epidermis-of-gooseberry-shoots-more-especially-fic-126-i-phyllostula-violac-on-viol-T1HX00.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 4o6 DISEASES OF CULTIVATED PLANTS SPHAEROPSIDIACEAE * Spores continuous PHOMA (Fries.) Perithecia subcutaneous then erumpent, globose or com- pressed, not beaked, mouth minute, conidia hyaline, continu- ous, elliptical to subglobose. A numerous genus, the species forming crowds of black microscopic dots on stems and leaves. Gooseberry shoot spot.—Numerous minute black dots nestling in the epidermis of gooseberry shoots, more especially Fic. 126.— I, Phyllostula violac on viol Stock Photo")
RMT1HX00–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] 4o6 DISEASES OF CULTIVATED PLANTS SPHAEROPSIDIACEAE * Spores continuous PHOMA (Fries.) Perithecia subcutaneous then erumpent, globose or com- pressed, not beaked, mouth minute, conidia hyaline, continu- ous, elliptical to subglobose. A numerous genus, the species forming crowds of black microscopic dots on stems and leaves. Gooseberry shoot spot.—Numerous minute black dots nestling in the epidermis of gooseberry shoots, more especially Fic. 126.— I, Phyllostula violac on viol
RM2AKB64X–Memoirs . COCKATNE BOSTON THAXTER.--LABOULBENIACEAE MEMOIRS AMERICAN ACADEMY. VOL. XIV. N9 5. F III.. THAXTER - -lABOULBENIACEAE MONOGRAPH OF THE LABOULBENIACE.E. 417 DESCRIPTION OF PLATE III. Dimeromyces anomalus Thaxter. Figs. 61 and 62. Two females, the appendages partly broken. Fig. 63. Furcate male, the appendage also producing antheridia: water im , oc. 4. Dimeromyces adventitiosus Thaxter. Fig. 64. Female individual with two young perithecia developing at right from undifferentiated primaryappendage. Fig. 65. Female individual, showing development of a perithecium near the tip of the pr
![. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 231 Perithecia were found by Viala»" and by Prillieux»" on old wood, long dead from such attack. These belong to the genus Rosellinia and are believed to present the ascigerous form of Dema- tophora necatrix. Similar claims of relationship of this fungus to several other genera have been made and its actual position cannot be consid- ered as established with certainty. R. massinkii Sacc. Perithecia sparse, globose or depressed, carbonous, 165 fi; asci cyhndric, 54 x 8 At; spores dark-br Stock Photo](https://c8.alamy.com/comp/PG4G6J/the-fungi-which-cause-plant-disease-plant-diseases-fungi-the-fungi-which-cause-plant-disease-231-perithecia-were-found-by-vialaquot-and-by-prillieuxquot-on-old-wood-long-dead-from-such-attack-these-belong-to-the-genus-rosellinia-and-are-believed-to-present-the-ascigerous-form-of-dema-tophora-necatrix-similar-claims-of-relationship-of-this-fungus-to-several-other-genera-have-been-made-and-its-actual-position-cannot-be-consid-ered-as-established-with-certainty-r-massinkii-sacc-perithecia-sparse-globose-or-depressed-carbonous-165-fi-asci-cyhndric-54-x-8-at-spores-dark-br-PG4G6J.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 231 Perithecia were found by Viala»" and by Prillieux»" on old wood, long dead from such attack. These belong to the genus Rosellinia and are believed to present the ascigerous form of Dema- tophora necatrix. Similar claims of relationship of this fungus to several other genera have been made and its actual position cannot be consid- ered as established with certainty. R. massinkii Sacc. Perithecia sparse, globose or depressed, carbonous, 165 fi; asci cyhndric, 54 x 8 At; spores dark-br Stock Photo")
RMPG4G6J–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 231 Perithecia were found by Viala»" and by Prillieux»" on old wood, long dead from such attack. These belong to the genus Rosellinia and are believed to present the ascigerous form of Dema- tophora necatrix. Similar claims of relationship of this fungus to several other genera have been made and its actual position cannot be consid- ered as established with certainty. R. massinkii Sacc. Perithecia sparse, globose or depressed, carbonous, 165 fi; asci cyhndric, 54 x 8 At; spores dark-br
![. ^ Smith {Diseases of field and garden crops. 1884. p. 233) describes and figures Claviceps purpm'ea var. Wilsoni on Glyceria fluitans near Aberdeen. It is distinguished " in being whitish or yellowisli, instead of being pale purple in colour, and in the perithecia or conceptacles being almost free on an elongated club-like growth instead of being immersed in a globular head or stroma." -Hartwich, " Sclerote du Molinia coerulea." Bullet, de la Soc. iMycolog. de France. 1895. Stock Photo](https://c8.alamy.com/comp/MCK5J9/smith-diseases-of-field-and-garden-crops-1884-p-233-describes-and-figures-claviceps-purpmea-var-wilsoni-on-glyceria-fluitans-near-aberdeen-it-is-distinguished-quot-in-being-whitish-or-yellowisli-instead-of-being-pale-purple-in-colour-and-in-the-perithecia-or-conceptacles-being-almost-free-on-an-elongated-club-like-growth-instead-of-being-immersed-in-a-globular-head-or-stromaquot-hartwich-quot-sclerote-du-molinia-coeruleaquot-bullet-de-la-soc-imycolog-de-france-1895-MCK5J9.jpg ". ^ Smith {Diseases of field and garden crops. 1884. p. 233) describes and figures Claviceps purpm'ea var. Wilsoni on Glyceria fluitans near Aberdeen. It is distinguished " in being whitish or yellowisli, instead of being pale purple in colour, and in the perithecia or conceptacles being almost free on an elongated club-like growth instead of being immersed in a globular head or stroma." -Hartwich, " Sclerote du Molinia coerulea." Bullet, de la Soc. iMycolog. de France. 1895. Stock Photo")
RMMCK5J9–. ^ Smith {Diseases of field and garden crops. 1884. p. 233) describes and figures Claviceps purpm'ea var. Wilsoni on Glyceria fluitans near Aberdeen. It is distinguished " in being whitish or yellowisli, instead of being pale purple in colour, and in the perithecia or conceptacles being almost free on an elongated club-like growth instead of being immersed in a globular head or stroma." -Hartwich, " Sclerote du Molinia coerulea." Bullet, de la Soc. iMycolog. de France. 1895.
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PHOMA 409 Phoma solani (Halsted) causes a 'damping off' of egg- plants. The disease attacks the seedHngs at the base of the stem, the fruit of the fungus appearing as exceedingly minute dots on the diseased part. Halsted, New Jersey Agric. Exp. Sta. Rep., 1891. Fig. 127.—Phoma sanguinolenta. i, diseased carrot; 2, diseased carrot flowering stem ; 3, portion of a diseased spot showing perithecia with the conidia escaping as a viscid tendril ; 4, section of a perithecium with t Stock Photo](https://c8.alamy.com/comp/T1HX34/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-phoma-409-phoma-solani-halsted-causes-a-damping-off-of-egg-plants-the-disease-attacks-the-seedhngs-at-the-base-of-the-stem-the-fruit-of-the-fungus-appearing-as-exceedingly-minute-dots-on-the-diseased-part-halsted-new-jersey-agric-exp-sta-rep-1891-fig-127phoma-sanguinolenta-i-diseased-carrot-2-diseased-carrot-flowering-stem-3-portion-of-a-diseased-spot-showing-perithecia-with-the-conidia-escaping-as-a-viscid-tendril-4-section-of-a-perithecium-with-t-T1HX34.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PHOMA 409 Phoma solani (Halsted) causes a 'damping off' of egg- plants. The disease attacks the seedHngs at the base of the stem, the fruit of the fungus appearing as exceedingly minute dots on the diseased part. Halsted, New Jersey Agric. Exp. Sta. Rep., 1891. Fig. 127.—Phoma sanguinolenta. i, diseased carrot; 2, diseased carrot flowering stem ; 3, portion of a diseased spot showing perithecia with the conidia escaping as a viscid tendril ; 4, section of a perithecium with t Stock Photo")
RMT1HX34–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PHOMA 409 Phoma solani (Halsted) causes a 'damping off' of egg- plants. The disease attacks the seedHngs at the base of the stem, the fruit of the fungus appearing as exceedingly minute dots on the diseased part. Halsted, New Jersey Agric. Exp. Sta. Rep., 1891. Fig. 127.—Phoma sanguinolenta. i, diseased carrot; 2, diseased carrot flowering stem ; 3, portion of a diseased spot showing perithecia with the conidia escaping as a viscid tendril ; 4, section of a perithecium with t
RM2AJ5XKX–Fungous diseases of plants . Fig. 87. Gooseberry Mildew. (After Close) or brown and thick-walled with age. The mycelium forms densecircular or effuse patches, sometimes completely covering a berryand the adjacent twig. The perithecia are imbedded in the dense mycelium. Theyaverage about 80-ioo/x in diameter and are beset with a fewlight brown, tortuous appendages. A single subglobose ascus ASCOMYCETES 223 contains relatively large spores. According to Salmon this speciesis indistinguishable from the Sphaerotheca found in Europe uponEuphorbia, The latter is, however, not very common in Europe,D
RMPG3W3N–. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. Plate 40. ^ c 1 -^^z f ENDOCARPON PUSILLUM Hedw. a. Whole plant, b. Portion of thallus and perithecia. c. Vertical section of thallus. d. Vertical section of perithecium and spermogonium. c Ascns and hymenial gonidia. /. Spore. </. Sterigmata and sperniatia.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble
RMMCKC5M–. Fic. 126.— I, Phyllostula violac on violet leaf; 2, section of a perilhecium of J'/iy/losticta ; 3,' spores of same ; 4, spot on violet leaf formed by the fungus ; 5, Phoina susf>ecta, on gooseberry twig ; 6, peritheciiini of same in section ; 7, spores of same. near the tip, are exceedingly common ; in fact it is difficult to meet with a shoot of the season clear of these dots, which are the perithecia of Phoina suspecta (Mass.). This fungus is slightly, if at all, parasitic in its nature, and does no real injury, but is somewhat interesting as having been on many
RMT1HJRX–Diseases of plants induced by Diseases of plants induced by cryptogamuc parasites; introduction to the study of pathogenic fungi, slime-fungi, bacteria, and algae. English ed. by William G. Smith diseasesofplants00tubeuoft Year: 1897 Fic. Otj.—OiUierii ynrcliiii. Isolated asoia with eight si>ores; jsohited hair from the outside of a perithecium. (v. Tubeuf del.) Flo. 95.—Giljljtra vaccinii on Cowberry. The perithecia forrn black patches on the living leafy bninch, as well as the dead brown one. (V. Tubeuf del.) Fill. 'JT.—Oihlttra caccinii. CroHa-soction (ill ow berry »howlnt{ a patcli of
RM2AJ17E3–Cane sugar; a textbook on the agriculture of the sugar cane, the manufacture of cane sugar, and the analysis of sugar-house products . aginisque sacchari officinarum India. THE PESTS AND DISEASES OF THE CANE 167 Figs. 68 and 69 show, after Butler, a piece of cane infected with thisdisease and also thespores. Nedria laurentiana (Marchal).—Stroma somewhat broad, convex, superficial1-2 m.m. diam. seated on a hyaline slender cottony, evanescent, at first free, laterconfluent white parenchyma ; perithecia densely caespitose, globose or ovoid, 250-350niicrons diam., strongly rugulose, even subsquamu
![. The fungi which cause plant disease . Plant diseases; Fungi. 210 THE FUNGI WHICH CAUSE PLANT DISEASE Dothichloe Atkinson (p. 199)"' Stroma thin, hard when dry, black, especially the outer portion, lighter within, effuse, pulvinate, disciform or armilla-form, partly or entirely surrounding the host; perithecia crowded, confluent with the stroma, but the thin walls of distinctive structure, im- mersed, the apex projecting; asci cylindric, 8-spored; spores fih- form, septate at maturity, and eventually separating at the septa into short seg- ments. Likfe the preceding genus, both species D Stock Photo](https://c8.alamy.com/comp/PG4GA7/the-fungi-which-cause-plant-disease-plant-diseases-fungi-210-the-fungi-which-cause-plant-disease-dothichloe-atkinson-p-199quot-stroma-thin-hard-when-dry-black-especially-the-outer-portion-lighter-within-effuse-pulvinate-disciform-or-armilla-form-partly-or-entirely-surrounding-the-host-perithecia-crowded-confluent-with-the-stroma-but-the-thin-walls-of-distinctive-structure-im-mersed-the-apex-projecting-asci-cylindric-8-spored-spores-fih-form-septate-at-maturity-and-eventually-separating-at-the-septa-into-short-seg-ments-likfe-the-preceding-genus-both-species-d-PG4GA7.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. 210 THE FUNGI WHICH CAUSE PLANT DISEASE Dothichloe Atkinson (p. 199)"' Stroma thin, hard when dry, black, especially the outer portion, lighter within, effuse, pulvinate, disciform or armilla-form, partly or entirely surrounding the host; perithecia crowded, confluent with the stroma, but the thin walls of distinctive structure, im- mersed, the apex projecting; asci cylindric, 8-spored; spores fih- form, septate at maturity, and eventually separating at the septa into short seg- ments. Likfe the preceding genus, both species D Stock Photo")
RMPG4GA7–. The fungi which cause plant disease . Plant diseases; Fungi. 210 THE FUNGI WHICH CAUSE PLANT DISEASE Dothichloe Atkinson (p. 199)"' Stroma thin, hard when dry, black, especially the outer portion, lighter within, effuse, pulvinate, disciform or armilla-form, partly or entirely surrounding the host; perithecia crowded, confluent with the stroma, but the thin walls of distinctive structure, im- mersed, the apex projecting; asci cylindric, 8-spored; spores fih- form, septate at maturity, and eventually separating at the septa into short seg- ments. Likfe the preceding genus, both species D
RMMCK6R9–. Fig. Wb. — PloKfirjhtia mor- Ijosa. Ascus, with eight spores. Spores in germina- tion. Filamentous para- physes. (Cop. from Farlow.) Fig. 114.—PloKcightia morbosa. (v. Tubeuf phot.) injurious and widely distributed disease of various species of Prunus, especially plum and cherry. The living branches and twigs become coated with a crust of warty excrescences, and at the same time are more or less thickened and deformed. A mycelium permeates the tissues of those swollen twigs, and forms black crusty stromata in which the perithecia are embedded. The perithecia contain simple paraphyses and eig
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] DIDYRIELLA 209 DIDYMELLA (Sacc.) Perithecia immersed, membranaceous, asci 4-8-spored, paraphyses present; spores elongated, i-septate, hyaline. Differs from Sphaerella in having paraphyses. Orange-tree canker {Didymella ciiri., Noack) forms long canker-like v/ounds with thickened margins on the branches of orange-trees in Brazil. The first symptom of disease is the Fig. 59.— VenturiiZ pirina. i, conidial form of fungus on pear leaf; 2, conidial form of fungus on pear, causing Stock Photo](https://c8.alamy.com/comp/T1HJR6/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-didyriella-209-didymella-sacc-perithecia-immersed-membranaceous-asci-4-8-spored-paraphyses-present-spores-elongated-i-septate-hyaline-differs-from-sphaerella-in-having-paraphyses-orange-tree-canker-didymella-ciiri-noack-forms-long-canker-like-vounds-with-thickened-margins-on-the-branches-of-orange-trees-in-brazil-the-first-symptom-of-disease-is-the-fig-59-venturiiz-pirina-i-conidial-form-of-fungus-on-pear-leaf-2-conidial-form-of-fungus-on-pear-causing-T1HJR6.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] DIDYRIELLA 209 DIDYMELLA (Sacc.) Perithecia immersed, membranaceous, asci 4-8-spored, paraphyses present; spores elongated, i-septate, hyaline. Differs from Sphaerella in having paraphyses. Orange-tree canker {Didymella ciiri., Noack) forms long canker-like v/ounds with thickened margins on the branches of orange-trees in Brazil. The first symptom of disease is the Fig. 59.— VenturiiZ pirina. i, conidial form of fungus on pear leaf; 2, conidial form of fungus on pear, causing Stock Photo")
RMT1HJR6–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] DIDYRIELLA 209 DIDYMELLA (Sacc.) Perithecia immersed, membranaceous, asci 4-8-spored, paraphyses present; spores elongated, i-septate, hyaline. Differs from Sphaerella in having paraphyses. Orange-tree canker {Didymella ciiri., Noack) forms long canker-like v/ounds with thickened margins on the branches of orange-trees in Brazil. The first symptom of disease is the Fig. 59.— VenturiiZ pirina. i, conidial form of fungus on pear leaf; 2, conidial form of fungus on pear, causing
RM2AKR48B–Annual report of the North Carolina Agricultural Experiment Station . perithecia was crushed, placed in a tube ofmelted pea agar, and poured into a Petri dish. When the ascospores began iOrton, lc.2Smith, lc. FUSARIUM CAUSING COWPEA WILT. 103 to germinate, one of the germinating spores was lifted out with the aid of adissecting microscope, and transferred to another plate. In about a weekfrom the time of sowing spores very small colorless perithecia appeared aroundthe center of the colony; the second day after the perithecia were first noticedthey began to turn red, and by the end of another w
RMPG4BPN–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fig. 96.—Gibbera vaccinii. Isolated ascns with, eight spores; isolated hair from the outside of a perithecium. (v. Tubeuf del.) Fig. 95.—Gibbera vaccinii on Cowberry. The perithecia form black patches on the living leafy branch, as well as the dead brown one. (v. Tubeuf del.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and a
RMMCK5H1–. Spring in the fallen needles, whicli lie on the ground over winter. The ascospores are mature and capable of infection at the beginning of June. In forests of pure larch, or in mixture with spruce, the ascospores are easily distributed by wind. In larch, underplanted with beech, the spores are kept down towards the ground by the canopy of beech foliage, so that, during the summer, they cannot be carried up to the larch crown. Hartig gives the following interesting facts on its distriljution. ,, , , , 1 1 ^1 -.1 â 1 Fic. 103.â('., Rod-sb.iped As alreadv remarked, the perithecia de- cunidia be
RMT1HK1A–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplants00tube Year: 1897 Fkj. 90.—Cucurhitaria labv.rni. A, Stroma witli pycnidia containing minute unicellular conidia. B, One of the large smooth pycnidia. (After v. Tubeuf.) The mature perithecia have a peridium consisting of a loose pseudoparenchyma with a rough warty exterior and a pore set in a distinct depression (Fig. 100.) The paraphyses are long, strong threads, often branched, and between them arise the long cylin
RM2AJ5T04–Fungous diseases of plants . 246 FUNGOUS DISEASES OF PLANTS Germination really consists in absorption of water, increase insize of the sclerotial mass, and the pushing into growth, some-times from many different points on the sclerotium, of compactmasses of hyphae, which develop into sporo-phores. These sporophores may be from onefourth to one inch in height, and they bear atthe summit head-shaped stromata within whichthe perithecia are differentiated. A cross sec-tion of the head-shaped stroma is shown inFig. 106, a. The sporophore consists of a stalk from onehalf to one inch in length, termi
RMPG42J9–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 186 ASCOMYCETES. The dark-red masses of thick-coated, warty perithecia appear in autumn and winter on the dead branches only; the asci contain eight bicellular hyaline spores which germinate directly to form a mycelium. Infection of a new host-plant is effected by the mycelium, which enters by open wounds into living branches; it is quite unable to penetrate the living bark and is dependent on wounds. The mycelium s
RMMCK6B8–. Fio. 115.—Ploirriiihtia mor- hosa. Ascus, with eight spores. Spores in germinn- tion. Filuinentou.s jwira- physes. (Cop. fnmi F!rlov.) Fig. 114.—Plowrightia morbosa. (v. Tubeuf phot.) injurious and widely distributed disease of various species of Prunas, especially plum and cherry. The living branches and twigs become coated with a crust of warty excrescences, and at the same time are more or less thickened and deformed. A mycelium permeates the tissues of those swollen twigs, and forms black crusty stromata in which the perithecia are embedded. The perithecia contain simple paraphyses and
RMT1HJRE–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplants00tube Year: 1897 •205 twigs brown and dead (Fig. 95). If more closely examined, the twigs will be found to bear patches of coal-black, Fig. 05.—Gibbera Cowberry. The perithecia form black patches on the living leafy branch, as well as the dead brown one. (v. Tubeuf del.) Fig. 07.—6ibbera vaccinii. Cross-section of Cowberry showing a patch of perithecia in section ; the hairy perithecia contain paraphvses and asci
RM2AJDAA5–Elementary botany . Fig. 225. Leaves of willow showing willow mildew. The black dots are the fruit bodies (perithecia) seated on the white mycelium. press on the cover glass with a needle until we see a few of theperithecia rupture. If this is done carefully we see severalsmall ovate sacs issue, each containing a number of spores, asshown in fig. 227. Such a sac is an ascus, and the spores areascospores. FUNGI: SAC FUNGI. 197 415. Number of spores in an ascus.—The ascus is the most importantcharacter showing the general relationship of the members of the sac fungi.. Fig. 226.Willow mildew;bit
RMPG46BW–. The fungi which cause plant disease . Plant diseases; Fungi. 266 THE FUNGI WHICH CAUSE PLANT DISEASE structures are regarded by Hasselbring ^^^ as organs of attachment to aid in infection, though they doubtless serve other pxu-poses as well. Perithecia of this species were first obtained by Clinton ^^^ who grew them in abundance on artificial media from sowings of coni- diospores taken from ptire cultures. The typical Gloeosporium stage was also grown from ascospores. Perithecia were also found in pure cultures on apple agar by Spaulding and von Schrenk. They appeared in black knotted masses
RMMCK6RC–. Fig. lOS.—Mo.miana fihibviala on Carpinua Betx'.lvs. Leaf of Hornbeam seen on lower surface. Stroma (enlarged), with the long black necks of the perithecia projecting from the ruptured leaf-epidermis, (v. Tubeuf del.) Valsa. A stroma is generally present, but is of very variable appear- ance ; embedded in it are the perithecia, with only their beak- like mouths projecting. The spores are hyaline or light-brown, unicellular, and generally bent. Xo paraphyses are present. Valsa oxystoma Eehm.- This causes disease and death of branches of Aim's viridis in the Alps. The symptoms are withering an
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] CLAVICEPS 223 Ergot.—This well-known disease, caused by Claviceps piirpicrea (Tul.), is often developed in the ears of various Fig. b.—Claviceps purpurea, i, ergot on rye-grass; 2, ergot on rye; 3, section of portion of conidial fruit ; 4, sclerotium or ergot bearing the stalked, ascigerous form of fruit; 5, head of ascigerous fruit showing warted surface, due to projecting mouths of perithecia; the section shoNss perithecia sunk in the fleshy stroma ; 6, ascus ; 7, free need Stock Photo](https://c8.alamy.com/comp/T1H04W/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-claviceps-223-ergotthis-well-known-disease-caused-by-claviceps-piirpicrea-tul-is-often-developed-in-the-ears-of-various-fig-bclaviceps-purpurea-i-ergot-on-rye-grass-2-ergot-on-rye-3-section-of-portion-of-conidial-fruit-4-sclerotium-or-ergot-bearing-the-stalked-ascigerous-form-of-fruit-5-head-of-ascigerous-fruit-showing-warted-surface-due-to-projecting-mouths-of-perithecia-the-section-shonss-perithecia-sunk-in-the-fleshy-stroma-6-ascus-7-free-need-T1H04W.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] CLAVICEPS 223 Ergot.—This well-known disease, caused by Claviceps piirpicrea (Tul.), is often developed in the ears of various Fig. b.—Claviceps purpurea, i, ergot on rye-grass; 2, ergot on rye; 3, section of portion of conidial fruit ; 4, sclerotium or ergot bearing the stalked, ascigerous form of fruit; 5, head of ascigerous fruit showing warted surface, due to projecting mouths of perithecia; the section shoNss perithecia sunk in the fleshy stroma ; 6, ascus ; 7, free need Stock Photo")
RMT1H04W–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] CLAVICEPS 223 Ergot.—This well-known disease, caused by Claviceps piirpicrea (Tul.), is often developed in the ears of various Fig. b.—Claviceps purpurea, i, ergot on rye-grass; 2, ergot on rye; 3, section of portion of conidial fruit ; 4, sclerotium or ergot bearing the stalked, ascigerous form of fruit; 5, head of ascigerous fruit showing warted surface, due to projecting mouths of perithecia; the section shoNss perithecia sunk in the fleshy stroma ; 6, ascus ; 7, free need
RM2AXHJB0–Nature and development of plants . 143, B, C), thus forming a solidbody, known as the ascocarp or perithecium (plu. perithecia), thatappears to the eye as a minute grain of sand. During this growthnumerous lateral branches arise on the hyphae derived from thegametospore and become transformed into asci as shown in Fig.144, A, B. The ascocarps finally decay and set free the asco-spores which develop a new plant or mycelium. Thus the entiresexual process, with the exception that the male gamete is notset free, is suggestive of the Rhodophyceae. The truffles are a curious group of related fungi t
RMPG4GAB–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 209 yellowish, cylindrical, slightly curved, discharged in twisted threads as in Cytospora, This fungus, originally described as Diaporthe parasitica, is a serious parasite on the chestnut. The mycelium grows through the inner bark in all directions from the initial wound at which in- fection occurred, eventually girdling the part. The wood is also affected. The perithecia appear in abundance upon or in cracks of the baxk, extruding their spores in greenish to yellow threads. Hypocrea Fries (p. 1
RMMCK6RW–. Fig. 104. —Sphaerella laricina. Section through a diseased larch needle in June after it has Iain on the ground from the previous year. The mycelium is thick, thick-walled, and of a light-brown colour. The perithecia contain asci and asco- spores. To the extreme right is a pycuidium containing little oblong conidia, alongside a perithecium. x ly^. (After R. Hartig.) for distribution by means of conidia. As, however, we ascend into the mountains, the snow lies longer, so that the perithecia cannot begin to form so early, the ascospores are correspondingly late in reaching maturity, and the se
RMT1HY9N–Diseases of crop-plants in the Diseases of crop-plants in the Lesser Antilles diseasesofcroppl00nowe Year: 1923 DISEASES OF SUGAR CANE 321 produced from small stromatic masses on the surface of the spot. The conidia are cylindrical or long elliptical, with very thick walls, olive green to brown in colour, 3-10 septate. Red Leaf-Spot. Red leaf-spot, originally described from Java, is recorded Fig. 134 Eriosphaeria Sacchari From Wakker & Went Asci AND Spore from the West Indies by Went in Aruba Island and L. H. Gough in Trinidad. It is caused by an ascomycete with round black perithecia and
RM2AJ5MBW–Fungous diseases of plants . r less polygonal in outline. The asci are clavate tooblong or slightly curved, 55-75 X 6-i2/x. They are numerous inthe perithecia and so far as noted there are no paraphyses. Thespores are eight, becoming two-celled, one of which is larger thanthe other. The spores are olive-brown in color, 11-15 x 5-7 M. The histological development of the perithecium has not beenfollowed. The ascospores germinate readily in water, and some-times true appressoria are produced, as stated in the case of the 270 FUNGOUS DISEASES OF PLANTS germination of the conidia. The observation h
RMPG4GCF–. The fungi which cause plant disease . Plant diseases; Fungi. 200 THE FUNGI WHICH CAUSE PLANT DISEASE Hypomyces Fries (p. 197) Stroma an effused cottony subicnlvun, often of considerable extent; perithecia numerous, usually thickly scattered and im- mersed in the subiculum, rarely superficial; asci cylindric, 8-spored; spores fusoid or fusiform, usually apiculate, rarely blunt, 2-celled, hyaline; conidial phase variable. This genus of some forty species contains but few > saprophytes, the majority being parasitic, chiefly on the larger fimgi. The genus is of economic interest only as affec
RMMCKC4N–. 4^ Fig. 139.—I, Coryneum beyeriiickii ; 2, Cycloconii/m oleaginiiin on olive leaf; 3, fungus of same ; 4, Scoletotrichiim melophthornm ; 5, Trichothecium roseum; 6, Acreino?iiella occulta; 7, Ophiocladium hordei; 8, Meria laricis 9, basidia and spores of same. All except Fig. 2 highly mag. had remained hanging on the tree throughout the winter. These perithecia were considered by Vuillemin as constituting the perfect form of fruit of Coryneum^ and received the name of Ascospoi-a beyermckii { = Asterula beyerinckii, Sacc). The relationship of the three forms mentioned above has not been est
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PJ' >-''i;.;i Fig. 49.—AV(//-;,; dl/isinia. i, ;i hiMnch recently attacked, showing concentric cracking of the bark ; 2, an old wound showing a rugged callus round the wound ; 3, section through a stroma showing perithecia, a. on its surface ; 4, a peritheciuni; 5, section of same; 6, conidia; 7, a conidium germinating; 8, ascus containing spores, and accompanied by paraphyses. Figs, i and 2 reduced ; remainder highly mag. more prevalent, and perhaps it is not going too fa Stock Photo](https://c8.alamy.com/comp/T1GXXY/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-pj-gt-ii-fig-49av-dlisinia-i-i-himnch-recently-attacked-showing-concentric-cracking-of-the-bark-2-an-old-wound-showing-a-rugged-callus-round-the-wound-3-section-through-a-stroma-showing-perithecia-a-on-its-surface-4-a-peritheciuni-5-section-of-same-6-conidia-7-a-conidium-germinating-8-ascus-containing-spores-and-accompanied-by-paraphyses-figs-i-and-2-reduced-remainder-highly-mag-more-prevalent-and-perhaps-it-is-not-going-too-fa-T1GXXY.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PJ' >-''i;.;i Fig. 49.—AV(//-;,; dl/isinia. i, ;i hiMnch recently attacked, showing concentric cracking of the bark ; 2, an old wound showing a rugged callus round the wound ; 3, section through a stroma showing perithecia, a. on its surface ; 4, a peritheciuni; 5, section of same; 6, conidia; 7, a conidium germinating; 8, ascus containing spores, and accompanied by paraphyses. Figs, i and 2 reduced ; remainder highly mag. more prevalent, and perhaps it is not going too fa Stock Photo")
RMT1GXXY–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] PJ' >-''i;.;i Fig. 49.—AV(//-;,; dl/isinia. i, ;i hiMnch recently attacked, showing concentric cracking of the bark ; 2, an old wound showing a rugged callus round the wound ; 3, section through a stroma showing perithecia, a. on its surface ; 4, a peritheciuni; 5, section of same; 6, conidia; 7, a conidium germinating; 8, ascus containing spores, and accompanied by paraphyses. Figs, i and 2 reduced ; remainder highly mag. more prevalent, and perhaps it is not going too fa
RM2ANC4B9–A text-book of mycology and plant pathology . Pig. 53.— Mildew of chestnut leaves due to Phyllaclinia corylei with ascus andperithecium to left. (Martic Forge, Pa., Nov. 2, 1915-) MILDEWS AND RELATED FUNGI 157 sphcera (Fig. 54) dichotoniously branched. These appendages prob-ably assist in the distribution of the perithecium, serving to attachthe perithecia to plants, if wind-l)orne, or to the bodies of insects bywhich they are carried to other plants. The number of asci found in aperithecium and the number and character of the spores in the ascivary generically (see Appendix VIII, pages 721-72
RMPFX47R–. The culture and diseases of the sweet pea. Sweet peas; Sweet peas. DISEASES IN GREENHOUSE 107 fungus is hyaline, closely septate, and branched (fig. 10a) when grown in the substratum of the media. The aerial my-. fig. 10. o showing mycelium of Chcetomium Spirochete. b hairs, c and d asci. e ascospores. celium consists of long unbranched fila- ments varying in color from light to deep lemon. The yellow seems to be produced within the fungus hyphse which later is also transmitted to the media. In pure culture the fungus produces its perithecia. Please note that these images are extracted from
RMMCK6CN–. spring ill the fallen needles, which lie on the ground over winter. The ascospores are mature and capable of infection at the beginning of June. In forests of pure larch, or in mixture with spruce, the ascospores are easily distributed by wind. In larch, underplanted with beech, the spores are kept down towards the ground by the canopy of beech foliage, so that, during the summer, they cannot be carried up to the larch crown. Hartig gives the following interesting fixcts on its distribution. ,, . , , 11,1 -^1 • 1 Fio. 103.—o, Rod-shaped As already remarked, the perithecia de- conidia before
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] I90 DISEASES OF CULTIVATED PLANTS the form of miniature pins with pale yellowish heads, and 1-2 mm. high. During January 190S a large consignment of diseased berries was received at Kew from Costa Rica. The berries '' fl,. fJ â Jf fT .7'' VG.z,o.âSpliacros(ilbeflavid<i. i, leaf showing disease ; 2, section showing conidia form ; 3, surface view of white spot bear- ing conidial stage of fungus; 4, section showing perithecia ; 5, two perithecia; 6, ascus containing eiglit s Stock Photo](https://c8.alamy.com/comp/T1GY90/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-i90-diseases-of-cultivated-plants-the-form-of-miniature-pins-with-pale-yellowish-heads-and-1-2-mm-high-during-january-190s-a-large-consignment-of-diseased-berries-was-received-at-kew-from-costa-rica-the-berries-fl-fj-jf-ft-7-vgzospliacrosilbeflavidlti-i-leaf-showing-disease-2-section-showing-conidia-form-3-surface-view-of-white-spot-bear-ing-conidial-stage-of-fungus-4-section-showing-perithecia-5-two-perithecia-6-ascus-containing-eiglit-s-T1GY90.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] I90 DISEASES OF CULTIVATED PLANTS the form of miniature pins with pale yellowish heads, and 1-2 mm. high. During January 190S a large consignment of diseased berries was received at Kew from Costa Rica. The berries '' fl,. fJ â Jf fT .7'' VG.z,o.âSpliacros(ilbeflavid<i. i, leaf showing disease ; 2, section showing conidia form ; 3, surface view of white spot bear- ing conidial stage of fungus; 4, section showing perithecia ; 5, two perithecia; 6, ascus containing eiglit s Stock Photo")
RMT1GY90–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] I90 DISEASES OF CULTIVATED PLANTS the form of miniature pins with pale yellowish heads, and 1-2 mm. high. During January 190S a large consignment of diseased berries was received at Kew from Costa Rica. The berries '' fl,. fJ â Jf fT .7'' VG.z,o.âSpliacros(ilbeflavid<i. i, leaf showing disease ; 2, section showing conidia form ; 3, surface view of white spot bear- ing conidial stage of fungus; 4, section showing perithecia ; 5, two perithecia; 6, ascus containing eiglit s
RM2AKPYT9–Annual report of the North Carolina Agricultural Experiment Station . -4 Fig. 8.—Old Irish potato culture?—b,internal fungus, showing sclerotia and whitefloccose growth; d, ascigerous fungus, show-ing numerous perithecia and scant mycelialgrowth. Eight tubes of boiled rice were prepared as follows: Eight grams of ricewere weighed into each tube and two cc. of water added. The tubes were thenautoclaved twenty minutes at 120° C. and inoculated; four with conidia fromagar cultures of the internal fungus and four with the ascigerous fungus.. Fig. 9.—Section of sclerotium showing compact mycelial s
RMPG4BP0–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fig. 99.—Cucurbitaria Idburni. A, Stroma with pycnidia containing minute unicellular conidia. B, One of the large smooth pycnidia. (After v. Tubeuf.) The mature perithecia have a peridium consisting of a loose pseudoparenchyma with a rough warty exterior and a pore set in a distinct depression (Fig. 100.) The paraphyses are long, strong threads, often branched, and between them arise the long cylindrical asci with r
RMMCRFNW–. Fig. 51.—Hypomyces perniciosKs. i, mushrooms deformed by the fungus, half nat. size ; 2, conidia of the fungus, highly mag. gallons of water; this should be repeated twice at an interval of about three weeks. Jour71. Bd. Agric. Leaflet, No. 139. Magnus, Verh. Ges. Deutsch. nat. u. Aerzte, 60, p. 246. Stapf, Verh. zool.-hot. Geseli., 39. p. 617. SPHAERELLA (Ces. and De Not.) Perithecia membranaceous, subglobose or depressed, covered by the epidermis or bursting through ; asci 8-spored ; spores elongated, i-septate, hyaline; paraphyses absent. N
RM2AKR3E2–Annual report of the North Carolina Agricultural Experiment Station . hefungus in the direction of lessened perithecia production, it might be possible toproduce a strain which would not produce perithecia at all. To test these two points, transfers to new media were made from the orig-inal colony (generation No. 1) in three ways: 1. Bits of mycelium bearing no conidia were transferred from the extremeedge of the colony. 2. Conidia were transferred by adding a drop of water to a conidial region,then with platinum loop transferring an oese of this water to new media. 3. Ascosporic transfers wer
![. Chestnut blight. Chestnut blight; Chestnut. ENDOTHIA GYROSA. VERTICAL SECTIONS OF STROMATA ON BEECH. X 32. FiQ. 1.—Showing Numerous Pycnidial Cavities andTwo Mature Perithecia. Fig. 2.—Showing Mature Pycnidia and Perithecia Side by Side. Except where otherwise indicate'l, the photomicrographs of strou]ata are from unytained sections cut with a freezing mlcrotouie. y. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. 1906-19 Stock Photo](https://c8.alamy.com/comp/PG15R7/chestnut-blight-chestnut-blight-chestnut-endothia-gyrosa-vertical-sections-of-stromata-on-beech-x-32-fiq-1showing-numerous-pycnidial-cavities-andtwo-mature-perithecia-fig-2showing-mature-pycnidia-and-perithecia-side-by-side-except-where-otherwise-indicatel-the-photomicrographs-of-strou-ata-are-from-unytained-sections-cut-with-a-freezing-mlcrotouie-y-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-the-original-work-1906-19-PG15R7.jpg ". Chestnut blight. Chestnut blight; Chestnut. ENDOTHIA GYROSA. VERTICAL SECTIONS OF STROMATA ON BEECH. X 32. FiQ. 1.—Showing Numerous Pycnidial Cavities andTwo Mature Perithecia. Fig. 2.—Showing Mature Pycnidia and Perithecia Side by Side. Except where otherwise indicate'l, the photomicrographs of strou]ata are from unytained sections cut with a freezing mlcrotouie. y. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. 1906-19 Stock Photo")
RMPG15R7–. Chestnut blight. Chestnut blight; Chestnut. ENDOTHIA GYROSA. VERTICAL SECTIONS OF STROMATA ON BEECH. X 32. FiQ. 1.—Showing Numerous Pycnidial Cavities andTwo Mature Perithecia. Fig. 2.—Showing Mature Pycnidia and Perithecia Side by Side. Except where otherwise indicate'l, the photomicrographs of strou]ata are from unytained sections cut with a freezing mlcrotouie. y. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. 1906-19
RMMCKC5K–. Fig. 127.—Phoma sanguinolenta. i, diseased carrot; 2, diseased carrot flowering stem ; 3, portion of a diseased spot showing perithecia with the conidia escaping as a viscid tendril ; 4, section of a perithecium with the conidia oozing out in a tendril. Figs. 1 and 2 reduced; remainder mag. Phoma solanicola (Prill, and Del.) attacks the haulm of the potato, forming large, oblong, whitish or clear yellow spots, which eventually become dotted over with the minute, blackish perithecia of the fungus. When the lateral branches are attacked the leaves soon wither, and when several branches are att
RM2AXF8W0–Text-book of structural and physiological botany . Fig. 393,—I. Agaria^s rubescens ; the receptacle (natural size) ; .? stipes ; v velumuniversale, a velu7npartiale or annulus. II. Part of a longitudinal sectionthrough the hymenium of another species : a pseudo-parenchynia ; b hymenuim ;c spores, (x 400.) 266 Structural and Physiological Botany, the conceptacles or perithecia^ usually opening outwards bya small orifice, the simple internal cavity of which is almostcompletely filled up by the soft hymenium (Fig. 395). The reoroductive cells are either the result of a process IT.. Fig. 394.—Truf
RMPG4AME–. Minnesota mushrooms ... Botany; Mushrooms. Figure 123. Xylaria polymorpha DALDINIA Daldinia concentrica. Figure 124. Daldinia concentrica Plants head-like or hemispheric, 2-5 cm. wide, black, coal-like, with concentric layers on the inside, each layer consisting of perithecia; spores brownish, ellipsoid, 12-15 X 7-lOju. The name refers to the layers. Common on dead branches, trunks, etc.; not edible.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly r
RMMCRDKG–. Fig. 65.—Epichloe typhina. i, fungus or leaf-sheath oiHolcus mollis; 2, fungus on Holciis lanatus ; 3, portion of fungus showing warts on surface, corresponding to mouths of perithecia ; 4, section of perithecium ; 5, ascus with spores escaping ; 6, ascospore ; 7, conidiophores with conidia. Figs, i and 2 reduced ; remainder mag. plant of which was infected. It is often abundant on wild grasses growing on the borders of fields, etc. The only preventive method that can be suggested is that of cutting the grass before the fungus becomes orange in P
RM2AGB367–. Textbook of pastoral and agricultural botany, for the study of the injurious and useful plants of country and farm. nd up one or several outgrowths, or stroma,with a knob-like end of a yellowish-brown color. In the hyphal tissue,which comprises the knob-like portion of the stroma, flask-shaped peri-thecia are formed with short necks and slightly protruding ostioles. Theasci contained in these perithecia are elongated and contain eight needle-shaped ascospores, which measure 60 to 70/i in length, and issue from thetip of the ascus by a small opening. These ascospores bud off condio- 28 POISON
RMPG21XM–. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. Plate 53. X 600 THELOPSIS RUBELLA Nyl. aaa a. Whole plant 6 Portion of thallus aad perithecia. c. Vertical section of thallus, d. Vertical section of perithecium. e. Ascns and paraphvsis /. Spores.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. British Museum (Natural History). Dept. of
RMMCK6W7–. Fig. 73.— Uncinulo, aceris. Perithecia. (After Tulasne.) into the cells. The mycelium forms white spots, but after a time causes the death of cells near it, so that brown withered spots appear. The leaves generally wither, the grapes, however, continue to grow at the places not attacked, till rupture of the coat ensues, then they shrivel up or fall a prey to mould-fungi. Sulphur is the preventive generally used (See p. 170). Uncinula aceris D. C. (Britain). This appears as white spots on the leaves of species of Acer, native and cultivated. When attacked by this mildew, young unfolding leave
RM2AKR2EG–Annual report of the North Carolina Agricultural Experiment Station . thecia even under careful microscopic examination. At this time (six-tieth day from inoculations) some of the mycelium with conidia was trans-ferred to plates of cowpea-leaf agar. In a few days perithecia appeared inabundance on the new growth. On the ninetieth day transfers were againmade from the alkaline rice to agar, with the same results. The ascigerous fungus was grown on a great many other media, viz., aspara-gus agar, carnation agar, steamed potato (both Irish and sweet), rice, steamedcowpea stems (both green and cur
RMPFX481–. The culture and diseases of the sweet pea. DISEASES IN GREENHOUSE 107 fungus is hyaline, closely septate, and branched (fig. 10^) when grown in the substratum of the media. The aerial my-. FIG. 10. a SHOWING mycelium of Chstomium Spirochete, b HAIRS, c and d asci. e ascospores. celium consists of long unbranched fila- ments varying in color from light to deep lemon. The yellow seems to be produced within the fungus hyphae which later is also transmitted to the media. In pure culture the fungus produces its perithecia. Please note that these images are extracted from scanned page images that
![. Fig. 104. —Spiiaerclia larktna. Section through a diseased larch needle in .June after it has lain on the ground from the previous j-ear. The mycelium is thick, thick-walled, and of a light-brown colour. The perithecia contain asci and asco- spores. To the extreme right is a pycnidium containing little oblong conidia, alongside a perithecium. x J-^". (After R. Hartig.) for distribution by means of conidia. As, however, we ascend into the mountains, the snow lies longer, so that the perithecia cannot begin to form so early, the ascospores are correspondingly late in reaching maturity, an Stock Photo](https://c8.alamy.com/comp/MCK6CD/fig-104-spiiaerclia-larktna-section-through-a-diseased-larch-needle-in-june-after-it-has-lain-on-the-ground-from-the-previous-j-ear-the-mycelium-is-thick-thick-walled-and-of-a-light-brown-colour-the-perithecia-contain-asci-and-asco-spores-to-the-extreme-right-is-a-pycnidium-containing-little-oblong-conidia-alongside-a-perithecium-x-j-quot-after-r-hartig-for-distribution-by-means-of-conidia-as-however-we-ascend-into-the-mountains-the-snow-lies-longer-so-that-the-perithecia-cannot-begin-to-form-so-early-the-ascospores-are-correspondingly-late-in-reaching-maturity-an-MCK6CD.jpg ". Fig. 104. —Spiiaerclia larktna. Section through a diseased larch needle in .June after it has lain on the ground from the previous j-ear. The mycelium is thick, thick-walled, and of a light-brown colour. The perithecia contain asci and asco- spores. To the extreme right is a pycnidium containing little oblong conidia, alongside a perithecium. x J-^". (After R. Hartig.) for distribution by means of conidia. As, however, we ascend into the mountains, the snow lies longer, so that the perithecia cannot begin to form so early, the ascospores are correspondingly late in reaching maturity, an Stock Photo")
RMMCK6CD–. Fig. 104. —Spiiaerclia larktna. Section through a diseased larch needle in .June after it has lain on the ground from the previous j-ear. The mycelium is thick, thick-walled, and of a light-brown colour. The perithecia contain asci and asco- spores. To the extreme right is a pycnidium containing little oblong conidia, alongside a perithecium. x J-^". (After R. Hartig.) for distribution by means of conidia. As, however, we ascend into the mountains, the snow lies longer, so that the perithecia cannot begin to form so early, the ascospores are correspondingly late in reaching maturity, an
RM2AG9XDX–. The Gardeners' chronicle : a weekly illustrated journal of horticulture and allied subjects. ducing abundantly sooty-black irregular pyriform osub-quadrate muriform spores, which vary in size from20—70 mk. long, by 10—20 mk. wide,* Stvlospokes : Phoma destrucUva.—Perithecia carbo-naceous, minute, globose, spherical clustered spores,hyaline, oval, cylindrical, binucleate, 5—6 mk. long, by1.5—I mk. wide. Another disease which sometimes but much morerarely attacks Tomatos while still growing is due toa Dactylium very closely allied to if not identicalwith D. roseum, B., from which it differs in
RMPG4BMX–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fio. 104. —Sphaerella laricina. Section through a diseased larch needle in June after it has lain on the ground from the previous year. The mycelium is thick, thick-walled, and of a light-brown colour. The perithecia contain asci and asco- spores. To the extreme right is a pycnidium containing little oblong conidia, alongside a perithecium. x ^-^. (After R. Hartig.) for distribution by means of conidia. As, however,
RMMCKCEB–. Fig. 69. —I, Gibellina cenalis on wheat plant, nat. size; 2, ascuh with spores of same, highly mag ; 3, Ophiobolus graminis, on wheat plant, nat. size ; 4, perithecium of same, mag ; 5, spores of same, highly mag. dying, so that the car does not escape from the sheath, or at best is but imperfectly developed. At this stage numerous perithecia are developed on the leaves, leaf-sheaths, and internodes of the stem on those portions previously occupied by the greyish mycelium, but are usually most abundant, and often confined to the inner surface of the leaf-slieaths. Perithecia globose, sunk in
RM2AWY1JX–Text-book of botany, morphological and physiological . ththe skin, a nuiTiber of closely packedbranches being formed at definite pointsfrom the medullary hypha*; the bundlebreaks through the skin, and grows upto a receptacle or stroma consisting ofa long stalk and a globular head. Inthe latter a large number of flask-shaped perithecia (Fig. 181, B and C,cp) appear, which do not possess aclearly-defined wall. Each perithecium is filled from the bottom by a number of asci,in each of which several slender thread-shaped spores are produced. These spores swellup in damp situations, and put out germ
![. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. THALLOPHYTA,. 1 CordycepB Taylori, a pyrenomycetous Fiirgu which attacks caterpillars; the branched antler-like stroma has developed rfrom the sclerotlum, and its lower warted portion bears the perithecia. 2 Three perithecia; enlarged. 3 a perithecium in section. * Two asci containing filamentous spores. » Vertical section of a perithecium of Xylaria Hypoxylon. 6 Ascus of same. "^ Mycelium of Eurotium. bearing a conidial hypha (to riglit, above), a commencing fruit (to left), and a ripe ascus-fr Stock Photo](https://c8.alamy.com/comp/PG1RDM/the-natural-history-of-plants-their-forms-growth-reproduction-and-distribution-botany-thallophyta-1-cordycepb-taylori-a-pyrenomycetous-fiirgu-which-attacks-caterpillars-the-branched-antler-like-stroma-has-developed-rfrom-the-sclerotlum-and-its-lower-warted-portion-bears-the-perithecia-2-three-perithecia-enlarged-3-a-perithecium-in-section-two-asci-containing-filamentous-spores-vertical-section-of-a-perithecium-of-xylaria-hypoxylon-6-ascus-of-same-quot-mycelium-of-eurotium-bearing-a-conidial-hypha-to-riglit-above-a-commencing-fruit-to-left-and-a-ripe-ascus-fr-PG1RDM.jpg ". The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. THALLOPHYTA,. 1 CordycepB Taylori, a pyrenomycetous Fiirgu which attacks caterpillars; the branched antler-like stroma has developed rfrom the sclerotlum, and its lower warted portion bears the perithecia. 2 Three perithecia; enlarged. 3 a perithecium in section. * Two asci containing filamentous spores. » Vertical section of a perithecium of Xylaria Hypoxylon. 6 Ascus of same. "^ Mycelium of Eurotium. bearing a conidial hypha (to riglit, above), a commencing fruit (to left), and a ripe ascus-fr Stock Photo")
RMPG1RDM–. The natural history of plants, their forms, growth, reproduction, and distribution;. Botany. THALLOPHYTA,. 1 CordycepB Taylori, a pyrenomycetous Fiirgu which attacks caterpillars; the branched antler-like stroma has developed rfrom the sclerotlum, and its lower warted portion bears the perithecia. 2 Three perithecia; enlarged. 3 a perithecium in section. * Two asci containing filamentous spores. » Vertical section of a perithecium of Xylaria Hypoxylon. 6 Ascus of same. "^ Mycelium of Eurotium. bearing a conidial hypha (to riglit, above), a commencing fruit (to left), and a ripe ascus-fr
RMMCKC4T–. FiG. 133.—Ascochytaaspidistrac. i, on portion of a leaf of.ispuiis/ra liirida ; 2, perithecia of the fungus bursting through the e|3iderniis of the leaf, mag; 3, section of a peritheciuni, mag ; 4, spores, higlily mag. ing minute cavities with a raised border. The conidia are very numerous, hyaline, elliptic-oblong, i-septate, smooth, 18-24x5-7 /x. Diseased portions should be removed and burned. ASCOCHYTA (Lir..) Perithecia minute, generally immersed in the substance of bleached spots on leaves or twigs, with a terminal pore; i-septate, hyaline.
RM2AJ5X9G–Fungous diseases of plants . Fig. 89. Mildew on Peaches ASCOMYCETES ?25 Following a moist early summer I have found the perithecia abun-dant on old leaves in the shade during a very dry period in latesummer (Fig. 90). Control. Thorough dusting with flowers of sulfur every ten daysis often sufficient. Ammoniacal copper carbonate is also effective.. Fig. 90. Rose Mildew, Perithecia Present Sulfuric acid i to 1000 has recently been recommended. No ex-periments have been reported respecting the use of the self-cooked lime-sulfur for the rose mildew, but there is reason tobelieve that it may be far
RMPG3W4C–. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. X 600. X 600 DBRMATOCARPON LAGHNBUM A. L. Sm. a. Whole plant, h. Portion of thallus and perithecia, c. Vertical section of thallus. d. Vertical section of perithecia. e. Ascus and paraphysis. /. Spores.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. British Museum (Natural History). Dept
![. Fio. lOS.—Mamiana fimhriala on Carpinus Setv.lv.s. Leaf of Hornbeam seen on lower surface. Stroma (enlarged), with the long black necks of the perithecia projecting from the ruptured leaf-epidermis, (v. Tubeuf del.) Valsa. A stroma is generally present, but is of very variable appear- ance ; embedded in it are the perithecia, with only their beak- like mouths projecting. The spores are hyaline or light-brown, unicellular, and generally bent. No paraphyses are present. Valsa oxystoma liehm." This causes disease and death of branches of Alnus viridis in the Alps. The symptoms are withermg Stock Photo](https://c8.alamy.com/comp/MCK6BT/fio-losmamiana-fimhriala-on-carpinus-setvlvs-leaf-of-hornbeam-seen-on-lower-surface-stroma-enlarged-with-the-long-black-necks-of-the-perithecia-projecting-from-the-ruptured-leaf-epidermis-v-tubeuf-del-valsa-a-stroma-is-generally-present-but-is-of-very-variable-appear-ance-embedded-in-it-are-the-perithecia-with-only-their-beak-like-mouths-projecting-the-spores-are-hyaline-or-light-brown-unicellular-and-generally-bent-no-paraphyses-are-present-valsa-oxystoma-liehmquot-this-causes-disease-and-death-of-branches-of-alnus-viridis-in-the-alps-the-symptoms-are-withermg-MCK6BT.jpg ". Fio. lOS.—Mamiana fimhriala on Carpinus Setv.lv.s. Leaf of Hornbeam seen on lower surface. Stroma (enlarged), with the long black necks of the perithecia projecting from the ruptured leaf-epidermis, (v. Tubeuf del.) Valsa. A stroma is generally present, but is of very variable appear- ance ; embedded in it are the perithecia, with only their beak- like mouths projecting. The spores are hyaline or light-brown, unicellular, and generally bent. No paraphyses are present. Valsa oxystoma liehm." This causes disease and death of branches of Alnus viridis in the Alps. The symptoms are withermg Stock Photo")
RMMCK6BT–. Fio. lOS.—Mamiana fimhriala on Carpinus Setv.lv.s. Leaf of Hornbeam seen on lower surface. Stroma (enlarged), with the long black necks of the perithecia projecting from the ruptured leaf-epidermis, (v. Tubeuf del.) Valsa. A stroma is generally present, but is of very variable appear- ance ; embedded in it are the perithecia, with only their beak- like mouths projecting. The spores are hyaline or light-brown, unicellular, and generally bent. No paraphyses are present. Valsa oxystoma liehm." This causes disease and death of branches of Alnus viridis in the Alps. The symptoms are withermg
RM2AJ5JP9–Fungous diseases of plants . ic tis-sue which is now cup-shapedshows the development offlask-shaped perithecia sunkenin that portion of the stromawhich is made up chiefly offungous tissue. Bordering thestroma a black line of moreabundant fungous tissue isalso evident. The body of theperithecium is elliptical orovate at maturity, and it is com-pletely filled with long-cylin-drical asci about 160 x 13/a.The asci are thick-walled withterminal pore, and contain at maturity eight more or less spher-ical, brown spores. The latter often measure 13 x lO/i, and a clearspace along one side indicates the
RMPG4G9T–. The fungi which cause plant disease . Plant diseases; Fungi. 212 THE FUNGI WHICH CAUSE PLANT DISEASE usually knot-like head; perithecia closely scattered, sunken in the stroma with only the ostiole protruding, flask-shaped, the walls scarcely distinguishable from the stroma; asci cylindric, il^2«* e. Fig. 152.—C. purpurea. D, Sphacelia stage; E, germinated sclerotia; G, sec- tion of stroma; H, section of a perithecium; J, ascus with spores. After Tulasne. 8-spored; spores hyaline, continuous. Some twelve or fifteen species are recorded all affecting the ovaries of the Gramineae. C. purpurea
RMMCK6E9–. Fig. S5.—Claviceps purpurea. A, Selei-otium with seven stromata (cl). B, median longitudinal section through the upper part of a stroma, the flask-shaped perithecia (cp) are embedded in the head. C, Perithecium in longitudinal section (highly magnified)—fej/, hyphal tissue ; sh, cortical tissue of the stroma ; c/>, orifice of the perithecium. D, Isolated ascus ruptured, so that the thread-like asco- spores {sp) have begun to escape. (After Tulasne, from Sach's Lchrbvch.) hyphal tissue. In this condition they are introduced along with grain into bread, which when eaten acts as a powerful p
RM2AWN4W2–Oidium or powdery mildew of the vine . A B Fig. 6. Photomicrographs of Perithecia on Surface of Leaf.A. Magnified 8 times. B. Magnified 35 times. OIDIUM OR POWDERY MILDEW OP THE VINE. 323 A mature perithecium consists of a nearly spherical case containing from four to eight cell-sacks called asci. The walls of this case arestrong and resistant to cold and other unfavorable conditions whichdestroy the summer forms of the fungus. They are made up of thickpolygonal cells and form a very efficient protection to the asci. Anascus contains from four to six spores. (See figs. 8 and 5, IV.) Each perit
RMPG4G79–. The fungi which cause plant disease . Plant diseases; Fungi. FiQ. 159.—^A single perithecium of A. vaccinii taken from a pure culture on corn meal. After Shear. Fig. 160.—Acan- thorhynchus; a germinating as- cospore bearing the peculiar appressorium, 17, view from above. After Shear. old fallen leaves. In culture, however, it produces abundant peri- thecia. When on the leaf the perithecia are subepidermal and are sparsely scattered over the lower surface. No conidial or pycnidial form is known. Remarkable appressoria are produced by the germ tubes from the spores, Fig. 160. Sphseriacese (p.
RMMCK5HF–. Fig. 99.—Cucurbitaria laburni.. A, Stroma with pycnidia containing minute unicellular conidia. B, One of the large smooth pycnidia. (After v. Tubeuf.) The mature perithecia have a peridium consisting of a loose pseudoparenchyma with a rough warty exterior and a pore set in a distinct depression (Fig. 100.) The paraphyses are long, strong threads, often branched, and between them arise the long cylindrical asci with rounded ends. The normal number of ascospores is eight in each ascus, but fewer is no exception. In addition to the forms already described, pycnidia of still another sort occur (
RM2AJG1JX–Comprehensive catalogue of Queensland plants, both indigenous and naturalised To which are added, where known, the aboriginal and other vernacular names; with numerous illustrations, and copious notes on the properties, features, &c., of the plants . J to OTidiA, jatv.il-^tCvJTY. p*k. $46. Tribliadella rufula, Spreng. 848. Epichloe cinerea, S^r/e. gf Br. .847. Hysterographium hiascens, Rehm. 849. Hypocrea discoidea, 5<?r£. c/ Br. 850. Nectria coccinea, Fries. Cluster of perithecia nat. size, sect, of perithecium enl., and ascus enl. 851. Hypomyces AURANTIUS, Till. (a) Hypomyces on Panus, (
RMPG4GJ1–. The fungi which cause plant disease . Plant diseases; Fungi. 168 THE FUNGI WHICH CAUSE PLANT DISEASE three to six on the ends of hyaline branches, Fig. 119. These conidia fall apart as they age. The hyaline conidia preponderate in early disease, giving the surface of the root a mildewed appearance; the dark conidia pre- ponderate later, covering the root with a black coating. Finally, after the host is dead, the ascocarps appear. The delicate hyaline myce- lium wanders through the affected root disorganizing its tissue. The superficial myce- lium is Ughtly tinted. Perithecia 80-100 n; asci o
RMMCK6RY–. Fig. 96.—Gibbera vaccinii. Isolated asctis with eight spores ; isolated hair from the outside of a perithecium. (v. Tubeuf del.) Fig. 95.—Gibbera vaccinii on Cowberry. The perithecia form black patches on the living leafy branch, as well as the dead Jarown one. (v. Tubeuf del.) Fig. 97.—Gibbera vaccinii. Cross-section of Cowberry showing a patch of perithecia in section; the hairy perithecia contain paraphyses and asci with spores ; a mycelium permeates the cortical tissue of the host. Short hooked hairs cover the epidermis of the stem. (v. Tubeuf del.) spherical perithecia, which are coated
RM2AXGG5Y–Annual report of the Fruit Growers' Association of Ontario, 1896 . Fig. 9. Fig. 10. Fig. 11. Fiff. 12. Fig. 13. Fig. 9.—Twig with two scale insects. One of them killed by Gor<lyceps clavulata, having three sporophores of the fungus. Fig. 10.—Head of one of the sporophores enlarged. Fig. 11.—Cross-section of head of sporophore showing the flask-like perithecia greatly enlarged. Theseperithecia are filled with sacs as indicated at a. Fife. 12.—A sac or ascus containing eight sporidia still more highly enlarged. Fig. 13.—A sporidium or seed magnified 750 diameters. The fly-fungus, Empusa muscc
RMPG44C6–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 500 SPECIAL PLANT PATHOLOGY temperature conditions were favorable. Asrospores were not expelled during the warm winter rains, but during the summer rains ascospores. Fig. 177.—Spore-sacs or asci with eight two-celled ascospores of chestnut blight fungus (Endothia parasitica). Below diagram showing relative size of pycnospores (left) and ascospores (right). (After Heald, F. D., Bull. 5, Chestnut Tree Blight Com., 1913.) are forcibly expelled in large numbers from the perithecia during an
![. Fig. S5.—Claviceps purpurea. A, Sclei-otiuin with seven strotnata {ci). B, median longitudinal section through the upper part of a stroma, the flask-shaped perithecia {cp) are embedded in the head. C, Perithecium in longitudinal section (highly magnified)—hy, hyphal tissue ; sh, cortical tissue of the stroma ; c/j, orifice of the perithecium. " D, Isolated ascus ruptured, so that the thread-like asco- spores (sp) have begun to escape. (After Tulasne, from Sach's Lehrlmch.) hyphal tissue. In this condition they are introduced along with grain into bread, which when eaten acts as a powerf Stock Photo](https://c8.alamy.com/comp/MCK6TX/fig-s5claviceps-purpurea-a-sclei-otiuin-with-seven-strotnata-ci-b-median-longitudinal-section-through-the-upper-part-of-a-stroma-the-flask-shaped-perithecia-cp-are-embedded-in-the-head-c-perithecium-in-longitudinal-section-highly-magnifiedhy-hyphal-tissue-sh-cortical-tissue-of-the-stroma-cj-orifice-of-the-perithecium-quot-d-isolated-ascus-ruptured-so-that-the-thread-like-asco-spores-sp-have-begun-to-escape-after-tulasne-from-sachs-lehrlmch-hyphal-tissue-in-this-condition-they-are-introduced-along-with-grain-into-bread-which-when-eaten-acts-as-a-powerf-MCK6TX.jpg ". Fig. S5.—Claviceps purpurea. A, Sclei-otiuin with seven strotnata {ci). B, median longitudinal section through the upper part of a stroma, the flask-shaped perithecia {cp) are embedded in the head. C, Perithecium in longitudinal section (highly magnified)—hy, hyphal tissue ; sh, cortical tissue of the stroma ; c/j, orifice of the perithecium. " D, Isolated ascus ruptured, so that the thread-like asco- spores (sp) have begun to escape. (After Tulasne, from Sach's Lehrlmch.) hyphal tissue. In this condition they are introduced along with grain into bread, which when eaten acts as a powerf Stock Photo")
RMMCK6TX–. Fig. S5.—Claviceps purpurea. A, Sclei-otiuin with seven strotnata {ci). B, median longitudinal section through the upper part of a stroma, the flask-shaped perithecia {cp) are embedded in the head. C, Perithecium in longitudinal section (highly magnified)—hy, hyphal tissue ; sh, cortical tissue of the stroma ; c/j, orifice of the perithecium. " D, Isolated ascus ruptured, so that the thread-like asco- spores (sp) have begun to escape. (After Tulasne, from Sach's Lehrlmch.) hyphal tissue. In this condition they are introduced along with grain into bread, which when eaten acts as a powerf
RM2AXFAB6–Annual report of the Fruit Growers' Association of Ontario, 1896 . Fig. 9. Fig. 10. Fig. 11. Fiff. 12. Fig. 13. Fig. 9.—Twig with two scale insects. One of them killed by Gor<lyceps clavulata, having three sporophores of the fungus. Fig. 10.—Head of one of the sporophores enlarged. Fig. 11.—Cross-section of head of sporophore showing the flask-like perithecia greatly enlarged. Theseperithecia are filled with sacs as indicated at a. Fife. 12.—A sac or ascus containing eight sporidia still more highly enlarged. Fig. 13.—A sporidium or seed magnified 750 diameters. The fly-fungus, Empusa muscc
![. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. ASCOMYCETES 225 Following a moist early summer I have found the perithecia abun- dant on old leaves in the shade during a very dry period in late summer (Fig. 90). Control. Thorough dusting with flowers of sulfur every ten days is often sufficient. Ammoniacal copper carbonate is also effective.. Fig. 90. Rose Mildew, Perithecia Present Sulfuric acid 1 to 1000 has recently been recommended. No ex- periments have been reported respecting the use of the " self- cooked " lime Stock Photo](https://c8.alamy.com/comp/PG3YNC/fungous-diseases-of-plants-with-chapters-on-physiology-culture-methods-and-technique-fungi-in-agriculture-ascomycetes-225-following-a-moist-early-summer-i-have-found-the-perithecia-abun-dant-on-old-leaves-in-the-shade-during-a-very-dry-period-in-late-summer-fig-90-control-thorough-dusting-with-flowers-of-sulfur-every-ten-days-is-often-sufficient-ammoniacal-copper-carbonate-is-also-effective-fig-90-rose-mildew-perithecia-present-sulfuric-acid-1-to-1000-has-recently-been-recommended-no-ex-periments-have-been-reported-respecting-the-use-of-the-quot-self-cooked-quot-lime-PG3YNC.jpg ". Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. ASCOMYCETES 225 Following a moist early summer I have found the perithecia abun- dant on old leaves in the shade during a very dry period in late summer (Fig. 90). Control. Thorough dusting with flowers of sulfur every ten days is often sufficient. Ammoniacal copper carbonate is also effective.. Fig. 90. Rose Mildew, Perithecia Present Sulfuric acid 1 to 1000 has recently been recommended. No ex- periments have been reported respecting the use of the " self- cooked " lime Stock Photo")
RMPG3YNC–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. ASCOMYCETES 225 Following a moist early summer I have found the perithecia abun- dant on old leaves in the shade during a very dry period in late summer (Fig. 90). Control. Thorough dusting with flowers of sulfur every ten days is often sufficient. Ammoniacal copper carbonate is also effective.. Fig. 90. Rose Mildew, Perithecia Present Sulfuric acid 1 to 1000 has recently been recommended. No ex- periments have been reported respecting the use of the " self- cooked " lime
RMMCK6W4–. Fio. 77.âNectria ciaiu'.bariiw., with peri- tliucia on the dead bark of a still-living stem of Elm. Infection has evidently begun at the wound of a cut branch near the middle, and extended outwards, (v. Tubeuf phot.) Fig. 78.âXectrUi ciivaalMnno.. Portion of branch (magnified). Light-coloured cushions of conidiophores with conidia are breaking out towards the upper end, and colonies of hard red perithecia towards the lower end. (After Tulasne.) he found almost at any time on the dead Ijranches of many deciduous trees, e.g.,, Acsculus, Acer, Tilia, Morns, Ulmus, etc.; also on Loniccra, Samhuc
RM2AG46T9–. The American journal of tropical medicine. Fifi. 10. Cultures of Allescheria Boydii From left to right (1) plain agar, (2) Sabourauds agar, (3) potato (4) beerwort. The dark sjiecks on the mycelium in cultures 2 and 3, and the whollydark character of the growth in (4) are the perithecia. 262 MARK F. BOYD AND EARL D. CRUTCHFIELD. Fig. 11. Morphology of Allescheria ix Culture a, Coremium; b, Conidia with conidiaspores; c, Exterior of perithecium;d, Section of a mature perithecium filled with spores; e, Section of an immatureperithecium, showing a few asci; f, A mature ascus with eight spores;
![. The fungi which cause plant disease . Plant diseases; Fungi. 228 THE FUNGI WHICH CAUSE PLANT DISEASE Trichosphaeria Fuckel (p. 226) Perithecia usually free, globose, woody or carbonous, hairy, ostiole flat or papillate; asci-cylindric, 8-spored; spores 1 to 2-celled, hyaline; paraphyses present. There are some forty species, mainly saprophytes. T. sacchari Mass.^"- ^^ Perithecia broadly ovate, dark-brown, beset with brown hairs; spores elongate-ellipsoid, 1-celled; the conidial forms are various. Fig. 162.—^Trichosphseria. E, habit sketch; G, conidial stage. After Lindau, Winter and Bre Stock Photo](https://c8.alamy.com/comp/PG4G73/the-fungi-which-cause-plant-disease-plant-diseases-fungi-228-the-fungi-which-cause-plant-disease-trichosphaeria-fuckel-p-226-perithecia-usually-free-globose-woody-or-carbonous-hairy-ostiole-flat-or-papillate-asci-cylindric-8-spored-spores-1-to-2-celled-hyaline-paraphyses-present-there-are-some-forty-species-mainly-saprophytes-t-sacchari-massquot-perithecia-broadly-ovate-dark-brown-beset-with-brown-hairs-spores-elongate-ellipsoid-1-celled-the-conidial-forms-are-various-fig-162trichosphseria-e-habit-sketch-g-conidial-stage-after-lindau-winter-and-bre-PG4G73.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. 228 THE FUNGI WHICH CAUSE PLANT DISEASE Trichosphaeria Fuckel (p. 226) Perithecia usually free, globose, woody or carbonous, hairy, ostiole flat or papillate; asci-cylindric, 8-spored; spores 1 to 2-celled, hyaline; paraphyses present. There are some forty species, mainly saprophytes. T. sacchari Mass.^"- ^^ Perithecia broadly ovate, dark-brown, beset with brown hairs; spores elongate-ellipsoid, 1-celled; the conidial forms are various. Fig. 162.—^Trichosphseria. E, habit sketch; G, conidial stage. After Lindau, Winter and Bre Stock Photo")
RMPG4G73–. The fungi which cause plant disease . Plant diseases; Fungi. 228 THE FUNGI WHICH CAUSE PLANT DISEASE Trichosphaeria Fuckel (p. 226) Perithecia usually free, globose, woody or carbonous, hairy, ostiole flat or papillate; asci-cylindric, 8-spored; spores 1 to 2-celled, hyaline; paraphyses present. There are some forty species, mainly saprophytes. T. sacchari Mass.^"- ^^ Perithecia broadly ovate, dark-brown, beset with brown hairs; spores elongate-ellipsoid, 1-celled; the conidial forms are various. Fig. 162.—^Trichosphseria. E, habit sketch; G, conidial stage. After Lindau, Winter and Bre
RMMCK5FT–. Flo. 115.—Ploicrightia mor- bosa. Ascus, with eight spores. Spores in gcrtnina- tion. Filamentous jNira- physes. (Cop. fruin Farlow.) I'll.. i.PloirngUli<i „ioibom. (v. Tiibciif jiliut.) injurious and widely distributed disease of various species of rrunas, especially plum and cherry. Tlie living branches ami twigs become coated with a crust of warty excrescences, and at the same time are more or less thickened and dcrniiui'd. A mycelium permeates the tissues of tliose swollen Iwii^s, and forms black crusty stromata in which the perithecia are embedded. The perithecia contain sim})le p
![Field studies on the dissemination and growth of the chestnut blight fungus [microform] . Inoculation at the base of broken twigs. ? * ?? ^ A- . H fl ? ^ ?^???^Ih^ »--* Artificial wind inoculation with bellows. p^x. .j^i ^xg^^^Mu-^ O^B^^^^^^^H maSsM • •SV^^K.-^ i^^ j ^^H^^l W «^»va f ^MHj ? 1 ^^ ? - ^-Af .y^^K^ h HBB^?^ R*- j Testing the carrying power of the wind. Sterile plates exposed on tripod atthe right. Active perithecia on the upright logs at the left. Wind blow-ing from the logs toward the plates.. Stock Photo](https://c8.alamy.com/comp/2AJ4H90/field-studies-on-the-dissemination-and-growth-of-the-chestnut-blight-fungus-microform-inoculation-at-the-base-of-broken-twigs-a-h-fl-ih-artificial-wind-inoculation-with-bellows-px-ji-xgmu-obh-massm-svk-i-j-hl-w-va-f-mhj-1-af-yk-h-hbb-r-j-testing-the-carrying-power-of-the-wind-sterile-plates-exposed-on-tripod-atthe-right-active-perithecia-on-the-upright-logs-at-the-left-wind-blow-ing-from-the-logs-toward-the-plates-2AJ4H90.jpg "Field studies on the dissemination and growth of the chestnut blight fungus [microform] . Inoculation at the base of broken twigs. ? * ?? ^ A- . H fl ? ^ ?^???^Ih^ »--* Artificial wind inoculation with bellows. p^x. .j^i ^xg^^^Mu-^ O^B^^^^^^^H maSsM • •SV^^K.-^ i^^ j ^^H^^l W «^»va f ^MHj ? 1 ^^ ? - ^-Af .y^^K^ h HBB^?^ R*- j Testing the carrying power of the wind. Sterile plates exposed on tripod atthe right. Active perithecia on the upright logs at the left. Wind blow-ing from the logs toward the plates.. Stock Photo")
RM2AJ4H90–Field studies on the dissemination and growth of the chestnut blight fungus [microform] . Inoculation at the base of broken twigs. ? * ?? ^ A- . H fl ? ^ ?^???^Ih^ »--* Artificial wind inoculation with bellows. p^x. .j^i ^xg^^^Mu-^ O^B^^^^^^^H maSsM • •SV^^K.-^ i^^ j ^^H^^l W «^»va f ^MHj ? 1 ^^ ? - ^-Af .y^^K^ h HBB^?^ R*- j Testing the carrying power of the wind. Sterile plates exposed on tripod atthe right. Active perithecia on the upright logs at the left. Wind blow-ing from the logs toward the plates..
![. The fungi which cause plant disease . Plant diseases; Fungi. 172 THE FUNGI WHICH CAUSE PLANT DISEASE formed at once and the mycelium develops to a more or less circular colony, producing new conidia in a few days. Artificial inoculations on susceptible plants, using conidia, usually result within two to five days in typical mildew spots. Neger,*" who studied the germination of conidia extensively has shown that light hastens the growth of the germ tubes, which in many cases are negatively phototropic. Con- tact stimulus leads to the growth of appres- soria. The perithecia are subspheric Stock Photo](https://c8.alamy.com/comp/PG4GH7/the-fungi-which-cause-plant-disease-plant-diseases-fungi-172-the-fungi-which-cause-plant-disease-formed-at-once-and-the-mycelium-develops-to-a-more-or-less-circular-colony-producing-new-conidia-in-a-few-days-artificial-inoculations-on-susceptible-plants-using-conidia-usually-result-within-two-to-five-days-in-typical-mildew-spots-negerquot-who-studied-the-germination-of-conidia-extensively-has-shown-that-light-hastens-the-growth-of-the-germ-tubes-which-in-many-cases-are-negatively-phototropic-con-tact-stimulus-leads-to-the-growth-of-appres-soria-the-perithecia-are-subspheric-PG4GH7.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. 172 THE FUNGI WHICH CAUSE PLANT DISEASE formed at once and the mycelium develops to a more or less circular colony, producing new conidia in a few days. Artificial inoculations on susceptible plants, using conidia, usually result within two to five days in typical mildew spots. Neger,*" who studied the germination of conidia extensively has shown that light hastens the growth of the germ tubes, which in many cases are negatively phototropic. Con- tact stimulus leads to the growth of appres- soria. The perithecia are subspheric Stock Photo")
RMPG4GH7–. The fungi which cause plant disease . Plant diseases; Fungi. 172 THE FUNGI WHICH CAUSE PLANT DISEASE formed at once and the mycelium develops to a more or less circular colony, producing new conidia in a few days. Artificial inoculations on susceptible plants, using conidia, usually result within two to five days in typical mildew spots. Neger,*" who studied the germination of conidia extensively has shown that light hastens the growth of the germ tubes, which in many cases are negatively phototropic. Con- tact stimulus leads to the growth of appres- soria. The perithecia are subspheric
![. Hartig gives the following interesting facts on its distribution. ,, , , , 111 • 1 • 1 Fig. 103.—«, Rod-shaped As already remarked, the perithecia de- comdia before and after , . ,1 n 1^ ^ ^ -l^ detachment from the velop in spring on the lallen larch needles, basidia. b, Micro-conidia -, . , , . IT,- ,1 ^ from the interior of the and in low-lying localities the spores reach cushions, x ^i". (After maturity at the beginning of June. Xew ^' ^^^^^^-^ conidial cushions are not found on the larch in our neighbourhood before July. The parasite has thus four months at its disposal Stock Photo](https://c8.alamy.com/comp/MCK6RM/hartig-gives-the-following-interesting-facts-on-its-distribution-111-1-1-fig-103-rod-shaped-as-already-remarked-the-perithecia-de-comdia-before-and-after-1-n-1-l-detachment-from-the-velop-in-spring-on-the-lallen-larch-needles-basidia-b-micro-conidia-it-1-from-the-interior-of-the-and-in-low-lying-localities-the-spores-reach-cushions-x-iquot-after-maturity-at-the-beginning-of-june-xew-conidial-cushions-are-not-found-on-the-larch-in-our-neighbourhood-before-july-the-parasite-has-thus-four-months-at-its-disposal-MCK6RM.jpg ". Hartig gives the following interesting facts on its distribution. ,, , , , 111 • 1 • 1 Fig. 103.—«, Rod-shaped As already remarked, the perithecia de- comdia before and after , . ,1 n 1^ ^ ^ -l^ detachment from the velop in spring on the lallen larch needles, basidia. b, Micro-conidia -, . , , . IT,- ,1 ^ from the interior of the and in low-lying localities the spores reach cushions, x ^i". (After maturity at the beginning of June. Xew ^' ^^^^^^-^ conidial cushions are not found on the larch in our neighbourhood before July. The parasite has thus four months at its disposal Stock Photo")
RMMCK6RM–. Hartig gives the following interesting facts on its distribution. ,, , , , 111 • 1 • 1 Fig. 103.—«, Rod-shaped As already remarked, the perithecia de- comdia before and after , . ,1 n 1^ ^ ^ -l^ detachment from the velop in spring on the lallen larch needles, basidia. b, Micro-conidia -, . , , . IT,- ,1 ^ from the interior of the and in low-lying localities the spores reach cushions, x ^i". (After maturity at the beginning of June. Xew ^' ^^^^^^-^ conidial cushions are not found on the larch in our neighbourhood before July. The parasite has thus four months at its disposal
RM2AN3832–Danish fungi as represented in the herbarium of ERostrup . Fig. 14: Cudoniella minima sp. nov., asci & sp. ^?^. - Fig. 15: Rutstroemia firma Fries,germinating ascospores ^. — Fig. 16-18: Beloniella brunellae Lind, hab.-p, sp. G. asci -p.Fig. 19: Scutularia multiguttulata Rostrup ^-t^. - Fig. 20-21: Scleroderris difformis Rostrup,perithecia^, asci 6. sp. ^. - Fig. 22: Samarospora potamogetonis Rostrup, asci ik sp.122.. Fig. 23-24: Myiocropon lycopodii Rostrup, on Lycopodium complanatum-j-, asc. 6.sp. *«. Fig. 25-26: Dothidea ribesia Fries i^ (see pag. 181). - Fig. 27-29: Dothidellageranii (
RMPG15NW–. Chestnut blight. Chestnut blight; Chestnut. Bui. 380, U. S. Dept of Agriculture. Plate XIV.. ENDOTHIA FLUENS. VERTICAL SECTIONS. X 49. Fig. 1 .—Simple Pycnidium with Very Little Stroma, from Italy. Fig. 2.—Stroma FROM Italy, Showing a Perithecium above a Pycnidium. Fig. 3.—Stroma from America, Showing a Mature Pycnidium and Perithecia Side by Side. Fig. 4.— Stroma, Showing a Single Pycnidium and Fundaments of Perithecia below.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illust
![. ^'^'^ fl,. fJ â Jf f^T .7'" VG.z,o.âSpliacros(ilbeflavid<i. i, leaf showing disease ; 2, section showing conidia form ; 3, surface view of white spot bear- ing conidial stage of fungus; 4, section showing perithecia ; 5, two perithecia; 6, ascus containing eiglit spores. Fig. i reduced ; remainder nmg. had been carefully packed, and arrived in a good condition for experimenting with. These were placed in Petri dishes on sterilised damp blotting-paper. At the expiration of seven weeks dense groups of minute, bright-red perithecia Stock Photo](https://c8.alamy.com/comp/MCTK54/fl-fj-jf-ft-7quot-vgzospliacrosilbeflavidlti-i-leaf-showing-disease-2-section-showing-conidia-form-3-surface-view-of-white-spot-bear-ing-conidial-stage-of-fungus-4-section-showing-perithecia-5-two-perithecia-6-ascus-containing-eiglit-spores-fig-i-reduced-remainder-nmg-had-been-carefully-packed-and-arrived-in-a-good-condition-for-experimenting-with-these-were-placed-in-petri-dishes-on-sterilised-damp-blotting-paper-at-the-expiration-of-seven-weeks-dense-groups-of-minute-bright-red-perithecia-MCTK54.jpg ". ^'^'^ fl,. fJ â Jf f^T .7'" VG.z,o.âSpliacros(ilbeflavid<i. i, leaf showing disease ; 2, section showing conidia form ; 3, surface view of white spot bear- ing conidial stage of fungus; 4, section showing perithecia ; 5, two perithecia; 6, ascus containing eiglit spores. Fig. i reduced ; remainder nmg. had been carefully packed, and arrived in a good condition for experimenting with. These were placed in Petri dishes on sterilised damp blotting-paper. At the expiration of seven weeks dense groups of minute, bright-red perithecia Stock Photo")
RMMCTK54–. ^'^'^ fl,. fJ â Jf f^T .7'" VG.z,o.âSpliacros(ilbeflavid<i. i, leaf showing disease ; 2, section showing conidia form ; 3, surface view of white spot bear- ing conidial stage of fungus; 4, section showing perithecia ; 5, two perithecia; 6, ascus containing eiglit spores. Fig. i reduced ; remainder nmg. had been carefully packed, and arrived in a good condition for experimenting with. These were placed in Petri dishes on sterilised damp blotting-paper. At the expiration of seven weeks dense groups of minute, bright-red perithecia
RM2AKB5BH–Memoirs . ertion of the primary appendage more characteristic than in fig. 91. Fig. 93. Tip of perithecium. Leitz, water im., oc. 4. Fig. 94. Typical male: water im., oc.4. Dimeromyces proximus Thaxter. Figs. 95 and 96. Two mature females. Figs. 97 and 98. Tips of perithecia from different angles: water im., oc. 4. Fig. 99. Male: water im., oc. 4. Dimeromyces Cryptici Thaxter. Figs. 100 and 101. Two females with one and two perithecia respectively.Fig. 102. Male. Dimeromyces Derispiae Thaxter.Fig. 103. Mature female.Fig. 104. Male. Dimeromyces Trycheri Thaxter. Fig. 105. Female with characteri
RMPG4GD4–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 191 Dimerosporium Fuckel (p. 189) Perithecia depressed-globose, membrano-carbonous; asci clavate to ovate, 8-spored; spores 2-celled, hyaline or brownish; mycelium abundant, dark, forming a film and often bearing conidia on conidiophores. D. mangiferum Sacc. does some harm to the mango. D. pulchrum, Sacc. grows upon the leaves of several woody plants, such as privet, Lonicera, Carpinus and Cornus. Conidia=Sarcinella heterospora. D. ct)llinsii (Schw.) Thiim., forms witches brooms on the service be
RMMCTPNN–. Fig. 4S.—Nec/ria solatii, figures illustrating its life-cycle, i, portion of a diseased tuber, and section through a conidial stroma ; 2, Monosporium fruit ; 3, conidia of same germinating ; 4, Fumrium stage, following the Mono^porium condition ; 5, Fusarium conidia, germinating and producing the Cephalosporiztin ?,ia.ge ; 6, stroma that has pro- duced Monosporium and Fusarhim conidia, bearing young perithecia, or the commence- ment of the ascigerous condition ; 7, section of a matureperithecium ; 8, asci containing spores, also paraphyses ; 9, ascospore germinating. The tuber in Fig. i redu
![Field studies on the dissemination and growth of the chestnut blight fungus [microform] . Inoculation with diseased bark.. Inoculation at the base of broken twigs. ? * ?? ^ A- . H fl ? ^ ?^???^Ih^ »--* Artificial wind inoculation with bellows. p^x. .j^i ^xg^^^Mu-^ O^B^^^^^^^H maSsM • •SV^^K.-^ i^^ j ^^H^^l W «^»va f ^MHj ? 1 ^^ ? - ^-Af .y^^K^ h HBB^?^ R*- j Testing the carrying power of the wind. Sterile plates exposed on tripod atthe right. Active perithecia on the upright logs at the left. Wind blow-ing from the logs toward the plates. Stock Photo](https://c8.alamy.com/comp/2AJ4HHJ/field-studies-on-the-dissemination-and-growth-of-the-chestnut-blight-fungus-microform-inoculation-with-diseased-bark-inoculation-at-the-base-of-broken-twigs-a-h-fl-ih-artificial-wind-inoculation-with-bellows-px-ji-xgmu-obh-massm-svk-i-j-hl-w-va-f-mhj-1-af-yk-h-hbb-r-j-testing-the-carrying-power-of-the-wind-sterile-plates-exposed-on-tripod-atthe-right-active-perithecia-on-the-upright-logs-at-the-left-wind-blow-ing-from-the-logs-toward-the-plates-2AJ4HHJ.jpg "Field studies on the dissemination and growth of the chestnut blight fungus [microform] . Inoculation with diseased bark.. Inoculation at the base of broken twigs. ? * ?? ^ A- . H fl ? ^ ?^???^Ih^ »--* Artificial wind inoculation with bellows. p^x. .j^i ^xg^^^Mu-^ O^B^^^^^^^H maSsM • •SV^^K.-^ i^^ j ^^H^^l W «^»va f ^MHj ? 1 ^^ ? - ^-Af .y^^K^ h HBB^?^ R*- j Testing the carrying power of the wind. Sterile plates exposed on tripod atthe right. Active perithecia on the upright logs at the left. Wind blow-ing from the logs toward the plates. Stock Photo")
RM2AJ4HHJ–Field studies on the dissemination and growth of the chestnut blight fungus [microform] . Inoculation with diseased bark.. Inoculation at the base of broken twigs. ? * ?? ^ A- . H fl ? ^ ?^???^Ih^ »--* Artificial wind inoculation with bellows. p^x. .j^i ^xg^^^Mu-^ O^B^^^^^^^H maSsM • •SV^^K.-^ i^^ j ^^H^^l W «^»va f ^MHj ? 1 ^^ ? - ^-Af .y^^K^ h HBB^?^ R*- j Testing the carrying power of the wind. Sterile plates exposed on tripod atthe right. Active perithecia on the upright logs at the left. Wind blow-ing from the logs toward the plates.
RMPG21RN–. A monograph of lichens found in Britain; being a descriptive catalogue of the species in the herbarium of the British Museum. Lichens. X loo â ^-^'â -o^'^a^-^^' X (100. X 600 MYCOPORELLUM OBSCURUM A. L. Sm. (/. Whole plant, b. Portion of thallus and perithecia. c. Vertical section of thallu.^. d. Vertical section of perithecia. e. Ascus and paraphyse.s. /. Spores.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. British M
RMMCK6RX–. Fig. 99.—Cucurbitaria laburni. A, Stroma with pycnidia containing minute unicellular conidia. B, One of the large smooth pycnidia. (After v. Tubeuf.) The mature perithecia have a peridiuin consisting of a loose pseudopareiichyma with a rough warty exterior and a pore set in a distinct depression (Fig. 100.) The paraphyses are long, strong threads, often branched, and between them arise the long cylindrical asci with rounded ends. The normal number of ascospores is eight in each ascus, but fewer is no exception. In addition to the forms already described, pycnidia of still another sort occur
RM2CE0382–. Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . Fig. 50.—Two adjacent Perithecia. X 50. j.
![. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 233 Hedgcock >" who recognizes several species as discoloring lumber. C. pilifera (Fr.) Wint." has been described in detail by von Schrenk as the cause of a blue color in pine wood."' Cyanospora Heald & Wolf (p. 232) Perithecia solitary or in clusters of two or three on stromatic nodules, immersed, horizontal; ostiole lateral, neck short; asci. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorat Stock Photo](https://c8.alamy.com/comp/PG4G4G/the-fungi-which-cause-plant-disease-plant-diseases-fungi-the-fungi-which-cause-plant-disease-233-hedgcock-gtquot-who-recognizes-several-species-as-discoloring-lumber-c-pilifera-fr-wintquot-has-been-described-in-detail-by-von-schrenk-as-the-cause-of-a-blue-color-in-pine-woodquot-cyanospora-heald-amp-wolf-p-232-perithecia-solitary-or-in-clusters-of-two-or-three-on-stromatic-nodules-immersed-horizontal-ostiole-lateral-neck-short-asci-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-colorat-PG4G4G.jpg ". The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 233 Hedgcock >" who recognizes several species as discoloring lumber. C. pilifera (Fr.) Wint." has been described in detail by von Schrenk as the cause of a blue color in pine wood."' Cyanospora Heald & Wolf (p. 232) Perithecia solitary or in clusters of two or three on stromatic nodules, immersed, horizontal; ostiole lateral, neck short; asci. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorat Stock Photo")
RMPG4G4G–. The fungi which cause plant disease . Plant diseases; Fungi. THE FUNGI WHICH CAUSE PLANT DISEASE 233 Hedgcock >" who recognizes several species as discoloring lumber. C. pilifera (Fr.) Wint." has been described in detail by von Schrenk as the cause of a blue color in pine wood."' Cyanospora Heald & Wolf (p. 232) Perithecia solitary or in clusters of two or three on stromatic nodules, immersed, horizontal; ostiole lateral, neck short; asci. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colorat
RMMCK6C8–. Fig. 10'. —Venturio. {Fti.dclodiv.m) dendritici-m forming br<mii .spijts on an apple; those still in the earlier' stages have a radiate margin and bear conidia. The enlarged section shows two rows of large-celled parenchyma of the apple, covered by a stroma of pseudoparenchyma bearing conidiophores and conidia. (v. Tubeuf del.) with warty prominences which grow on spots of leaf or fruit (Fig. 107). The perithecia (as yet described) are distinguislied by black bristles surrounding the pore, and occur on fallen leaves. The asci contain eight greenish ovoid spores with two or three cells. In
RM2CE0CRJ–. Endothia parasitica and related species . It*. -. mm ENDOTHIA GYROSA. VERTICAL SECTIONSBEECH. X32. OF STROMATA ON Fiq. 1.—Showing Numerous Pycnidial Cavities andTwo Mature Perithecia.Fig. 2.—Showing Mature Pycnidia and Perithecia Side by Side. Except where otherwise indicated, the photomicrographs of stromata are from unstainedsections cut with a freezing microtome. Bui. 380, U. S. Dept. of Agriculture. Plate XII.
RMPG4696–. The fungi which cause plant disease . Plant diseases; Fungi. 282 THE FUNGI WHICH CAUSE PLANT DISEASE Calosphseria. Tulasne (p. 281) Perithecia astromate, free or on the inner bark, scattered or clustered, ostiole more or less elongate; asci clavate, fasciculate; spores small, cylindric, curved, hyaline, continuous; paraphyses longer than the asci, stout lanceolate, evanescent. About thirty-five species chiefly saprophytes. C. princeps Tul. Perithecia on the inner bark in orbicular or elliptic groups, gen- erally densely crowded, globose, smooth and shining, necks long. Fig. 210.—Crypto- spor
RMMCKAA1–. Fig. 62. — Black-rot as it shows on the leaves. After Anderson. is mildewed soon ceases growth and falls, or develops ir- regularly and fails to ripen. The mildew fungus is strictly superficial and may be rubbed off, leaving a discolored spot. In late stages perithecia may be recognized as very small black bodies, about 0.1- 0.12 mm. in diameter, lying within the diseased areas. The disease develops in most destructive form in shaded, damp, poorly ventilated situations. Rain and fogs favor it, while very dry weather inhibits it. The American vines are less susceptible than the European varie
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