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Exoascus Stock Photos and Images
RM2APGBF9–Birch with witch broom Date: undated Keywords: trees, higher plants, damage, fungi Personal name: Exoascus betulini
RMEX8GFG–Galls on Sloe Prunus spinosa bushes called ‘pocket plums’ caused by the fungus Taphrina pruni
RME8DME9–Galls on Sloe Prunus spinosa bushes called ‘pocket plums’ caused by the fungus Taphrina pruni
RM2AKP6F6–Science-gossip . re mentioned in ComparativeMorphology and Biology of the Fungi, by DeBary ; Diseases of Plants induced by Crypto-gamic Parasites, by Tubeuf and Smith; and The Diseases of Trees, by Hartig, Englishtranslation by Somerville and Marshall Ward.The phenomenon is not alone caused by speciesof the Uredineae, but the Ascomycetes are alsoresponsible for some. Thus Exoascus deformans isresponsible for the witches brooms on Perslcavulgaris, Amygclalus covimunis, Prvnvs avinvi.P. eerasus, and P. domestica; Exoasciis insititiae-on Prvnvs insititia; E. carpini on Carpinns ietulus,and, I reg
RFCEGGCP–Diseases of plants. Publication of the book 'Meyers Konversations-Lexikon', Volume 7, Leipzig, Germany, 1910
![. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 156 ASCOMYCETES. Exoascus Rostrupianus Sad. This fungus causes " pockets " on Prunus spinosa (sloe) similar to the preceding species. According to Sadebeck, the asci in this case are more slender.. 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 origin Stock Photo](https://c8.alamy.com/comp/PG42T5/diseases-of-plants-induced-by-cryptogamic-parasites-introduction-to-the-study-of-pathogenic-fungi-slime-fungi-bacteria-amp-algae-plant-diseases-parasitic-plants-fungi-156-ascomycetes-exoascus-rostrupianus-sad-this-fungus-causes-quot-pockets-quot-on-prunus-spinosa-sloe-similar-to-the-preceding-species-according-to-sadebeck-the-asci-in-this-case-are-more-slender-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-origin-PG42T5.jpg ". Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 156 ASCOMYCETES. Exoascus Rostrupianus Sad. This fungus causes " pockets " on Prunus spinosa (sloe) similar to the preceding species. According to Sadebeck, the asci in this case are more slender.. 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 origin Stock Photo")
RMPG42T5–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 156 ASCOMYCETES. Exoascus Rostrupianus Sad. This fungus causes " pockets " on Prunus spinosa (sloe) similar to the preceding species. According to Sadebeck, the asci in this case are more slender.. 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 origin
RMW018C8–Archive image from page 68 of Die gallen der pflanzen, ein. Die gallen der pflanzen, ein lehrbuch für botaniker und entomologen diegallenderpfla00ks Year: 1911 Die a-allenerzeii2-enden Tiere und Pflanzen. 55 Ascomyceten. Das Interesse des Cecidologeu an den Ascomyceten beschränkt sich fast ganz anf die Exoascaceen, welche an Kryptogamen und Figur 13. Uredineengalle: Puccinia caricis (Schum.) 'Rehent. aut Urtica dioica (Äecidium Urticae) (Seh um.). Phanerogamen sehr verschiedenartige Grallen hervorrufen können ); Exoascus cerasi, E. carpini, E. hetiilinus (Fig. 47) u. a. erzeugen Hexen- pa
RMMCK6WX–. Fici. 0-.—Exoascus av.rtvs. Leaf of Popv.lv.s nUjra, showing the pistule-like swellings. Tubeuf del.) (V.
RM2ANER8H–Forest entomology . rom theappearance of the actual branch itself,seen in the South Kensington Museum,that the abnormal branch growths wereheavily covered with swollen buds in-fested by Eriophyinre. I had, in consequence of MissOrmerods description, for a long timeexamined many witches - brooms,without finding a single blind bud.The accompanying figure shows thefirst infested buds I discovered in any way closely associated witha birds nest. The orthodox opinion as to the cause of witches-broom or birds nest is that it results from a fungus inhabitingthe tissues, known as Exoascus. With referen
RMPG42NH–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 166 ASCOMYCETES. This is supported by Smith's investigations, in which an an- atomical comparison of diseased twigs of peach and almond showed no difference in the pathological effects. Exoascus crataegi Puck, occurs on Crataegus Oxyacantha^ and causes red swellings on the leaves and flowers, accom- panied by hypertrophy of shoots in which the mycelium perennates. Exoascus Tosquinetii (West). The deformation caused
RMW0568Y–Archive image from page 305 of Die gallen der pflanzen, ein. Die gallen der pflanzen, ein lehrbuch für botaniker und entomologen diegallenderpfla00ks Year: 1911 292 Sechstes Kapitel. des Reizfeldes werden. Sehr deutlich ist z. B. bei den Gallen von Exoascus Tosquineüi auf Alnus die Begrenzung der Gallen durch die Blattnerven erkennbar; seltener, dafür aber um so sinnfälliger ist die- selbe Wirkung der Blattnerven bei den Blattgallen des Exohasidium vaccimi auf Vaccinium vitis idaea erkennbar: an den vom Pilz durch- wucherten Teilen ist die Blattspreite enorm verdickt, jenseits des hemmenden
RMMCK6W9–. Fig. 6G.- Section of leaf hypertrophied by attack of Exoascus carntus; the asci of the fungus coat the upper epidermis. Di-awn with the same magnification as Fig. 65, for comparison. (After W. G. Smith.)
RM2AXKAWD–Ontario Sessional Papers, 1898-99, No.18-25 . Victoria. Sessional Papers (No. 18). A. 1899 the edges drawn toward each other. The affected portions of the leaf become pale greeD,parts being more or less strongly tinted with red and yellow. Fig. 8 represents the leavesof the peach as they appear when diseased by Exoascus. Fig. 9 A. young twig, 6,Leaf diseased—exact size. The parenchymatous, or soft tissue of the affected leaves, isstimulated to an abnormal growth, causing the leaf to bulge out on one side. The firstcrop of leaves usually falls, and is generally followed by a second. Frequently
RMPG42MM–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fig. 65.—Section of normal leaf of Betula odorata. (After W. G. Smith.). Fig. 66.—Section of leaf hypertropbied by attack of Exoascus carneus; the asci of the fungus coat the upper epidermis. Drawn with the same magnification as Fig. 65, for comparison. (After W. G. Smith.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and app
RMW028BJ–Archive image from page 126 of Die gallen der pflanzen, ein. Die gallen der pflanzen, ein lehrbuch für botaniker und entomologen diegallenderpfla00ks Year: 1911 Morphologie der Gallen. 13 suaveolensj auf Berheris vulgaris als Hexenbesenerzeuger zu nennen; Puccinia Rühsaameni ruft ähnliche Gebilde an Origanum, P. Schneiden an Thymus, Aecidium Acaciae an Acacia ethaica hervor usw. Von den Usti- 1 ag- i n e e n erzeugt Ustilago Vriesiana nach Vuillemin Hexenbesen auf verschiede- nen Myrtaceen. Die Hexen- besenbildner par excellence sind unter den Pilzen die Exoascaceen (Exoascus Cerasi an Prunu
RMMEE69M–. Die gallen der pflanzen, ein lehrbuch für botaniker und entomologen . Figur 63. Blasonförmiges Mycocecidium: Exoascus Tosquinetii auf Alnus. HouARD, Catalogue Nr. 4062. Ibid. Nr. 3981.
RM2ANCCB7–A text-book of mycology and plant pathology . B Fig. 42.—Exoascus and Taphrina. A-F, Exoascus pruni, A. Appearance ondiseased twig; B, cross-section of diseased fruirt; C, mycelium in tissues of host; D,young asci; E, mature ascus with spores; F, germination of spores; G, E, Exoascusalnitorquus; H, Taphrina aurea, ripe and unripe asci; J, Taphrina Sadebeckii. SeeDie naturlichen Pflanzenfamilien I. i, p. 159. crammed full of them (Fig. 42). The ascospores are generally ellip-soidal and always one-celled with colorless, yellow, or orange contents.The perennial mycelium is responsible for the f
RMPG49YP–. Nature study and life. Nature study. 464 NATURE STUDY AxD LIFE Peach-Leaf Curl, Exoascus defor?nans. — By attacking the leaves, blossoms, and growing twigs of the peach this fungus sometimes causes the loss of the entire crop, and great damage to the trees. If present in the neighborhood, the pupils will have no difficulty in finding specimens for study. Peach-leaf curl is so easily prevented by spraying that there is no e-xcuse for allowing an orchard to be affected by it. Peach Yellows. — No fungus has been discovered in connection with this disease, although it has been sought for with g
RMW16DNE–Archive image from page 260 of Die Krankheiten der Pflanzen; ein. Die Krankheiten der Pflanzen; ein Handbuch für Land- und Forstwirte, Gärtner, Gartenfreunde und Botaniker . diekrankheitend02fran Year: 1895 10. Kapitel; Gymnoasci 245 buxd) hie f)erDorbre(f)enben 5ci gelblid) fid) färben. 2)ie tieljelle ber leteren bringt xüdjt 3iinid)en bie (Spibermisseüen ein. 6. Taphrina turida Saiüd. (Exoascus turgidus Sac/el>.), auf Betula alba bie fogenannten .pejrenbefen ober Sonnerbefen erjeugenb, aUjärlid) fid) oergröBernbe bid)tc iifliiudiernngen, bie fid) fomoll auf nroBeu 33äumen alö auf ftraudj
RMMCK6X6–. Fig. 54.—Exoascus epiphyllus. Witches' broom in first year, showing swelling at the point of infec- tion. The leaves are already shed in autumn, while the normal still remain 1 natural .size. After V. Tubeuf.)
RM2AN3N64–Danish fungi as represented in the herbarium of ERostrup . mountains. O. Rostrup found it atHerlufsholm in Septbr. 78, from where it has been distributed inThiimens Mycotheca No 1366 under the name of Exoscus alni de By.var. strobilinus Thiim. Alnus glutinosa common. Alnus incana. Samsa Brattingsborg (Exc. ^^h 87);S. Gauno (F. W.); L. Knuthcnborg; B. Aakirkeby (Jonathan Lange). 170. Taphrina epiphylla Sadeb., Syll. VIII «^^ R 91 b ^^^ 6.02 a Syn: Exoascus epiphyllus Sadeb. Wt. II°. The fungu.*) makes its presence conspicuous by the large, but notdense witches-brooms which it produces on the t
RMPG42NK–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fig. (il.—Exoascus dej'or^nans. Comparison of normal section of leaf of Pvv,nus Persica with a hypertrophied one, B; in the latter the mycelial hyphae have been slightly shaded. The sections are from different parts of the same leaf, and are drawn with the same magnification. (After W. G. Smith.) on the almond {Amygdalus communis)^ resembles Ex. deformans so closely that they are now regarded as the same species.. P
RMW03R54–Archive image from page 215 of Die gallen der pflanzen, ein. Die gallen der pflanzen, ein lehrbuch für botaniker und entomologen diegallenderpfla00ks Year: 1911 Figur 98. Degenerative Veränderungeu an Zellkernen: a, Lösung der Kemmembranen, Albugo Candida auf CapseUa bursa pastoris; b, Umwandlung des Zellkerns in ein querwandUhnliches Septum, Exoascus amentorwm auf Alnus incana (nach Guttenberg). muß auf die Arbeiten von W. Magnus und Shibata verwiesen werden (s. u.). Lösung der Zellenkerne beobachtete Guttenberg in den Gallen von Albugo Candida (auf CapseUa bursa pastoris, vgl. Fig. 98 a).
![. Fio. 49.—Exoascus pruni. Malformed Plums—"pocket plums"; one which is cut shows the rudimentary stone. * natural si/.e. (v. Tubeuf phot.) Fio. 50.—Exoascus pruni on twig of Pr Padus (at end of July). Four of the ov are malformed, (v. Tubeuf del.) Stock Photo](https://c8.alamy.com/comp/MCK6HF/fio-49exoascus-pruni-malformed-plumsquotpocket-plumsquot-one-which-is-cut-shows-the-rudimentary-stone-natural-sie-v-tubeuf-phot-fio-50exoascus-pruni-on-twig-of-pr-padus-at-end-of-july-four-of-the-ov-are-malformed-v-tubeuf-del-MCK6HF.jpg ". Fio. 49.—Exoascus pruni. Malformed Plums—"pocket plums"; one which is cut shows the rudimentary stone. * natural si/.e. (v. Tubeuf phot.) Fio. 50.—Exoascus pruni on twig of Pr Padus (at end of July). Four of the ov are malformed, (v. Tubeuf del.) Stock Photo")
RMMCK6HF–. Fio. 49.—Exoascus pruni. Malformed Plums—"pocket plums"; one which is cut shows the rudimentary stone. * natural si/.e. (v. Tubeuf phot.) Fio. 50.—Exoascus pruni on twig of Pr Padus (at end of July). Four of the ov are malformed, (v. Tubeuf del.)
RM2CDGKH1–. Allgemeine Pflanzenkaryologie . Fig. 82. Fritillariaimperialis. Embryo-sackwandbeleg. Ein-seitige Lagerung der Nucleolen. Vergr. 400.(Nach V. Derschau.) Der Ruhekern als Componeute des lebendigen Zellganzen 165 Ganz unzweifelhaft sind doch z. B. die qiierwandähnlicheu Septen inden Exoascus-Gallen auf Alnus incana, die nach Degeneration desKerns entstanden (V. Guttenberg 1905), der Anfang des Zellentodes.Und Ähnliches beschreibt Spratt (1912 b, S. 807) von den Wurzel-knöUchen bei Podocarpus, wo in gewissen Zellen „numerous cellulosebars on the walls of the cells auftreten, „which gives theni
![. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fia. 49.—ExotLscus pruni. Miilforraed Plums—"pocket plums" ; one which is cut shows the rudimentary stoue. ^ natural size. (v. Tubeuf phot.) Fig. 50.—Exoascus pruni on twig of Prunus Padua (at end of July). Four of the ovaries- are malformed, (v. Tuheuf deL). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearanc Stock Photo](https://c8.alamy.com/comp/PG42RY/diseases-of-plants-induced-by-cryptogamic-parasites-introduction-to-the-study-of-pathogenic-fungi-slime-fungi-bacteria-amp-algae-plant-diseases-parasitic-plants-fungi-fia-49exotlscus-pruni-miilforraed-plumsquotpocket-plumsquot-one-which-is-cut-shows-the-rudimentary-stoue-natural-size-v-tubeuf-phot-fig-50exoascus-pruni-on-twig-of-prunus-padua-at-end-of-july-four-of-the-ovaries-are-malformed-v-tuheuf-del-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearanc-PG42RY.jpg ". Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fia. 49.—ExotLscus pruni. Miilforraed Plums—"pocket plums" ; one which is cut shows the rudimentary stoue. ^ natural size. (v. Tubeuf phot.) Fig. 50.—Exoascus pruni on twig of Prunus Padua (at end of July). Four of the ovaries- are malformed, (v. Tuheuf deL). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearanc Stock Photo")
RMPG42RY–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fia. 49.—ExotLscus pruni. Miilforraed Plums—"pocket plums" ; one which is cut shows the rudimentary stoue. ^ natural size. (v. Tubeuf phot.) Fig. 50.—Exoascus pruni on twig of Prunus Padua (at end of July). Four of the ovaries- are malformed, (v. Tuheuf deL). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearanc
RMW16DCP–Archive image from page 259 of Die Krankheiten der Pflanzen; ein. Die Krankheiten der Pflanzen; ein Handbuch für Land- und Forstwirte, Gärtner, Gartenfreunde und Botaniker . diekrankheitend02fran Year: 1895 244 I. 3(bjd)nitt: arafltifcf)e .e Auf Alous glatinosa. bilbiiiuion bor .aMxnjdiuppcn I)en'»or, unc bor .)oncc au bor i-omeinen (iTlo. Dad) 3abobcit ijt bao oino folüftanbiie xi, iüeld)e [id) biird) baö 5cl)lou einer abiicirensten SticlcUo ber Slöci untcrfd)oibct. 3. Taphrina Sadobecki Jo/ians. (Exoascus flavus S(uül>.). 2)icfe frrif)cr mit ber orft c3enannton uorincd;[clte 5irt oroi
RMMCK70R–. '^•^^*?icrfj?ix' Fig. Z.—Exoascus cerasi. Witches' broom of cherry. The supporting branch is dead from its apex backwards to the seat of aninfected lateral bud, which has developed into a witches' broom. On the tree the supporting branch pointed slightly more downwards than is shewn. J natural size. (v. Tubeuf phot.)
RM2CDA0KG–. Report of observations of injurious insects and common farm pests, during the year ... : with methods of prevention and remedy . hytoptus ribis 43 Woolly Currant Scale Pulvinaria ribesUe 48 Mustard. Gamma or Silver Y-Moth . . Pbisia gamma 53 Pear. Pear Leaf-blister Mites .... Phyloptvs pyri 59 Pear Gnat Midge Diplosis pyrivora 63 Plum. Splint or Sap-wood Beetle . . Scolytus pruni 69 Mottled Fruit-tree Tortrix Moth . Penthina varieyana 73 Pocket or Bladder Plums . . Exoascus pruni * 76 Potato. Deaths-head Moth Acherontia atropos 82 Raspberry. Raspberry Stem-bud Moth . . Lampronia rubiella 85
![. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. THE PARASITIC EXOASCEAE. 155 >Yhile the stone, including the embryo, remains stunted. (Fig. 49.) The "pocket-plums" (fools or bladder-plums) dry up, and remain hanging on the tree till autumn. De Bary found on the plum a withering of calyx and stamens resulting from the development of the hymenium of this Exoascus; on the bird cherry, according to Magnus and Wakker, enlargement of the stamens occurs. So Stock Photo](https://c8.alamy.com/comp/PG42T9/diseases-of-plants-induced-by-cryptogamic-parasites-introduction-to-the-study-of-pathogenic-fungi-slime-fungi-bacteria-amp-algae-plant-diseases-parasitic-plants-fungi-the-parasitic-exoasceae-155-gtyhile-the-stone-including-the-embryo-remains-stunted-fig-49-the-quotpocket-plumsquot-fools-or-bladder-plums-dry-up-and-remain-hanging-on-the-tree-till-autumn-de-bary-found-on-the-plum-a-withering-of-calyx-and-stamens-resulting-from-the-development-of-the-hymenium-of-this-exoascus-on-the-bird-cherry-according-to-magnus-and-wakker-enlargement-of-the-stamens-occurs-so-PG42T9.jpg ". Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. THE PARASITIC EXOASCEAE. 155 >Yhile the stone, including the embryo, remains stunted. (Fig. 49.) The "pocket-plums" (fools or bladder-plums) dry up, and remain hanging on the tree till autumn. De Bary found on the plum a withering of calyx and stamens resulting from the development of the hymenium of this Exoascus; on the bird cherry, according to Magnus and Wakker, enlargement of the stamens occurs. So Stock Photo")
RMPG42T9–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. THE PARASITIC EXOASCEAE. 155 >Yhile the stone, including the embryo, remains stunted. (Fig. 49.) The "pocket-plums" (fools or bladder-plums) dry up, and remain hanging on the tree till autumn. De Bary found on the plum a withering of calyx and stamens resulting from the development of the hymenium of this Exoascus; on the bird cherry, according to Magnus and Wakker, enlargement of the stamens occurs. So
RMT1HG53–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 15G ASCOMYCKTES. Exoascus Rostrupianus Sad. This fungus causes ' pockets ' on rn/ni/,s spitiosa (sloe) similar to the preceding species. According to Sadebeck, the asci in this case are more slender.
![. Fig. 49.—Exoascus pruni. Malformed Plums—"pocket plums"; one which is cut shows the rudimentarj- stone. i- natural size. (v. Tubeuf phot.) Fig. 50.—Exoascus prv.ni on twig of Pruni'.s Padv.s (at end of July). Four of the ovaries are malformed, (v. Tubeuf del.) Stock Photo](https://c8.alamy.com/comp/MCK5MA/fig-49exoascus-pruni-malformed-plumsquotpocket-plumsquot-one-which-is-cut-shows-the-rudimentarj-stone-i-natural-size-v-tubeuf-phot-fig-50exoascus-prvni-on-twig-of-prunis-padvs-at-end-of-july-four-of-the-ovaries-are-malformed-v-tubeuf-del-MCK5MA.jpg ". Fig. 49.—Exoascus pruni. Malformed Plums—"pocket plums"; one which is cut shows the rudimentarj- stone. i- natural size. (v. Tubeuf phot.) Fig. 50.—Exoascus prv.ni on twig of Pruni'.s Padv.s (at end of July). Four of the ovaries are malformed, (v. Tubeuf del.) Stock Photo")
RMMCK5MA–. Fig. 49.—Exoascus pruni. Malformed Plums—"pocket plums"; one which is cut shows the rudimentarj- stone. i- natural size. (v. Tubeuf phot.) Fig. 50.—Exoascus prv.ni on twig of Pruni'.s Padv.s (at end of July). Four of the ovaries are malformed, (v. Tubeuf del.)
RMRM7HB3–. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Plate XV.—Exoascus rhizipes Atkinson {on P. triflora Roxburgh).. 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.. Cornell University. Agricultural Experiment Station. Ithaca, N. Y. : The University
RMPG42ND–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. THK PARASITIC EXOASCP^AE. 16T Exoascus coerulescens (Mont, et Desm.) produces similar blisters on oak leaves.. Fig. 63.—JExoctscus aureus. Leaf section from the margiu of a swelling, showing normal and hypertropbied tissue. The cells of the swelling are abnormally elongated with thickened walls, and some show secondary cell-division. The bases of the asci are wedged in between the cells; one ascus is shown with coni
RMT1HG8P–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 15G ASCOMYCETES. Exoascus Rostrupianus Sad. This fungus causes ' pockets ' on Frunus spinosa (slue) similar to the preceding species. According to Sadebeck, the asci in this case are more slender.
![. Pio. 49.—Exoascus 'prwui. Malformed Plums—"pocket plums"; one which is cut shows the rudimentary stone. 4 natural si/.e. (v.'Tubeuf phot.) Fici. 50.—Exoascus prv.ni on twig of Prvnv.s Padvs (at end of July). Four of the ovaries- are m.alformed. (v. Tubeuf del.) Stock Photo](https://c8.alamy.com/comp/MCK6X3/pio-49exoascus-prwui-malformed-plumsquotpocket-plumsquot-one-which-is-cut-shows-the-rudimentary-stone-4-natural-sie-vtubeuf-phot-fici-50exoascus-prvni-on-twig-of-prvnvs-padvs-at-end-of-july-four-of-the-ovaries-are-malformed-v-tubeuf-del-MCK6X3.jpg ". Pio. 49.—Exoascus 'prwui. Malformed Plums—"pocket plums"; one which is cut shows the rudimentary stone. 4 natural si/.e. (v.'Tubeuf phot.) Fici. 50.—Exoascus prv.ni on twig of Prvnv.s Padvs (at end of July). Four of the ovaries- are m.alformed. (v. Tubeuf del.) Stock Photo")
RMMCK6X3–. Pio. 49.—Exoascus 'prwui. Malformed Plums—"pocket plums"; one which is cut shows the rudimentary stone. 4 natural si/.e. (v.'Tubeuf phot.) Fici. 50.—Exoascus prv.ni on twig of Prvnv.s Padvs (at end of July). Four of the ovaries- are m.alformed. (v. Tubeuf del.)
RMRM7J4W–. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Plate l.—Prunus persica (Z.), Peach. {Exoascus deformans {B.) Fuckel.). 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.. Cornell University. Agricultural Experiment Station. Ithaca, N. Y. : The University
RMPFCPYM–. Department bulletin. BULL. 20, DIV. VEQ. PHY8. & PATH., U. 8. DEPT. AGRICULTURE. PLATE IV.. Xcwtdii H. l'it-r< F iiil.nat del GERMINATION OF THE SPORES OF EXOASCUS DEFORMANS. A.Ko.^11 *;. r<,. Lilli. Balliiuorf.. 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.. United States. Dept. of Agriculture; Patterson, Flora. Mushrooms . .; Pierce, Newton Barris. Peach leaf curl . .. Washington, Govt. Print. Off.
RMT1HGNF–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 Fig. 6-5.—Section of nomial leaf of Betuta odorata. (After W. G. Smith.) Fig. 6G.- Section of leaf hypertrophied by attack of Exoascus carntus; the asci of the fungus coat the upper epidermis. Di-awn with the same magnification as Fig. 65, for comparison. (After W. G. Smith.)
![. Flu. .01.—Exoascus prvni. Young twigs of Plum, showing effects of mycelium. The shoots are swollen and distorted, one disea.sed leaf remains hypertrophled and much crumpled; ou one spur a norm.al and a "pocket" plum are borne. Specimens from the Museum at Geisenheim. J natural size. (v. Tubeuf phot.) Stock Photo](https://c8.alamy.com/comp/MCK6X7/flu-01exoascus-prvni-young-twigs-of-plum-showing-effects-of-mycelium-the-shoots-are-swollen-and-distorted-one-diseased-leaf-remains-hypertrophled-and-much-crumpled-ou-one-spur-a-normal-and-a-quotpocketquot-plum-are-borne-specimens-from-the-museum-at-geisenheim-j-natural-size-v-tubeuf-phot-MCK6X7.jpg ". Flu. .01.—Exoascus prvni. Young twigs of Plum, showing effects of mycelium. The shoots are swollen and distorted, one disea.sed leaf remains hypertrophled and much crumpled; ou one spur a norm.al and a "pocket" plum are borne. Specimens from the Museum at Geisenheim. J natural size. (v. Tubeuf phot.) Stock Photo")
RMMCK6X7–. Flu. .01.—Exoascus prvni. Young twigs of Plum, showing effects of mycelium. The shoots are swollen and distorted, one disea.sed leaf remains hypertrophled and much crumpled; ou one spur a norm.al and a "pocket" plum are borne. Specimens from the Museum at Geisenheim. J natural size. (v. Tubeuf phot.)
RMRH18RJ–. Bulletin. Plant diseases -- United States. BULL. 20, DIV. VEG. PHYS. & PATH., U. S. DEPT. AGRJCULTURE. PLATE III.. FRUITING STAGES OF EXOASCUS DEFORMANS. â ^-Hoffn A- Co.LitJi. Kiiltiniore.. 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.. United States. Division of Vegetable Physiology and Pathology. Washington : G. P. O.
RMPG42N6–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fig. 63.—JExoctscus aureus. Leaf section from the margiu of a swelling, showing normal and hypertropbied tissue. The cells of the swelling are abnormally elongated with thickened walls, and some show secondary cell-division. The bases of the asci are wedged in between the cells; one ascus is shown with conidia. (v. Tubeuf del.) Exoascus cameus Johan. occurs on leaves of Betula odorata, B. nana, and B. intermedia. Th
RMT1HG54–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 Pio. 49.—Exoascus 'prwui. Malformed Plums—'pocket plums'; one which is cut shows the rudimentary stone. 4 natural si/.e. (v.'Tubeuf phot.) Fici. 50.—Exoascus prv.ni on twig of Prvnv.s Padvs (at end of July). Four of the ovaries- are m.alformed. (v. Tubeuf del.)
RMMCK6H1–. Fig. 56.— Witcha' Broom of the Cheny. Exoascus cerasi on Prunus Cenmus. The whole left side forms a large broom. A smaller example occupies the summit of the crown, while another hangs do^^^lwards to the right. In winter condition, (v. Tubeuf phot.) The mycelium of Re. nanus hibernates in twigs, and penetrates L
RMRM7HP4–. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Plate VII.—Prtimcs virgiiiiana L., choke cherry {Exoascus cecidornophilus Atkinson in fruits deformed by cecidomid larvis.. 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.. Cornell University. Agricultural Experiment Station. Ithaca, N. Y. : The University
RMPG3YWH–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. ASCOMYCETES iSl development of short, modified hyphal cells (Fig. 66, d). These are properly the ascogenous cells, which by an abundant budding process form frequently an almost continuous layer beneath the cuticle. The asci develop from these ascogenous cells, as upward prolongations, pushing through the cuticle, while the original ascogenous cell is finally cut off by a cross wall as a stalk or foot. Fig. 66. Exoascus on Peach: Asci, Germinating Spores, and Hyph^e (6, c, and d af
RMT1HGJ4–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 THE PARASITIC EXOASCEAE. 165 Exoascus deformans (Berk.) causes the ' curl disease ' of the peacli {Frrsica vtilgaris), and may inflict ijreat injury. The Fio. tiO.—E.'oaicas ininor. Curl disease of Cherry. mycelium hibernates in bark, pith, and medullary rays of twigs, 50 that it reappears each year. An U'vasciis, wliich occurs
![. Fio. 51.—Exoascus proni. Young twig.s of Plum, showing effects of mycelium. The shoots are swollen and distorted, one diseased leaf remains hypertrophied and much crumpled; on one spur a norm.al and a "pocket" plum are borne. Specimens from the Museum at Geisenheim. natural size. (v. Tubeuf phot.) Stock Photo](https://c8.alamy.com/comp/MCK5M8/fio-51exoascus-proni-young-twigs-of-plum-showing-effects-of-mycelium-the-shoots-are-swollen-and-distorted-one-diseased-leaf-remains-hypertrophied-and-much-crumpled-on-one-spur-a-normal-and-a-quotpocketquot-plum-are-borne-specimens-from-the-museum-at-geisenheim-natural-size-v-tubeuf-phot-MCK5M8.jpg ". Fio. 51.—Exoascus proni. Young twig.s of Plum, showing effects of mycelium. The shoots are swollen and distorted, one diseased leaf remains hypertrophied and much crumpled; on one spur a norm.al and a "pocket" plum are borne. Specimens from the Museum at Geisenheim. natural size. (v. Tubeuf phot.) Stock Photo")
RMMCK5M8–. Fio. 51.—Exoascus proni. Young twig.s of Plum, showing effects of mycelium. The shoots are swollen and distorted, one diseased leaf remains hypertrophied and much crumpled; on one spur a norm.al and a "pocket" plum are borne. Specimens from the Museum at Geisenheim. natural size. (v. Tubeuf phot.)
RMRM7J00–. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Plate IV.—Primus angustifolia Marshall, Chickasaw plum ( Exoascus mirabilis Atkinson var. tortilis Atkinson in plums).. 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.. Cornell University. Agricultural Experiment Station. Ithaca, N. Y. : The University
RMPG3FJ0–. A textbook of botany for colleges and universities ... Botany. 784 ECOLOGY trees (as the white birch, the hackberry, and various conifers) by Exoascus and by other fungi, and by the dwarf mistletoe, Arceuthobiutn pusillum. In these galls many small twigs diverge from the part infected, thus manifesting a resemblance to a broom or brush. In the case of Exoascus the mycelium hibernates, so that the fungus recurs season after season. Other important fungus galls are: the black knot of the cherry (caused by Plcrwrightia, fig. iioo); the ergot of rye and other. y^ 1100 Figs. 1097-1100. — 1097-109
RMT1HGNM–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 THE PARASITIC EXOASCKAE, 167 Exoascus coerulescens (Mont, et Desm.) produces similar blisters on oak leaves. Flu. 63.—Exoascus aureus. Leaf section from the margiu of a swelling, showing normal and hypertrophied tissue. The cells of the swelling are abnormally elongated with thickened walls, and some show secondary cell-division. The bases of the asei are wedged in between the cells; one ascus is s
RMMCK6X2–. Fig. 56.— Witches' Broom of the Cherry. Exoascus cerasi on Prv.nus Cerasus. The whole left side forms a large broom. A smaller example occupies the summit of the crown, while another hangs downwards to the right. In winter condition. (v. Tubeuf phot.) The mycelium of Ux. nanus hibernates in twigs, and penetrates L
RMREF90C–. Comparative morphology of Fungi. Fungi. 164 COMPARATIVE MORPHOLOGY OF FUNGI Because of this variation in the subordinate characters and the similarity of the more important characters, the systematic classification of the Taphrinales is confused. For a time, the forms with 4- or 8- spored asci were placed in Exoascus, the forms in which the germination of ascospores to sprout mycelium occurs in the asci in Taphrina (Sade- beck, 1884). This distinction has been shown untenable however, and consequently both genera must be united; for this the name Taphrina possesses priority. The forms in whi
![. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fia. 49.—ExotLscus pruni. Miilforraed Plums—"pocket plums" ; one which is cut shows the rudimentary stoue. ^ natural size. (v. Tubeuf phot.) Fig. 50.—Exoascus pruni on twig of Prunus Padua (at end of July). Four of the ovaries- are malformed, (v. Tuheuf deL). Fig. 51.—Exoascus pintni. Young twigs of Plum, showing effects of mycelium. The shoots are swollen and distorted, one diseased leaf remains hypertrop Stock Photo](https://c8.alamy.com/comp/PG42RM/diseases-of-plants-induced-by-cryptogamic-parasites-introduction-to-the-study-of-pathogenic-fungi-slime-fungi-bacteria-amp-algae-plant-diseases-parasitic-plants-fungi-fia-49exotlscus-pruni-miilforraed-plumsquotpocket-plumsquot-one-which-is-cut-shows-the-rudimentary-stoue-natural-size-v-tubeuf-phot-fig-50exoascus-pruni-on-twig-of-prunus-padua-at-end-of-july-four-of-the-ovaries-are-malformed-v-tuheuf-del-fig-51exoascus-pintni-young-twigs-of-plum-showing-effects-of-mycelium-the-shoots-are-swollen-and-distorted-one-diseased-leaf-remains-hypertrop-PG42RM.jpg ". Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fia. 49.—ExotLscus pruni. Miilforraed Plums—"pocket plums" ; one which is cut shows the rudimentary stoue. ^ natural size. (v. Tubeuf phot.) Fig. 50.—Exoascus pruni on twig of Prunus Padua (at end of July). Four of the ovaries- are malformed, (v. Tuheuf deL). Fig. 51.—Exoascus pintni. Young twigs of Plum, showing effects of mycelium. The shoots are swollen and distorted, one diseased leaf remains hypertrop Stock Photo")
RMPG42RM–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fia. 49.—ExotLscus pruni. Miilforraed Plums—"pocket plums" ; one which is cut shows the rudimentary stoue. ^ natural size. (v. Tubeuf phot.) Fig. 50.—Exoascus pruni on twig of Prunus Padua (at end of July). Four of the ovaries- are malformed, (v. Tuheuf deL). Fig. 51.—Exoascus pintni. Young twigs of Plum, showing effects of mycelium. The shoots are swollen and distorted, one diseased leaf remains hypertrop
RMT1H5KY–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 EFFECT OF PARASITIC FUxGI ON THEIR HOST. 19 '•*?icrfj?ix' Fig. Z.—Exoascus cerasi. Witches' broom of cherry. The supporting branch is dead from its apex backwards to the seat of aninfected lateral bud, which has developed into a witches' broom. On the tree the supporting branch pointed slightly more downwards than is shewn. J natural size. (v. Tubeuf phot.)
RMMCKX8H–. Fk;. 35.—Exoascus alni-incanae, causing enlarged scales of alder catkins. to a pink or red colour, and are more or less curled up. The surface is covered with a delicate white bloom when the spores arc produced. Diseased leaves soon diu and decay. The mycelium hibernates in the buds. As the mycelium is perennial in the living plant, pruning all diseased shoots is the only remedy.
![. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 156 ASCOMYCETES. Exoascus Rostrupianus Sad. This fungus causes " pockets " on Prunus spinosa (sloe) similar to the preceding species. According to Sadebeck, the asci in this case are more slender.. 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 origin Stock Photo](https://c8.alamy.com/comp/RDC2FF/diseases-of-plants-induced-by-cryptogamic-parasites-introduction-to-the-study-of-pathogenic-fungi-slime-fungi-bacteria-amp-algae-plant-diseases-parasitic-plants-fungi-156-ascomycetes-exoascus-rostrupianus-sad-this-fungus-causes-quot-pockets-quot-on-prunus-spinosa-sloe-similar-to-the-preceding-species-according-to-sadebeck-the-asci-in-this-case-are-more-slender-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-origin-RDC2FF.jpg ". Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 156 ASCOMYCETES. Exoascus Rostrupianus Sad. This fungus causes " pockets " on Prunus spinosa (sloe) similar to the preceding species. According to Sadebeck, the asci in this case are more slender.. 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 origin Stock Photo")
RMRDC2FF–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 156 ASCOMYCETES. Exoascus Rostrupianus Sad. This fungus causes " pockets " on Prunus spinosa (sloe) similar to the preceding species. According to Sadebeck, the asci in this case are more slender.. 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 origin
RMPG4CJ1–. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. 92 DIVISION I.—GENERAL MORPHOLOGY. upwards to a height of 1-2 cm., in Exoascus Pruni of i cm.; in the strongly puffing Fungi, such as Peziza vesiculosa, P. Acetabulum, Helvella crispa, and Asco- bolus furfuraceus, they are thrown to a distance of more than 7 cm., in Sordaria fimiseda, according to Woronin, they travel 15 cm., in the smaller species of this genus about 2 cm., in Rhytisma acerinum only a few millimetres. The movements in the act of puffing in large hyme
RMT1HGB0–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 160 ASCOMYCETES. * Witches' brooms on birch are very common in Scotland. They appear as tangled masses of twigs, which at first sight give the impression of some bird's nest. I have frequently examined the leaves borne on these brooms, and have never failed to find the asci of an Exoascus. Sadebeck gives in his monograph the two above-named species as found on birches bearing v.itches' brooms. Mites {
RMMCK6X5–. Fig. 57.—Exoascus cerasi on Prunus droius. Cherry-tree iii blossom, with the exception of four witches' brooms. The tree is as yet leafless except the brooms, which are in full foliage and show up dark. (v. Tubeuf phot.; Exoascus carpini Eostr. is common on Carpinus Beiulus (horn- beam) (Fig. 55). The brooms produced are bushy and densely leafed; the twigs are thickened and much branched; the leaves
RMRH18T0–. Bulletin. Plant diseases -- United States. BULL. 20, DIV. VEG. PHYS. &. PATH., U. S. DEPT. AGRICULTURE. PLATE. MYCELIUM OF EXOASCUS DEFORMANS, THE FUNGUS CAUSING PEACH LEAF CURL. A.Hnen K- Co. I,Uh . Balfmior.-.. 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.. United States. Division of Vegetable Physiology and Pathology. Washington : G. P. O.
RMPG42MX–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fig. 64.—Exoascus cai-neus on Betula odorata. (v. Tubeuf del.). Fig. 65.—Section of normal leaf of Betula odorata. (After W. G. Smith.). 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.. Tubeuf, Karl, freiherr von, 1862-1941; Smith, William G. Lond
RMT1HG32–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 THE PARASITIC EXOASCEAE. 155 while the stone, including the embryo, remains stunted. (Fig. 49.) The 'pocket-plums' (fools or bladder-plums) dry up, and remain hanging on the tree till autumn. De Bary found on the plum a withering of calyx and stamens resulting from the development of the hymenium of this Exoascus; on the bird cherry, according to Magnus and Wakker, enlargement of the stamens occurs. S
RMMCKXMN–. 1- iij. j4. Witches' brooms of birch, produced by Exoascus turgidus. Reduced. birch-tree in Kew Gardens. One of the brooms measured two yards in diameter, and when removed was found to con- tain seven nests, belonging respectively to blackbirds and thrushes. On this broom some of the more elongated branches bore clusters of buds forming miniature brooms, caused by the mite Eriophyes rudis. Unless considered ornamental, the brooms should be
RMRDC2B6–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 166 ASCOMYCETES. This is supported by Smith's investigations, in which an an- atomical comparison of diseased twigs of peach and almond showed no difference in the pathological effects. Exoascus crataegi Puck, occurs on Crataegus Oxyacantha^ and causes red swellings on the leaves and flowers, accom- panied by hypertrophy of shoots in which the mycelium perennates. Exoascus Tosquinetii (West). The deformation caused
RMPG42R0–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. THE PARASITIC EXOASCEAE. 161 Exoascus alpinus Johan. and Ex. nanus Johan. Both occur on Betula nana, and induce formation of hypertrophied twigs.. Fig. 56.— Witches' Broom of the Cherry. Exoascus cerasi oa Prunus Cerasus. The whole left side forms a large broom. A smaller example occupies the summit of the crown, while another hangs downwards to the right. In winter condition. (t. Tubeuf phot.) The mycelium of Ux. n
RMT1HGNE–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 Flu. 63.—Exoascus aureus. Leaf section from the margiu of a swelling, showing normal and hypertrophied tissue. The cells of the swelling are abnormally elongated with thickened walls, and some show secondary cell-division. The bases of the asei are wedged in between the cells; one ascus is shown with conidia. (v. Tubeuf del.) Exoascus cameus Johan. occurs on leaves of Brtv.la odorata, B. nana, and B.
RMMCK5M1–. Fig. 57.—E.coasciis cerasi on Prunus C'erasiu. Clicrry-treo in blossom, with the exception of four witches' brooms. The tree is as yet leafless except the brooms, which are in full foliage and show up dark. (v. Tubeuf phot.) Exoascus carpini Eostr. is common on Carpinus Betukts (horn- beam) (Fig. 55). The brooms produced are bushy and densely leafed; the twigs are thickened and much branched; the leaves
RMRM7H90–. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Plate XVI.—Exoascus communis Sadebeck {58,59 on P. maritima IVang., 60 on P. nigra Aiton).. 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.. Cornell University. Agricultural Experiment Station. Ithaca, N. Y. : The University
RMPG42PW–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 162 ASCOMYCETES. into the inner tissues of newly-formed twigs and leaves. The mycelium of Ex. alpinus passes the winter in the buds, spreading thence in spring into young twigs and leaves.. Fig. 57.—Exoascus cerasi on Prunns Ceratm. Cherry-tree in blossom, with the exception of four witches' brooms. The tree is as yet leafless except the brooms, which are in full foliage and show up dark. (v. Tubeuf phot.J Exoascus
RMT1HG8N–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 158 ASCOMYCETES. contain only conidia, whereas those on Alnvs-incana are said by Sadebeck to contain only ascospores, unless on very rare occasions. In the lower and higher Alps, although both species of alder are not infrequently found together, yet the Rvoascus is found only on Alniis incana, and no species occurs on A. glutinosa. Fig. 53.—Exoascus abii-incanae in catkins of Alnus incana. Many of
RMMCK6WE–. Flu. 63.—Exoascus aureus. Leaf section from the margiu of a swelling, showing normal and hypertrophied tissue. The cells of the swelling are abnormally elongated with thickened walls, and some show secondary cell-division. The bases of the asei are wedged in between the cells; one ascus is shown with conidia. (v. Tubeuf del.) Exoascus cameus Johan. occurs on leaves of Brtv.la odorata, B. nana, and B. intermedia. The pustular outgrowths rise above
RMRDC2BE–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fig. (il.—Exoascus dej'or^nans. Comparison of normal section of leaf of Pvv,nus Persica with a hypertrophied one, B; in the latter the mycelial hyphae have been slightly shaded. The sections are from different parts of the same leaf, and are drawn with the same magnification. (After W. G. Smith.) on the almond {Amygdalus communis)^ resembles Ex. deformans so closely that they are now regarded as the same species.. P
RMPG42RH–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 158 ASCOMYCETES. contain only conidia, whereas those on Almis-incana are said by Sadebeck to contain only ascospores, unless on very rare occasions. In the lower and higher Alps, although both species of alder are not infrequently found together, yet the Exoascus is found only on Alnus incaria, and no species occurs on A. glutinosa. r. Fig. 53.—Exoascus alni-incanae in catkins of Alnus incana. Many of the scales are
RMT1HGCW–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 THE PARASITIC! EXOASCEAE. 161 Exoascus alpinus Johan. and Ex. nanus Johaii. Both occur on Bftuhi nana, and induce formation of hypertrophied twigs. 'VK/. / Fig. 56.— Witches' Broom of the Cherry. Exoascus cerasi on Prv.nus Cerasus. The whole left side forms a large broom. A smaller example occupies the summit of the crown, while another hangs downwards to the right. In winter condition. (v. Tubeuf
RMMCKB23–. Fig. 57. — Peach loaf curl. After Atkinson. treatment, and the method of using it, have been given under peach brown rot. Curl (Exoascus deformans (Berk.) Fckl.). — Throughout the peach-producing region this disease abounds, it being particularly injurious in the more moist localities. The annual loss caused by it approximates $3,000,000 in the United States. The disease is due to a fungus which grows in the leaves, causing the peculiar malformation which justly gives rise
RMRM7HJ2–. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Plate XI.—Figs. 26-32, Exoascus varius Atkinson [on P. serotina L.). P^S- 33i P- varius? {On P. demissa Walp.).. 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.. Cornell University. Agricultural Experiment Station. Ithaca, N. Y. : The University
RMPG4EYW–. Diseases of economic plants . Plant diseases. 126 DISEASES OF ECONOMIC PLANTS value of the crop, and Selby estimated the loss in one crop in Ohio at from 20 to 50 per cent. The beneficial effects of the self-boiled lime-sulphur. Fig. 57. — Peach leaf curl. After Atkinson. treatment, and the method of using it, have been given under peach brown rot. Curl {Exoascus deformans (Berk.) Fckl.). — Throughout the peach-producing region this disease abounds, it being particularly injurious in the more moist localities. The annual loss caused by it approximates $3,000,000 in the United States. The dis
RMT1HEFA–Diseases of economic plants (1910) Diseases of economic plants diseasesofeconom02stev Year: 1910 126 DISEASES OF ECONOMIC PLANTS value of the crop, and Selby estimated the loss in one crop in Ohio at from 20 to 50 per cent. The beneficial effects of the self-boiled lime-sulphur Fig. 57. — Peach leaf curl. After Atkinson. treatment, and the method of using it, have been given under peach brown rot. Curl (Exoascus deformans (Berk.) Fckl.). — Throughout the peach-producing region this disease abounds, it being particularly injurious in the more moist localities. The annual loss caused by it
RMMCKB30–. Fig. 43. — Peach leaf-cui tkinson. popular name. This fungus destroys the utility of the leaf as a starch-producing organ, and eventually causes defolia- tion. This loss may be manifest in two ways: first, by the present effect upon the vitality and vigor of the tree, and immediate injury to the crop; second, by a weakening of the tree in succeeding years, due to the lack of full nourishment * The sub-genus Exoascus is by some regarded as of specific rank and the name as Exoascus deformans.
![. Bulletin. Plant diseases -- United States. BULL. 20, DIV. VEQ. PHYS. & PATH., U. S. OEPT. AGRICULTURE. PLATE IV.. Newtnii H.Pierce ad nat dp]. GERMINATION OF THE SPORES OF EXOASCUS DEFORMANS. A.Hocii &. Cti.Lith.l^alliin.jre.. 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.. United States. Division of Vegetable Physiology and Pathology. Washington : G. P. O. Stock Photo](https://c8.alamy.com/comp/RH18R4/bulletin-plant-diseases-united-states-bull-20-div-veq-phys-amp-path-u-s-oept-agriculture-plate-iv-newtnii-hpierce-ad-nat-dp-germination-of-the-spores-of-exoascus-deformans-ahocii-amp-ctilithlalliinjre-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-united-states-division-of-vegetable-physiology-and-pathology-washington-g-p-o-RH18R4.jpg ". Bulletin. Plant diseases -- United States. BULL. 20, DIV. VEQ. PHYS. & PATH., U. S. OEPT. AGRICULTURE. PLATE IV.. Newtnii H.Pierce ad nat dp]. GERMINATION OF THE SPORES OF EXOASCUS DEFORMANS. A.Hocii &. Cti.Lith.l^alliin.jre.. 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.. United States. Division of Vegetable Physiology and Pathology. Washington : G. P. O. Stock Photo")
RMRH18R4–. Bulletin. Plant diseases -- United States. BULL. 20, DIV. VEQ. PHYS. & PATH., U. S. OEPT. AGRICULTURE. PLATE IV.. Newtnii H.Pierce ad nat dp]. GERMINATION OF THE SPORES OF EXOASCUS DEFORMANS. A.Hocii &. Cti.Lith.l^alliin.jre.. 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.. United States. Division of Vegetable Physiology and Pathology. Washington : G. P. O.
RMPG455P–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 132 MYCOLOGY Other without paraphyses, so that they form a velvety layer on the surface of the host plant. Eight ascospores are generally found, as in the genus Exoascus, but in Taphrina (Taphria) the number may be increased considerably by budding, so that the whole ascus will be. Fig. 42.—Exoascus and Taphrina. A—F, Exoascus pruni, A. Appearance on diseased twig; B, cross-section of diseased fruit; C. mycelium in tissues of host; D, young asci; E, mature ascus with spores; F, germinat
RMT1HGDW–Diseases of plants induced by Diseases of plants induced by cryptogamic parasites; introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae diseasesofplant00tube Year: 1897 162 ASCOMYCETES. into the inner tissues of newly-formed twigs and leaves. The mycelium of Ex. alpinus passes the winter in the buds, spreading thence in spring into young twigs and leaves. Fig. 57.—Exoascus cerasi on Prunus droius. Cherry-tree iii blossom, with the exception of four witches' brooms. The tree is as yet leafless except the brooms, which are in full foliage and show up dark. (v. Tubeu
RMMCKA85–. Fig. 57. — Peach leaf curl. After Atkinson. treatment, and the method of using it, have been given under peach brown rot. Curl (Exoascus deformans (Berk.) Fckl.). — Throughout the peach-producing region this disease abounds, it being particularly injurious in the more moist localities. The annual loss caused by it approximates $3,000,000 in the United States. The disease is due to a fungus which grows in the leaves, causing the peculiar malformation which justly gives rise
RMRDXT24–. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. ASCOMYCETES—EUASCI—EXOASCUS 253 they grow and spread out to the surface, forming a single layer of cells, each cell swells, the cuticle becomes ruptured and a palisade-like layer of asci is formed. There are eight ascospores in each ascus which escape by means of an opening at the tip. The ascospores of Taphrina frequently germinate in the as- cus, budding like yeast and in this budding condition they produce a small amount of alcoho
RMPG44GC–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. GALLS 395 Witches' Brooms and Stag-head.—^The branches of the silver fir, the flowers, fruits and portions of stem of various species of plants are trans- formed into witches' brooms, or stag-head by the action of fungi of the genus Exoascus and in the silver fir by Mcidium elatinum. The shoots. Fig. i6i.—Diagram of a longitudinal section of a cedar twig bearing a small cedar apple in June, a. Epidermis of cedar leaf; b, sclerenchymatous layer; c, fibro- vascular bundle; d, resin gland;
![Archive image from page 458 of Die pilze in morphologischer, physiologischer,. Die pilze in morphologischer, physiologischer, biologischer und systematischer beziehung diepilzeinmorpho00zopf Year: 1890 Abschnitt VI. Systematik und Entwickclungsgeschiclite. 439 Blättern fructificirend, wo die Ascenlager grosse, das ganze Blatt überziehende Beulen hervorrufen, (Fig, 139, 2) die später vertrock- nen. (Die Auswüchse , welche ein Exoascus auf den Schuppen der weiblichen Kätzchen hervorruft (Fig. 139, i) gehören nicht zu vorliegender Species, sondern zu Exoascus Alni incanac]. KÜHN). Die fertilen Stock Photo](https://c8.alamy.com/comp/T3YN7B/archive-image-from-page-458-of-die-pilze-in-morphologischer-physiologischer-die-pilze-in-morphologischer-physiologischer-biologischer-und-systematischer-beziehung-diepilzeinmorpho00zopf-year-1890-abschnitt-vi-systematik-und-entwickclungsgeschiclite-439-blttern-fructificirend-wo-die-ascenlager-grosse-das-ganze-blatt-berziehende-beulen-hervorrufen-fig-139-2-die-spter-vertrock-nen-die-auswchse-welche-ein-exoascus-auf-den-schuppen-der-weiblichen-ktzchen-hervorruft-fig-139-i-gehren-nicht-zu-vorliegender-species-sondern-zu-exoascus-alni-incanac-khn-die-fertilen-T3YN7B.jpg "Archive image from page 458 of Die pilze in morphologischer, physiologischer,. Die pilze in morphologischer, physiologischer, biologischer und systematischer beziehung diepilzeinmorpho00zopf Year: 1890 Abschnitt VI. Systematik und Entwickclungsgeschiclite. 439 Blättern fructificirend, wo die Ascenlager grosse, das ganze Blatt überziehende Beulen hervorrufen, (Fig, 139, 2) die später vertrock- nen. (Die Auswüchse , welche ein Exoascus auf den Schuppen der weiblichen Kätzchen hervorruft (Fig. 139, i) gehören nicht zu vorliegender Species, sondern zu Exoascus Alni incanac]. KÜHN). Die fertilen Stock Photo")
RMT3YN7B–Archive image from page 458 of Die pilze in morphologischer, physiologischer,. Die pilze in morphologischer, physiologischer, biologischer und systematischer beziehung diepilzeinmorpho00zopf Year: 1890 Abschnitt VI. Systematik und Entwickclungsgeschiclite. 439 Blättern fructificirend, wo die Ascenlager grosse, das ganze Blatt überziehende Beulen hervorrufen, (Fig, 139, 2) die später vertrock- nen. (Die Auswüchse , welche ein Exoascus auf den Schuppen der weiblichen Kätzchen hervorruft (Fig. 139, i) gehören nicht zu vorliegender Species, sondern zu Exoascus Alni incanac]. KÜHN). Die fertilen
RMMCK6H5–. ii^r '^^'- V^'^'X* Fig. 57.â£'.coa3Ci/.s ccmsi on Pt-unws Cerasas. Cherry-tree in blossom, with the exception of four witches' brooms. The tree is as yet leafless except the brooms, which are in full foliage and show up dark. (v. 'I'ubeuf phot.J Exoascus carpini liostr. is common on Carpinus Betulus (horii- heam) (Fig. 55). The brooms produced are bushy and densely leafed; the twigs are thickened and much branched ; the leaves
RMRDJX1D–. Nature study and life. Nature study. 464 NATURE STUDY AxD LIFE Peach-Leaf Curl, Exoascus defor?nans. — By attacking the leaves, blossoms, and growing twigs of the peach this fungus sometimes causes the loss of the entire crop, and great damage to the trees. If present in the neighborhood, the pupils will have no difficulty in finding specimens for study. Peach-leaf curl is so easily prevented by spraying that there is no e-xcuse for allowing an orchard to be affected by it. Peach Yellows. — No fungus has been discovered in connection with this disease, although it has been sought for with g
RMPG4484–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. DETAILED ACCOUNT OF SPECIFIC PLANT DISEASES S3S open out, the curling and arching of the blades become manifest. The curling may be confined to a small portion of a leaf, or it may be general and all of the leaves of a tree may be.affected, as well as the young stem on which^they are found. The green, or reddish, color of. Fig. 192.—Peach leaves deformed by leaf curl {Exoascus deformans). (.After Heald, F. D., Bull. 135 {Sci. Ser. 14), Univ. of Tex., Nov. 15, 1909.) the leaves is lost a
RMT1HGFJ–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 THE PARASITK' EXOASCEAK. 161 Exoascus alpinus Johau. and Ex. nanus .rohan. Both occur on Betula ncnvi, and induce formation uf hypertrophied twigs. wliolu loft Biiic foniiM ;i birj,'c l>rcK>in. A Hiimllcr cxiiini)lu ociupie!* tho Biiiiiiiiit of tho crown, while another hanh' <lwnw:iril.4 to tho riKl't- •» winter condition, (v. TMl)ouf i-hot.) The myc
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