RMA6P4N9–Leaf spot on ivy Hedera helix with pycnidia many possible fungal causes
RFT5HWRC–apothecium of lichen Cladonia with red pycnidia, growing on the forest floor
RFE6MN06–Ramalina cuspidata. A common lichen of coastal rocks
RMF0RJEF–Didymella bryoniae Cucumber stem rot showing black pycnidia developing on stem
RF2GAXWDJ–Stem rust, also known as cereal rust, black rust, red rust or red dust, is caused by the fungus Puccinia graminis, which causes significant disease.
RF2HD4M23–Cladonia coccifera, known as scarlet-cup lichen or madame's pixie-cup
RM2E0T3AB–Sooty Blotch fungus affected apple with blemishes and black specks on the skin
RF2G21MBY–Lichen cladonia coniocraea and moss on tree bark in autumn forest. Black and white photo.
RFR629K7–Cladonia coniocraea in the Puyehue national park in Chilean Patagonia
RF2PWX45M–Reindeer lichen reindeer moss. Cladonia, genus of lichens in the Cladonia family Cladoniaceae. Mushroom kingdom. Karelia, Russia, taiga tundra. Cetrar
RM2AKRRTK–Annual report of the North Carolina Agricultural Experiment Station . Fig. 13.— Ascochyta Chrvsanthenfi Stevens; portion of colony showing few pycnidia; cf.Fig. 14.
RF2WP0417–Reindeer lichen reindeer moss. Cladonia, genus of lichens in the Cladonia family Cladoniaceae. Mushroom kingdom. Karelia, Russia taiga tundra
RMPG4BFN–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. RHYTISMA. 245 eight needle-shaped unicellular spores; pycnidia (spermogonia) with little unicellular conidia are also formed. The fungus attacks leaves of sycamore {Acer Pseudoplatanus), the black spots making their appearance in September. The apothecia ripen on the ground during the following summer.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for rea
RMMCKA2Y–. Fig. 104.—Portions of muskmelon vine showing pycnidia and perithecia of Mycosphserella. After Dorsey.
RMT1H29R–Diseases of economic plants (1921) Diseases of economic plants diseasesofeconom01stev Year: 1921 Fig. 150. — Young ear of com inocu- lated in the silk with Diplodia. Af- ter Burrill and Barrett. bearing pycnidia.
RMF32CEM–Bud blast, Pycnostysanus azaleae, on an aborted flower bud of an ornamental rhododendron, Berkshire, England, June
RMA6P4N8–Leaf spot on ivy Hedera helix with pycnidia many possible fungal causes
RM2AP611X–Septoria leaf blotch (Zymoseptoria tritici) lesions of fungal disease with pycnidia on wheat leaves
RFDX0KN7–A common lichen of coastal rocks, normally found around high water mark and just above
RM2GCJMGF–Halo spot (Pseudoseptoria donacis) fungal disease with bleached lesions & pycnidia with a dark margin on a barley (Hordeum vulgare) leaf
RF2GAXWER–Stem rust, also known as cereal rust, black rust, red rust or red dust, is caused by the fungus Puccinia graminis, which causes significant disease.
RM2GCJMHM–Halo spot (Pseudoseptoria donacis) fungal disease with bleached lesions & pycnidia with a dark margin on a barley (Hordeum vulgare) leaf
RF2FYYW9Y–Lichen cladonia coniocraea and moss on tree bark in autumn forest.
RF2PWKGHD–Reindeer lichen reindeer moss. Cladonia, genus of lichens in the Cladonia family Cladoniaceae. Mushroom kingdom. Karelia, Russia, taiga tundra. Cetrar
RMAGWKTH–Unconfirmed leaf spot possibly one of several fungi on an ivy leaf Hedera helix
RM2DAC5N8–Unhealthy apples affected by Sooty Blotch fungus
RMAJTCN0–Halo spot (Pseudoseptoria donacis) lesions pycnidia on a barley leaf
RFCEFR72–Hypogymnia physodes a very common lichen mainly on trees but also on rocks and posts.
RMA1W1FN–Black dot Colletotrichum atramentarium pycnidia and discolouration on potato tuber surface
RM2AWKKMY–Journal of agricultural research . ible todetermine the position of this organism among previously describedspecies, since it has been found to be morphologically not unlike severalof them. Its relation to the production of Citrus canker is definitelyestablished as a result of this study. Then, too, no particular difficultywould be experienced by other investigators in identifying it because of its association withCitrus canker. Inview of these facts itseems well to de-scribe it as a newspecies with the fol-lowing brief technicaldiagnosis: ^ Phoma socia, n. sp. Pycnidia irregularlydistributed,
RMA4BXY1–Anthacnose Colletotrichum graminicola lesions with pycnidia on a maize or corn leaf
RF2WP06FR–Reindeer lichen reindeer moss. Cladonia, genus of lichens in the Cladonia family Cladoniaceae. Mushroom kingdom. Karelia, Russia taiga tundra
RMAJWKPA–Septoria leaf spot Zymoseptoria tritici lesions and pycnidia on wheat leaf
RMPG3R35–. Manual of fruit diseases . Fruit. BLACKBERRY DISEASES 167 But the successive activities of Scptoria Riibi have not been care- fully studied ; this is probably due to the fact that the disease which it produces has never been of great economic importance. The mycelium of the fungus growing in local areas within the leaf-tissues causes the color changes and finally their death. The fungus forms fruit- ing bodies — pycnidia — just beneath the upper surface of the cuticle. These, as the^' mature, break through the cuti- cle and stand exposed over the affected area. Within the pycnidia spores are
RMAT4PB0–Leaf lesion of ascochyta leaf spot Ascochyta pisi with pycnidia on pea leaf
RMMCKAE7–. Fig. 17. — Apple black-rot canker showing numer- ous pycnidia. After Whetzel.
RMAJTCR4–Septoria leaf spot Zymoseptoria tritici lesions pycnidia on wheat leaves
RMT1HMFP–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 RHYTISMA. 245 eight needle-shaped uniceUular spores; pycnidia (spermogonia) with little unicellular conidia are also formed. The fungus attacks leaves of sycamore (Acer Pseudoplatanus), the black spots making their appearance in September. The apothecia ripen on the ground during the following summer.
RMAT4PB3–Leaf lesions of ascochyta leaf spot Ascochyta pisi with pycnidia on pea leaf
RF2GAXWE6–Stem rust, also known as cereal rust, black rust, red rust or red dust, is caused by the fungus Puccinia graminis, which causes significant disease.
RMAJTCXF–Septoria leaf spot Zymoseptoria tritici lesions and pycnidia on wheat leaf
RF2FN6WJD–Lichen cladonia coniocraea and moss on tree bark in autumn forest.
RMAPG7M7–Anthracnose Colletotrichum spp lesion with concentric rings of pycnidia on Chinese chives leaf
RF2PX4DX3–Reindeer lichen reindeer moss. Cladonia, genus of lichens in the Cladonia family Cladoniaceae. Mushroom kingdom. Karelia, Russia, taiga tundra. Cetrar
RMAPF8JA–Phoma leaf spot Phoma sp lesion and pycnidia on a sugar beet leaf
RM2DAC5MB–Unhealthy apple affected by Sooty Blotch fungus with blemishes and black specks on the skin
RMA79J9K–Septoria leaf spot Zymoseptoria tritici lesions pycnidia on a wheat leaf
RMAJWJYC–Septoria leaf spot Zymoseptoria tritici cirri and pycnidia on a wheat leaf
RM2AWY151–Text-book of botany, morphological and physiological . cup,which is either flat and sessile (Fig. 182) or stalked. The hymenium consists ofparaphyses and asci, in which eight spores are usually formed simultaneously; theparaphyses generally appear earlier, but are finally crowded out by the asci. The sporessometimes possess nuclei, but are sometimes destitute of them (Fig. 182). The Disco-mycetes agree, however, with the Pyrenomycetes — from which they are principallydistinguished by their gymnocarpous receptacles—in the occurrence of spermogonia,pycnidia, and conidia, as forerunners of the as
RMPG3GF8–. Comparative morphology and biology of the fungi, mycetozoa and bacteria . Plant morphology; Fungi; Myxomycetes; Bacteriology. CHAPTER V.—COMPARATIVE REVIEW.—ASCOMVCETES. 243 his Peziza benesuada (Fig. 115); similar organs occupy the margin of the platter- shaped tube-bearing hymenia of Cenangium Frangulae, Tul. Small round cells incapable of germination, which will be noticed again in a subsequent page, are said by Brefeld * to be sometimes abscised from the ramifications of the paraphyses in Peziza Sclerotiorum. The second place where these doubtful' spermatia' occur is in the pycnidia of c
RMMCKB59–. Fig. 17. — Apple black-rot canker showing numer- ous pycnidia. After Whetzel.
RMT1JH41–Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 56. Egg-Plant Diseases. a. Phomopsis of leaf, 6. Phomopsis on fruit, c. conidiophores, rf. stylospores, e. pycnospores of Phomopsis vexans, f. photomicrograph of a cross section through an infected calyx of an egg plant showing pycnidia of P. vexans (c. to f. after Harter), g.. anthracnose on egg-plant fruit.
RF2GAXWEE–Stem rust, also known as cereal rust, black rust, red rust or red dust, is caused by the fungus Puccinia graminis, which causes significant disease.
RF2G11NJE–Lichen cladonia coniocraea and moss on tree bark in autumn forest.
RM2DAC5M8–Unhealthy apple affected by Sooty Blotch fungus as fruit disease on economic plant
RMAJWKH4–Septoria leaf spot Zymoseptoria tritici lesion with pycnidia cirri on wheat leaf
RM2AWK635–Introduction to the study of fungi : their organography, classification, and distribution for the use of collectors . be transformed into cup-shapedreceptacles, do not pass into this perfectstate until after having produced veryshort, narrow conidia, or spermatia, ashe calls them, or else stylospores onshort sporophores, such spores beingequal in size to the true sporidia tobe afterwards developed. Some of thetubercles confine themselves to thisFig. 41.—^-<.y.</,.c stylosporous creneration, and always re- xnqumans, . . . main simple pycnidia — that is tosay, tubercles or cells enclosing
RMPG4B3H–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 364 UREDINEAK. direction; their sori form dark spots which break out from beneath the epidermis. The yellow uredospores have a coat beset with fine spines, and are given off from sori which may or may not be enclosed in a peridium. The sori of the aeeidium-stage have no peridium, and are known under the generic name of Caeoma; they frequently occur on other hosts than those of the teleutospores. Pycnidia are produce
RMT1HYRD–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 476 FUNGI IMPERFECTI. of the shoots, and either rupture the epiderinis or grow out from the leaf-scar cushions (Fig. 297). The conidia are abjointed from filamentous conidiophores inside the pycnidia, and emerge as tendril-like structures. They are two-celled, small, cylindrical, and pointed at both ends. Germination takes place easily in water, and the disease
RF2GAXWDW–Stem rust, also known as cereal rust, black rust, red rust or red dust, is caused by the fungus Puccinia graminis, which causes significant disease.
RF2NRP8WY–Young barley plants with symptoms of fungal disease, infection on leaves, chlorosis and dark spots.
RF2G0R04N–Lichen cladonia coniocraea and moss on tree bark in autumn forest.
RMAJWKGB–Septoria leaf spot ZSymoseptoria tritici baclit lesion to show pycnidia in wheat leaf
RM2ANC3TM–A text-book of mycology and plant pathology . , or on the ground where the droppings of the aphis in the formof honey-dew have collected. Its mycelium is greenish-black, much-branched, rigid, septate and the hyphse are glued together by anabundant mucilaginous substance forming a loose spongy mass, bearingan abundance of pyriform, coriaceous perithecia, which enclose narrow,thick-walled, eight-spored asci. Elongate pycnidia and perithecia arealso frequently seen. Family 3. Microthyriace^.—The mycelium of the fungi of thisfamily is superficial and dark in color. The perithecia are superficial 1
RMACW45M–Septoria leaf blotch (Zymoseptoria tritici) infected wheat leaf and pycnidia
RMA79HWW–Septoria leaf spot Zymoseptoria tritici lesions pycnidia spores on a wheat leaf
RMPG3YH6–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 260 FUNGOUS DISEASES OF PLANTS are produced within which areas the pycnidia may be found. Cuttings may also be affected. The fungus. The pycnidial stage is a characteristic Phoma or Phyllosticta, ioo to 120/i in diameter, as shown in Fig. 113. These are distributed over the affected surfaces, and produce abundant conidia, which are hyaline, obovoidal, frequently trun- cated at the apex, measuring 10.5-13.5 X 5-6/*. The conidia are appendaged, and they are expelled from the perithec
RMBRXKD9–Septoria leaf spot (Zymoseptoria tritici) lesion to show pycnidia in wheat leaf
RMMCKB4A–. Fic. 29.—Apple black rot canker (sphaeropsose) showing numer- ous pycnidia. After Whetzel.
RMAGWW3W–Hebe leaf spot Septoria exotica spotting and pycnidia on a hebe leaf
RMT1HY27–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] CORYNEUM 455 other causes also are capable of causing gunimosis. I have shown that in one instance the production of large quantities of gum was due to the presence of CladosporUim epiphyllum. In October Vuillemin noted the presence of pycnidia on the dead patches formed by Cory?ieum on the shoots. To these he gave the name of Phyllosticta beyerinckii { = Phyl- losticta persicae, Sacc). The same author also observed in the spring months perithecia nestling amongst the pycnidia s
RMBGA5YJ–Hebe leaf spot (Septoria exotica) spotting and pycnidia on a hebe leaf
RF2NRP9KW–Young barley plants with symptoms of fungal disease, infection on leaves, chlorosis and dark spots.
RMBG75PA–Ring spot (Mycosphaerella brassicicola) lesion & pycnidia on a cabbage leaf
RF2FMMRF2–Lichen cladonia coniocraea and moss on tree bark in autumn forest
RMBRXTKX–Septoria leaf spot (Septoria tritici) lesions, pycnidia, & spores on a wheat leaf
RMBJT9RY–Anthracnose (Colletotrichum gloeosporioides) lesions & pycnidia fruiting bodies on a lemon leaf
RMAXHXJY–Gangrene Phoma exigua var foveata mycelium and pycnidia on a potato tuber surface
RM2AKRP00–Annual report of the North Carolina Agricultural Experiment Station . 14.—Ascochyta Chrysanthemi Stevens; portion of colony showing many pycnidia;cf. Fig. 13. VARIATION OF FUNGI DUE TO ENVIRONMENT. 61 of agar after the agar first plated had set, did not change the proportion ofthe two types. Nor did sowing in such way that the spores were at thebottom rather than at the top of the agar change results. There was amarked tendency of colonies of both types of the fungus to become moreproductive of large pycnidia where two different colonies approach each other,suggesting that there might be neede
RMD50NJ0–Pea leaf and stem spot, Ascochyta pisi, lesions with pycnidia on diseased pea plant
RMT9A1AF–Leaf blight (Phomopsis obscurans) common fungal disease causing a V-shaped lesion with pycnidia on a strawberry leaf
RMPG4B54–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 352 UREDINEAE. aecidia (Aec. parnassiae Schlecht.) on Parnassia palustris.. Spermogonial pycnidia are unknown. P. sdrpi D. C. (Britain). Uredo- and teleutospores on Scirpus; aecidia, according to Chodat, = Aec. nymphaeoides on Nymphaea, Nuphar, and Lim- nanthemmn, nymphaeoides.. Fig. 186.—Puccinia suaveolens on Cirsium arveTise. The plants ai-e abnormally slongated; the leaves have remained smaller and simpler, and
RMT9A1AD–Leaf blight (Phomopsis obscurans) common fungal disease causing a V-shaped lesion with pycnidia on a strawberry leaf
RMMCKAB2–. Fig. 29.—Apple black rot canker (sphaeropsose) showing numer- ous pycnidia. After Whetzel.
RMT9A17J–Leaf blight (Phomopsis obscurans) common fungal disease causing a V-shaped lesions at the leaf edge with pycnidia on a strawberry leaf
RMT1HK2X–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 CL'CLItBlTAKlA. 209 unicellular conidia, at first white, later grey. It is these pycnidia which cause the fine perforations of the periderm of twigs. Yet another form of pycnidia, previously known as Dipludia cytisi (Awd.), (Xo. 4). This, like the last, breaks through the corky layers of the bark. It has a peridiuni composed of loose pseudoparenchyma and, withou
RMAACKD3–Septoria leaf blotch Zymeptoria tritici on wheat fungal lesion
RM2GJ5CWE–Ascochyta leaf spot or leaf blight (Ascochyta hordei) f ungal disease lesions on the periphery of barley leaves
RF2NRP9XJ–Young barley plants with symptoms of fungal disease, infection on leaves, chlorosis and dark spots.
RMAGWT7W–Hebe leaf spot Septoria exotica on a hebe leaf
RMA4C0P3–Leaf spot Septoria exotica on Hebe sp leaf
RM2C6N14C–Leaf spot (Septoria apiicola) lesions on flat leaf of continental parsley (Petroselinum crispum)
RMAJTYM3–Ring spot Mycosphaerella brassicicola lesions on cabbage leaf
RM2AJ5P7E–Fungous diseases of plants . er, that veryfew observations have beensystematically made to deter-mine the time of developmentof the ascospores. The ascimay apparently develop in per-ithecia which have previouslyserved as pycnidia, or restingstromatic masses may give riseto the perithecia directly. Theasci are broadly clavate, some-times slightly curved, and theycontain eight nonseptate, hyaline spores, the latter measuring 12-17 X 4.5-5 A*- They are generally ovate. Control. The most efficient remedy for the black rot isBordeaux mixture. After cleaning the vineyard as well as possi-ble of the
RMAF6YG1–Ring spot Leptosphaeria sacchari lesions fruiting bodies on a sugarcane leaf
RMA4C0P9–Camellia leaf spot Pestalotiopsis guepini on Camellia leaf
RMPG4B1G–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. 378 UREDINEAE. and small yellow pycnidia are produced during July or August. The aecidia follow from August till September, occupying yellow zones on the otherwise green needles; their white peridia project as much as 2 mm. above the surface of the needle, and dehisce by rupture of the apex. The aecidiospores are formed in large numbers and, carried by wind, reach leaves and shoots of alpine-rose where they immediat
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