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White rust Albugo candida on honesty Lunaria annua leaf Stock Photo
RMAGWKWJ–White rust Albugo candida on honesty Lunaria annua leaf
White rust or white blister fungal disease on broccoli Stock Photo
RMERYFD6–White rust or white blister fungal disease on broccoli
White rust (Albugo candida) on honesty (Lunaria annua) leaf Stock Photo
RMBHNHF0–White rust (Albugo candida) on honesty (Lunaria annua) leaf
'Stags head' symptoms of white rust disease on broccoli Stock Photo
RMEY83AW–'Stags head' symptoms of white rust disease on broccoli
White blister rust (Albugo candida) blisters on a cabbage leaf top surface Stock Photo
RMBG75YB–White blister rust (Albugo candida) blisters on a cabbage leaf top surface
common shepherd's-purse (Capsella bursa-pastoris), fungal decay, Albugo candida Stock Photo
RMB6EXPT–common shepherd's-purse (Capsella bursa-pastoris), fungal decay, Albugo candida
White rust Albugo candida on honesty leaf Stock Photo
RMA5G7CD–White rust Albugo candida on honesty leaf
. Fig. t)4. Albugo Candida {Veisoon). B Coiiidienträger; C, Z> Scliwänn- sporenbildung; E Schwärmsporen isoliert; P Keimung; 0 einkei- mende Keimscliläuche (400/1). (Nach De Bary.) Stock Photo
RMMCTK5Y–. Fig. t)4. Albugo Candida {Veisoon). B Coiiidienträger; C, Z> Scliwänn- sporenbildung; E Schwärmsporen isoliert; P Keimung; 0 einkei- mende Keimscliläuche (400/1). (Nach De Bary.)
White blister rust Albugo candida on honesty Lunaria annua leaf Stock Photo
RMA4C0R0–White blister rust Albugo candida on honesty Lunaria annua leaf
The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world . Fig. 6.— Portion of a filament of Albugo Candida, withits haustoria penetrating host cells. Highly mag-nified. From this internal part of the plant shortbranches grow out into the air, and these becomeswollen terminally into rounded segments, whichare in fact short zoosporangia. Instead of formingzoospores at once, they first fall off and thenthose that fall into water develop zoospores. FUNGI much as in the water moulds. As these struc-tures Stock Photo
RM2AJJAG6–The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world . Fig. 6.— Portion of a filament of Albugo Candida, withits haustoria penetrating host cells. Highly mag-nified. From this internal part of the plant shortbranches grow out into the air, and these becomeswollen terminally into rounded segments, whichare in fact short zoosporangia. Instead of formingzoospores at once, they first fall off and thenthose that fall into water develop zoospores. FUNGI much as in the water moulds. As these struc-tures
. Diseases of truck crops and their control . Vegetables. Fig. 33. Diseases of the Cauliflower and Radish. a. spot disease of cauliflower (after McCulloch), 6, white rust of radish, c. conidio- phore of the white rust fungus, Cystopus candidus, <i. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head, g. perithecium of Mycosphmrella brassicicola, h. ascus of Mycospk<Erella brassicicola, i. ascospores of MycosphtBreUa brassicicola (g. to i. after Osmun and Anderson).. Please note that these images are extracted from scanned pag Stock Photo
RMPG4CMT–. Diseases of truck crops and their control . Vegetables. Fig. 33. Diseases of the Cauliflower and Radish. a. spot disease of cauliflower (after McCulloch), 6, white rust of radish, c. conidio- phore of the white rust fungus, Cystopus candidus, <i. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head, g. perithecium of Mycosphmrella brassicicola, h. ascus of Mycospk<Erella brassicicola, i. ascospores of MycosphtBreUa brassicicola (g. to i. after Osmun and Anderson).. Please note that these images are extracted from scanned pag
Archive image from page 214 of Die gallen der pflanzen, ein. Die gallen der pflanzen, ein lehrbuch für botaniker und entomologen diegallenderpfla00ks Year: 1911 - Figur 97. Abnorme Vergrößerung und ab- norme Gestalt der Kerne, vielkernige Zel- len, a, Rindenzelle von Ädoxa mosehatellina nach In- fektion' durch Puccinia adoxae; der Kern ist von Hyphenfäden umklammert; s, Cellulosescheiden; 1 Leukoplasten, b, Kern aus der Epidermis einer Galle von Albugo Candida auf Capsella bursa pasians neben einem normalen Zellkern desselben Gewebes; c, Gelappte Kerne aus den Gallen der Uslilago viaydis auf Stock Photo
RMW03R62–Archive image from page 214 of Die gallen der pflanzen, ein. Die gallen der pflanzen, ein lehrbuch für botaniker und entomologen diegallenderpfla00ks Year: 1911 - Figur 97. Abnorme Vergrößerung und ab- norme Gestalt der Kerne, vielkernige Zel- len, a, Rindenzelle von Ädoxa mosehatellina nach In- fektion' durch Puccinia adoxae; der Kern ist von Hyphenfäden umklammert; s, Cellulosescheiden; 1 Leukoplasten, b, Kern aus der Epidermis einer Galle von Albugo Candida auf Capsella bursa pasians neben einem normalen Zellkern desselben Gewebes; c, Gelappte Kerne aus den Gallen der Uslilago viaydis auf
macro, close-up, macro admission, close up view, macro, close-up, macro Stock Photo
RFHJAPHG–macro, close-up, macro admission, close up view, macro, close-up, macro
. Fig. 98. - Seedling cabbage plant spotted with downy mildew. Original. White rust (Albugo Candida white rust is similar in appearance upon the beet. It has not often been reported as a pest. Wilt, fusariose (Fusarium sp.). — This wilt of cabbage, commonly known in the South as yellow sides, is very Stock Photo
RMMCKA3Y–. Fig. 98. - Seedling cabbage plant spotted with downy mildew. Original. White rust (Albugo Candida white rust is similar in appearance upon the beet. It has not often been reported as a pest. Wilt, fusariose (Fusarium sp.). — This wilt of cabbage, commonly known in the South as yellow sides, is very
White blister rust Albugo candida on honesty Lunaria annua leaf Stock Photo
RMA4C0PF–White blister rust Albugo candida on honesty Lunaria annua leaf
. College botany; structure, physiology and economics of plants. Botany. Fig. 126.—Albugo Candida showing the formation of the conidia spores just below the epider- mis of the host plant and also the antheridium and archegonium. swim for a few minutes m the moisture on the surface of the leaf, come to rest, lose their cilia and produce new hyphse which penetrate the leaf through the stomata. The oogonia and anthe- ridia are very similar to those of the Albugo. The late blight of the potato is in reality a mildew and is caused by a fungus (Phytophthora infestans). It is very similar to the grap Stock Photo
RMRE1N9Y–. College botany; structure, physiology and economics of plants. Botany. Fig. 126.—Albugo Candida showing the formation of the conidia spores just below the epider- mis of the host plant and also the antheridium and archegonium. swim for a few minutes m the moisture on the surface of the leaf, come to rest, lose their cilia and produce new hyphse which penetrate the leaf through the stomata. The oogonia and anthe- ridia are very similar to those of the Albugo. The late blight of the potato is in reality a mildew and is caused by a fungus (Phytophthora infestans). It is very similar to the grap
White blister rust Albugo candida pustules on upper leaf surface of old cauliflower plant Stock Photo
RMABH8B7–White blister rust Albugo candida pustules on upper leaf surface of old cauliflower plant
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PHYCOMYCETES 149 X. WHITE "RUST" OF CRUCIFERS Cystopus candidus (Pers.) LeV. Davis, B. M. The Fertilization of Albugo Candida. Bot. Gaz. 29: 296-310. pi. 22. 1900. Wager, H. On the Structure and Reproduction of Cystopus candidus Lev. Ann. Bot. 10: 295-339. pis. 23, 26. 1895. Zalewski, A. Zur Kenntniss der Gattung Cystopus Lev. Bot. Centrbl. 15 : 215-224. 1883.. Fig. 49. Flowers and Peduncles of Radish deformed by Cystopus (Photograph by II. H. Whetzel) The common white &q Stock Photo
RMPG4019–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PHYCOMYCETES 149 X. WHITE "RUST" OF CRUCIFERS Cystopus candidus (Pers.) LeV. Davis, B. M. The Fertilization of Albugo Candida. Bot. Gaz. 29: 296-310. pi. 22. 1900. Wager, H. On the Structure and Reproduction of Cystopus candidus Lev. Ann. Bot. 10: 295-339. pis. 23, 26. 1895. Zalewski, A. Zur Kenntniss der Gattung Cystopus Lev. Bot. Centrbl. 15 : 215-224. 1883.. Fig. 49. Flowers and Peduncles of Radish deformed by Cystopus (Photograph by II. H. Whetzel) The common white &q
White blister rust Albugo candida on cabbage leaf underside Stock Photo
RMA6P3Y3–White blister rust Albugo candida on cabbage leaf underside
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). Stock Photo
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).
White blister rust Albugo candida pustules on a cabbage leaf Stock Photo
RMAJTYPD–White blister rust Albugo candida pustules on a cabbage leaf
White blister rust (Albugo candida) on purple sprouting broccoli flower bud Stock Photo
RMG2PBTY–White blister rust (Albugo candida) on purple sprouting broccoli flower bud
. Fig. 33. Diseases of the Cauliflower axd Radish. a. Spot disease of cauliflower (after McCuIloch), b. white rust of radish, c. conidio- phore of the white rust fungus, Cyslopus candidus, d. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head, g! perithecium of Mycospho'reUa brassicicola, h. ascus of Mycospha-rella brassicicola, i. ascospores of Mycosphcerella brassicicola {g. to i. after Osmun and Anderson). Stock Photo
RMMCKWNT–. Fig. 33. Diseases of the Cauliflower axd Radish. a. Spot disease of cauliflower (after McCuIloch), b. white rust of radish, c. conidio- phore of the white rust fungus, Cyslopus candidus, d. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head, g! perithecium of Mycospho'reUa brassicicola, h. ascus of Mycospha-rella brassicicola, i. ascospores of Mycosphcerella brassicicola {g. to i. after Osmun and Anderson).
. Botany of the living plant. Botany. Fig. 357- |] Fertilisation of the Peronosporeae. i. Peronospora parasitica, young multi- '; nucleate oogonium (og), and antheridium (aw). 2. Albugo Candida. Oogonium with I' the central, uni-nucleate egg {os), and the fertiUsing tube (a) of the antheridium which I ^ introduces the male nucleus. 3. The same. The fertilised egg (0) surrounded bj^ periplasm (/>). (After Wager. x666.) (From Strasburger.) I : f such an antheridium as is seen in Vaucheria into the polhnodium of the Peronosporeae, is a comparatively sHght one: the latter does not liberate. i Stock Photo
RMRH8EE9–. Botany of the living plant. Botany. Fig. 357- |] Fertilisation of the Peronosporeae. i. Peronospora parasitica, young multi- '; nucleate oogonium (og), and antheridium (aw). 2. Albugo Candida. Oogonium with I' the central, uni-nucleate egg {os), and the fertiUsing tube (a) of the antheridium which I ^ introduces the male nucleus. 3. The same. The fertilised egg (0) surrounded bj^ periplasm (/>). (After Wager. x666.) (From Strasburger.) I : f such an antheridium as is seen in Vaucheria into the polhnodium of the Peronosporeae, is a comparatively sHght one: the latter does not liberate. i
. The fungi which cause plant disease . Plant diseases; Fungi. Fig. 52.—Oospores of Albugo panduranae. 4. A. lepigoni. platensis. 9. A. occidentalis. 1. A. Candida. 2. A. tropica. 5. A. swertia;. 6. A. tragopogonis. 10. A. portulacae. After Wilson 3. A. ipomcesD- 7. A. bliti. 8. A. The conidia in germination usually produce several ovate zoospores with two unequal, lateral cilia. After a brief period of motility they became walled and produced germ tubes capable of mfectmg susceptible hosts. The oospores after a period of rest. Please note that these images are extracted from scanned page imag Stock Photo
RMPG4H0Y–. The fungi which cause plant disease . Plant diseases; Fungi. Fig. 52.—Oospores of Albugo panduranae. 4. A. lepigoni. platensis. 9. A. occidentalis. 1. A. Candida. 2. A. tropica. 5. A. swertia;. 6. A. tragopogonis. 10. A. portulacae. After Wilson 3. A. ipomcesD- 7. A. bliti. 8. A. The conidia in germination usually produce several ovate zoospores with two unequal, lateral cilia. After a brief period of motility they became walled and produced germ tubes capable of mfectmg susceptible hosts. The oospores after a period of rest. Please note that these images are extracted from scanned page imag
Diseases of truck crops Diseases of truck crops / Ralph E. Smith diseasesoftruckc119smit Year: 1940 im - ji. Fig. 23.—Cauliflower plants affected by root rot in a low, wet corner of the field. fected plants is the only method known at present for holding these virus diseases in check. White Rust.—In this disease, the stems, leaves, or flower stalks may be swollen and deformed. White, blisterlike, spore pustules of the fungus. Albugo Candida, appear on the surface. The disease is not often serious, but is most common on radish and certain cruciferous weeds like shep- herd's purse. Affecte Stock Photo
RMT1H6BX–Diseases of truck crops Diseases of truck crops / Ralph E. Smith diseasesoftruckc119smit Year: 1940 im - ji. Fig. 23.—Cauliflower plants affected by root rot in a low, wet corner of the field. fected plants is the only method known at present for holding these virus diseases in check. White Rust.—In this disease, the stems, leaves, or flower stalks may be swollen and deformed. White, blisterlike, spore pustules of the fungus. Albugo Candida, appear on the surface. The disease is not often serious, but is most common on radish and certain cruciferous weeds like shep- herd's purse. Affecte
. Fig. 33. Diseases of the Cauliflower and Radish. a. Spot disease of cauliflower (after McCuUoch), b. white rust of radish, c. conidio- phore of the white rust fungus, Cystopus candidus, d. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head. g. perithecium of Mycosphcerella brassicicola, h. ascus of MycosphcrrcUa brassicicola, i. ascospores of Mycosphmrella brassicicola (g. to i. after Osmun and Anderson). Stock Photo
RMMCKWKD–. Fig. 33. Diseases of the Cauliflower and Radish. a. Spot disease of cauliflower (after McCuUoch), b. white rust of radish, c. conidio- phore of the white rust fungus, Cystopus candidus, d. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head. g. perithecium of Mycosphcerella brassicicola, h. ascus of MycosphcrrcUa brassicicola, i. ascospores of Mycosphmrella brassicicola (g. to i. after Osmun and Anderson).
. Fundamentals of botany. Botany. 292 STRUCTURE AND LIFE HISTORIES This fungus is known as Albugo Candida, or more recently as Cystopus candidus. 4. Downy mildew of grapes and cucumbers.. Fig. 214.—Witches' brooms on the hackberry {Celtis occidenlalis), caused by a gall-mite {Phytoptus Sp.), or possibly by the mite in conjunc- tion with a powdery mildew {Sphcerotheca phytoptophyla), which is usually found on the "brooms." 5. Potato rot and "late blight," Phytophthora injestans (Mont). DeBary. This disease was the cause of the failure of the potato crop and the consequent fa Stock Photo
RMRE2FHM–. Fundamentals of botany. Botany. 292 STRUCTURE AND LIFE HISTORIES This fungus is known as Albugo Candida, or more recently as Cystopus candidus. 4. Downy mildew of grapes and cucumbers.. Fig. 214.—Witches' brooms on the hackberry {Celtis occidenlalis), caused by a gall-mite {Phytoptus Sp.), or possibly by the mite in conjunc- tion with a powdery mildew {Sphcerotheca phytoptophyla), which is usually found on the "brooms." 5. Potato rot and "late blight," Phytophthora injestans (Mont). DeBary. This disease was the cause of the failure of the potato crop and the consequent fa
. Fig. 23.—Cauliflower plants affected by root rot in a low, wet corner of the field. fected plants is the only method known at present for holding these virus diseases in check. White Rust.—In this disease, the stems, leaves, or flower stalks may be swollen and deformed. White, blisterlike, spore pustules of the fungus. Albugo Candida, appear on the surface. The disease is not often serious, but is most common on radish and certain cruciferous weeds like shep- herd's purse. Affected plants should be destroyed. Yellows.—This is a very serious disease of cabbage in many parts of the country but Stock Photo
RMMCKWF9–. Fig. 23.—Cauliflower plants affected by root rot in a low, wet corner of the field. fected plants is the only method known at present for holding these virus diseases in check. White Rust.—In this disease, the stems, leaves, or flower stalks may be swollen and deformed. White, blisterlike, spore pustules of the fungus. Albugo Candida, appear on the surface. The disease is not often serious, but is most common on radish and certain cruciferous weeds like shep- herd's purse. Affected plants should be destroyed. Yellows.—This is a very serious disease of cabbage in many parts of the country but
. Diseases of truck crops and their control . Vegetables. Fig. 33. Diseases of the Cauliflower and Radish. a. spot disease of cauliflower (after McCulloch), 6, white rust of radish, c. conidio- phore of the white rust fungus, Cystopus candidus, <i. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head, g. perithecium of Mycosphmrella brassicicola, h. ascus of Mycospk<Erella brassicicola, i. ascospores of MycosphtBreUa brassicicola (g. to i. after Osmun and Anderson).. Please note that these images are extracted from scanned pag Stock Photo
RMRDE0G1–. Diseases of truck crops and their control . Vegetables. Fig. 33. Diseases of the Cauliflower and Radish. a. spot disease of cauliflower (after McCulloch), 6, white rust of radish, c. conidio- phore of the white rust fungus, Cystopus candidus, <i. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head, g. perithecium of Mycosphmrella brassicicola, h. ascus of Mycospk<Erella brassicicola, i. ascospores of MycosphtBreUa brassicicola (g. to i. after Osmun and Anderson).. Please note that these images are extracted from scanned pag
. Flg. 95. Albugo Candida (Persoon). Oosporenbildung. A Mycel mit jungen Oo- Fig. 96. Albngo Portulacae (De gonien; 5 Befruchtung; C, D Oospore; E, i^Schwärrasporenbildung; 6 Schwärm- C'and.), Conidien (300/1). (Nach Sporen, og Oogon, an Anthendium, os Oosphäre und Oospore, i Endospore (400/1). D e B ary.) (Nach De Bary.) i / ^ j > nannter »weißer Rost« an Stengeln, Blättern und Blülenorganen vor. Der Pilz veranlasst Auftreibungen der Stengel und eigentümliche Blütenmetamorphosen, bestehend in Ver- Stock Photo
RMMCTK5B–. Flg. 95. Albugo Candida (Persoon). Oosporenbildung. A Mycel mit jungen Oo- Fig. 96. Albngo Portulacae (De gonien; 5 Befruchtung; C, D Oospore; E, i^Schwärrasporenbildung; 6 Schwärm- C'and.), Conidien (300/1). (Nach Sporen, og Oogon, an Anthendium, os Oosphäre und Oospore, i Endospore (400/1). D e B ary.) (Nach De Bary.) i / ^ j > nannter »weißer Rost« an Stengeln, Blättern und Blülenorganen vor. Der Pilz veranlasst Auftreibungen der Stengel und eigentümliche Blütenmetamorphosen, bestehend in Ver-
. Botany of the living plant. Botany. 422 BOTANY OF THE LIVING PLANT through the air. But it shows its real nature on germination by pro- ducing zoospores which are Hberated in water. The modification of. Fig. 357- |] Fertilisation of the Peronosporeae. i. Peronospora parasitica, young multi- '; nucleate oogonium (og), and antheridium (aw). 2. Albugo Candida. Oogonium with I' the central, uni-nucleate egg {os), and the fertiUsing tube (a) of the antheridium which I ^ introduces the male nucleus. 3. The same. The fertilised egg (0) surrounded bj^ periplasm (/>). (After Wager. x666.) (From St Stock Photo
RMRH8EF5–. Botany of the living plant. Botany. 422 BOTANY OF THE LIVING PLANT through the air. But it shows its real nature on germination by pro- ducing zoospores which are Hberated in water. The modification of. Fig. 357- |] Fertilisation of the Peronosporeae. i. Peronospora parasitica, young multi- '; nucleate oogonium (og), and antheridium (aw). 2. Albugo Candida. Oogonium with I' the central, uni-nucleate egg {os), and the fertiUsing tube (a) of the antheridium which I ^ introduces the male nucleus. 3. The same. The fertilised egg (0) surrounded bj^ periplasm (/>). (After Wager. x666.) (From St
. gig. E. l. Achlya racemosa, (5d)toärmft)or<mgiett, Dogomen unb ^Cnt^ertbien 2. Dictyuchus monosporus, ©d)toärtnf.porcmgicn. 3. Leptomitus lacteus. 4. Py thium de Baryanum. a) Sunge ©tfjtoärmfporanflien, b) austreten ber (Sdötüärm* froren, c) öojporen unb Sinti) eribten. 5. Albugo Candida, a) bombiert, b) 1—3 ©djtoärmfporen&iibunß ctu§ ben bombten, c) Befruchtung ber (Siäette, d) Keimung ber Cofpore. 6. Phytophthora infestans, ®onibienträger. 7. Plasmopara viticola Sronibienträger. (2Ule§ natf) @ngler = $rantl, Wal ^flan^enfam.) Sinbau, «ßUje. 4 Stock Photo
RMMCR8CH–. gig. E. l. Achlya racemosa, (5d)toärmft)or<mgiett, Dogomen unb ^Cnt^ertbien 2. Dictyuchus monosporus, ©d)toärtnf.porcmgicn. 3. Leptomitus lacteus. 4. Py thium de Baryanum. a) Sunge ©tfjtoärmfporanflien, b) austreten ber (Sdötüärm* froren, c) öojporen unb Sinti) eribten. 5. Albugo Candida, a) bombiert, b) 1—3 ©djtoärmfporen&iibunß ctu§ ben bombten, c) Befruchtung ber (Siäette, d) Keimung ber Cofpore. 6. Phytophthora infestans, ®onibienträger. 7. Plasmopara viticola Sronibienträger. (2Ule§ natf) @ngler = $rantl, Wal ^flan^enfam.) Sinbau, «ßUje. 4
. Comparative morphology of Fungi. Fungi. Fig. 46.—Albugo Candida. 1 to 4. Formation of conidia. Albugo Portulacae. 5. Catenu- late conidia. (1 to 4 X 900; after Bary and Rosen.) clavate and closely covered with numerous small processes, each of which cuts off a conidium (Fig. 47, a); in this manner, there arises on a single conidiophore a large number of spores. Also in Bremia the tips of the branches are swollen and covered with short processes. In the other genera there appears a tendency to repeated branching. In some species of Plasmopara (Fig. 48, A) and in part in Sclerospora, there is Stock Photo
RMREE47H–. Comparative morphology of Fungi. Fungi. Fig. 46.—Albugo Candida. 1 to 4. Formation of conidia. Albugo Portulacae. 5. Catenu- late conidia. (1 to 4 X 900; after Bary and Rosen.) clavate and closely covered with numerous small processes, each of which cuts off a conidium (Fig. 47, a); in this manner, there arises on a single conidiophore a large number of spores. Also in Bremia the tips of the branches are swollen and covered with short processes. In the other genera there appears a tendency to repeated branching. In some species of Plasmopara (Fig. 48, A) and in part in Sclerospora, there is
. The essentials of botany. Botany. PHTCOPHTTA. 157 (Ji) White Rusts occur on many plants: one (Albugo Candida) on sliepherd's-purse, peppergrass, radish, etc.; another (A. bliti) on Amaranthus ; and another (A. portulacse) on purslane. For conidia make very thin cross-sections of leaves, through a white-rust spot, and mount as above. The resting-spores (vphich are dark brown) are easily obtained in the leaves of Amaranthus and purslane. Systematic Literature.—Wolle, Freshwater Algae of the United States, 146-154. Saccardo, Sylloge Fun^orum, 7'. Flora of Ne- braska, 1 : 53-60, pi. IS, 13, 15, Stock Photo
RMRDYC38–. The essentials of botany. Botany. PHTCOPHTTA. 157 (Ji) White Rusts occur on many plants: one (Albugo Candida) on sliepherd's-purse, peppergrass, radish, etc.; another (A. bliti) on Amaranthus ; and another (A. portulacse) on purslane. For conidia make very thin cross-sections of leaves, through a white-rust spot, and mount as above. The resting-spores (vphich are dark brown) are easily obtained in the leaves of Amaranthus and purslane. Systematic Literature.—Wolle, Freshwater Algae of the United States, 146-154. Saccardo, Sylloge Fun^orum, 7'. Flora of Ne- braska, 1 : 53-60, pi. IS, 13, 15,
. Cryptogamen. B. Fig. 271. ^1 Oberflächenansicht der Blattepidermis von Solanum tuberosum mit den aus den Sjniltntthungen hervor- tretenden Sporangienträgern der Phyto- phthora infestans. Vergr. 90. B ein reifes Sporangiuiii. (J ein solches mit getheilteni Iidudt. D eine Schwärm- spore. B—D Vergr. 540. Fig. 272. Befruchtung der Peronosporeen. iPerono- spora parasitica. Junges vielkernigcs Oogoninm og und Antheridium an. 2 Albugo Candida. Oogo- ninm mit der centralen einkernigen Oosphäre und dem Befruchtungsschlauch a des Antheridinm, welcher den männlichen Kern einführt. 3 desgl. Befruchtete Stock Photo
RMRE591T–. Cryptogamen. B. Fig. 271. ^1 Oberflächenansicht der Blattepidermis von Solanum tuberosum mit den aus den Sjniltntthungen hervor- tretenden Sporangienträgern der Phyto- phthora infestans. Vergr. 90. B ein reifes Sporangiuiii. (J ein solches mit getheilteni Iidudt. D eine Schwärm- spore. B—D Vergr. 540. Fig. 272. Befruchtung der Peronosporeen. iPerono- spora parasitica. Junges vielkernigcs Oogoninm og und Antheridium an. 2 Albugo Candida. Oogo- ninm mit der centralen einkernigen Oosphäre und dem Befruchtungsschlauch a des Antheridinm, welcher den männlichen Kern einführt. 3 desgl. Befruchtete
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PHYCOMYCETES 149 X. WHITE "RUST" OF CRUCIFERS Cystopus candidus (Pers.) LeV. Davis, B. M. The Fertilization of Albugo Candida. Bot. Gaz. 29: 296-310. pi. 22. 1900. Wager, H. On the Structure and Reproduction of Cystopus candidus Lev. Ann. Bot. 10: 295-339. pis. 23, 26. 1895. Zalewski, A. Zur Kenntniss der Gattung Cystopus Lev. Bot. Centrbl. 15 : 215-224. 1883.. Fig. 49. Flowers and Peduncles of Radish deformed by Cystopus (Photograph by II. H. Whetzel) The common white &q Stock Photo
RMRDJFP7–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. PHYCOMYCETES 149 X. WHITE "RUST" OF CRUCIFERS Cystopus candidus (Pers.) LeV. Davis, B. M. The Fertilization of Albugo Candida. Bot. Gaz. 29: 296-310. pi. 22. 1900. Wager, H. On the Structure and Reproduction of Cystopus candidus Lev. Ann. Bot. 10: 295-339. pis. 23, 26. 1895. Zalewski, A. Zur Kenntniss der Gattung Cystopus Lev. Bot. Centrbl. 15 : 215-224. 1883.. Fig. 49. Flowers and Peduncles of Radish deformed by Cystopus (Photograph by II. H. Whetzel) The common white &q
. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet. Botany. Fig. t)4. Albugo Candida {Veisoon). B Coiiidienträger; C, Z> Scliwänn- sporenbildung; E Schwärmsporen isoliert; P Keimung; 0 einkei- mende Keimscliläuche (400/1). (Nach De Bary.). 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.. Engler, Stock Photo
RMRCHRJ5–. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet. Botany. Fig. t)4. Albugo Candida {Veisoon). B Coiiidienträger; C, Z> Scliwänn- sporenbildung; E Schwärmsporen isoliert; P Keimung; 0 einkei- mende Keimscliläuche (400/1). (Nach De Bary.). 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.. Engler,
. Diseases of truck crops and their control. Vegetables. Fig. 33. Diseases of the Cauliflower axd Radish. a. Spot disease of cauliflower (after McCuIloch), b. white rust of radish, c. conidio- phore of the white rust fungus, Cyslopus candidus, d. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head, g! perithecium of Mycospho'reUa brassicicola, h. ascus of Mycospha-rella brassicicola, i. ascospores of Mycosphcerella brassicicola {g. to i. after Osmun and Anderson).. Please note that these images are extracted from scanned page image Stock Photo
RMRCCKFE–. Diseases of truck crops and their control. Vegetables. Fig. 33. Diseases of the Cauliflower axd Radish. a. Spot disease of cauliflower (after McCuIloch), b. white rust of radish, c. conidio- phore of the white rust fungus, Cyslopus candidus, d. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head, g! perithecium of Mycospho'reUa brassicicola, h. ascus of Mycospha-rella brassicicola, i. ascospores of Mycosphcerella brassicicola {g. to i. after Osmun and Anderson).. Please note that these images are extracted from scanned page image
. Diseases of truck crops and their control. Plants -- Diseases. Fig. 33. Diseases of the Cauliflower and Radish. a. Spot disease of cauliflower (after McCuUoch), b. white rust of radish, c. conidio- phore of the white rust fungus, Cystopus candidus, d. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head. g. perithecium of Mycosphcerella brassicicola, h. ascus of MycosphcrrcUa brassicicola, i. ascospores of Mycosphmrella brassicicola (g. to i. after Osmun and Anderson).. Please note that these images are extracted from scanned page Stock Photo
RMRCCKD9–. Diseases of truck crops and their control. Plants -- Diseases. Fig. 33. Diseases of the Cauliflower and Radish. a. Spot disease of cauliflower (after McCuUoch), b. white rust of radish, c. conidio- phore of the white rust fungus, Cystopus candidus, d. fertilization in Albugo Candida, e. germination of the oospore of Albugo Candida, f. ring spot on cauliflower head. g. perithecium of Mycosphcerella brassicicola, h. ascus of MycosphcrrcUa brassicicola, i. ascospores of Mycosphmrella brassicicola (g. to i. after Osmun and Anderson).. Please note that these images are extracted from scanned page
. Diseases of truck crops / Ralph E. Smith. Plant diseases; Plant parasites; Vegetables; Agricultural pests. im -^ j^i.. Fig. 23.—Cauliflower plants affected by root rot in a low, wet corner of the field. fected plants is the only method known at present for holding these virus diseases in check. White Rust.—In this disease, the stems, leaves, or flower stalks may be swollen and deformed. White, blisterlike, spore pustules of the fungus. Albugo Candida, appear on the surface. The disease is not often serious, but is most common on radish and certain cruciferous weeds like shep- herd's purse. A Stock Photo
RMRCCK88–. Diseases of truck crops / Ralph E. Smith. Plant diseases; Plant parasites; Vegetables; Agricultural pests. im -^ j^i.. Fig. 23.—Cauliflower plants affected by root rot in a low, wet corner of the field. fected plants is the only method known at present for holding these virus diseases in check. White Rust.—In this disease, the stems, leaves, or flower stalks may be swollen and deformed. White, blisterlike, spore pustules of the fungus. Albugo Candida, appear on the surface. The disease is not often serious, but is most common on radish and certain cruciferous weeds like shep- herd's purse. A
. Die pilze, eine einfu?hrung in die kenntnis ihrer formenreihen ... Fungi. gig. E. l. Achlya racemosa, (5d)toärmft)or<mgiett, Dogomen unb ^Cnt^ertbien 2. Dictyuchus monosporus, ©d)toärtnf.porcmgicn. 3. Leptomitus lacteus. 4. Py thium de Baryanum. a) Sunge ©tfjtoärmfporanflien, b) austreten ber (Sdötüärm* froren, c) öojporen unb Sinti) eribten. 5. Albugo Candida, a) bombiert, b) 1—3 ©djtoärmfporen&iibunß ctu§ ben bombten, c) Befruchtung ber (Siäette, d) Keimung ber Cofpore. 6. Phytophthora infestans, ®onibienträger. 7. Plasmopara viticola Sronibienträger. (2Ule§ natf) @ngler = $rantl, Stock Photo
RMRCHE97–. Die pilze, eine einfu?hrung in die kenntnis ihrer formenreihen ... Fungi. gig. E. l. Achlya racemosa, (5d)toärmft)or<mgiett, Dogomen unb ^Cnt^ertbien 2. Dictyuchus monosporus, ©d)toärtnf.porcmgicn. 3. Leptomitus lacteus. 4. Py thium de Baryanum. a) Sunge ©tfjtoärmfporanflien, b) austreten ber (Sdötüärm* froren, c) öojporen unb Sinti) eribten. 5. Albugo Candida, a) bombiert, b) 1—3 ©djtoärmfporen&iibunß ctu§ ben bombten, c) Befruchtung ber (Siäette, d) Keimung ber Cofpore. 6. Phytophthora infestans, ®onibienträger. 7. Plasmopara viticola Sronibienträger. (2Ule§ natf) @ngler = $rantl,
. Die gallen der pflanzen, ein lehrbuch für botaniker und entomologen. Galls (Botany). 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). Unter dem Einfluß des Exoascus a?nentorum (auf Alnus incana) werden nach dem Stock Photo
RMRCP11X–. Die gallen der pflanzen, ein lehrbuch für botaniker und entomologen. Galls (Botany). 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). Unter dem Einfluß des Exoascus a?nentorum (auf Alnus incana) werden nach dem
. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet. Botany. Flg. 95. Albugo Candida (Persoon). Oosporenbildung. A Mycel mit jungen Oo- Fig. 96. Albngo Portulacae (De gonien; 5 Befruchtung; C, D Oospore; E, i^Schwärrasporenbildung; 6 Schwärm- C'and.), Conidien (300/1). (Nach Sporen, og Oogon, an Anthendium, os Oosphäre und Oospore, i Endospore (400/1). D e B ary.) (Nach De Bary.) i / ^ j > nannter »weißer Rost« an Stengeln, Blättern und Blülenorganen vor. Der Pilz v Stock Photo
RMRCHRHY–. Die Natürlichen Pflanzenfamilien nebst ihren Gattungen und wichtigeren Arten, insbesondere den Nutzpflanzen, unter Mitwirkung zahlreicher hervorragender Fachgelehrten begründet. Botany. Flg. 95. Albugo Candida (Persoon). Oosporenbildung. A Mycel mit jungen Oo- Fig. 96. Albngo Portulacae (De gonien; 5 Befruchtung; C, D Oospore; E, i^Schwärrasporenbildung; 6 Schwärm- C'and.), Conidien (300/1). (Nach Sporen, og Oogon, an Anthendium, os Oosphäre und Oospore, i Endospore (400/1). D e B ary.) (Nach De Bary.) i / ^ j > nannter »weißer Rost« an Stengeln, Blättern und Blülenorganen vor. Der Pilz v
. Die gallen der pflanzen, ein lehrbuch für botaniker und entomologen. Galls (Botany). -^ Figur 97. Abnorme Vergrößerung und ab- norme Gestalt der Kerne, vielkernige Zel- len, a, Rindenzelle von Ädoxa mosehatellina nach In- fektion' durch Puccinia adoxae; der Kern ist von Hyphenfäden umklammert; s, Cellulosescheiden; 1 Leukoplasten, b, Kern aus der Epidermis einer Galle von Albugo Candida auf Capsella bursa pasians neben einem normalen Zellkern desselben Gewebes; c, Gelappte Kerne aus den Gallen der Uslilago viaydis auf Zea mays; d, Kern mit Kanalsystem aus der Galle des Synchytrium mercuriali Stock Photo
RMRCP126–. Die gallen der pflanzen, ein lehrbuch für botaniker und entomologen. Galls (Botany). -^ Figur 97. Abnorme Vergrößerung und ab- norme Gestalt der Kerne, vielkernige Zel- len, a, Rindenzelle von Ädoxa mosehatellina nach In- fektion' durch Puccinia adoxae; der Kern ist von Hyphenfäden umklammert; s, Cellulosescheiden; 1 Leukoplasten, b, Kern aus der Epidermis einer Galle von Albugo Candida auf Capsella bursa pasians neben einem normalen Zellkern desselben Gewebes; c, Gelappte Kerne aus den Gallen der Uslilago viaydis auf Zea mays; d, Kern mit Kanalsystem aus der Galle des Synchytrium mercuriali
. College botany; structure, physiology and economics of plants. Botany. 276 COLLEGE BOTANY Albugo occurs on many plants; among the most conamon is A. Candida (Fig. 126), which attacks members of the Cruci- ferce. The mycelium lives intercellularly in the-host, drawing its nourishment by means of haustoria which penetrate the host cells. Whitish blisters appear under the epidermis of the host, which eventually breaks, liberating great numbers of conidia. These spores are borne in chains., are multinucleate and give rise. Fig. 125.—Saprolegnia. (a) Infested fly; (6) immature sporangium; (c) mat Stock Photo
RMRE1NA9–. College botany; structure, physiology and economics of plants. Botany. 276 COLLEGE BOTANY Albugo occurs on many plants; among the most conamon is A. Candida (Fig. 126), which attacks members of the Cruci- ferce. The mycelium lives intercellularly in the-host, drawing its nourishment by means of haustoria which penetrate the host cells. Whitish blisters appear under the epidermis of the host, which eventually breaks, liberating great numbers of conidia. These spores are borne in chains., are multinucleate and give rise. Fig. 125.—Saprolegnia. (a) Infested fly; (6) immature sporangium; (c) mat
. The fungi which cause plant disease . Plant diseases; Fungi. Fig. 52.—Oospores of Albugo panduranae. 4. A. lepigoni. platensis. 9. A. occidentalis. 1. A. Candida. 2. A. tropica. 5. A. swertia;. 6. A. tragopogonis. 10. A. portulacae. After Wilson 3. A. ipomcesD- 7. A. bliti. 8. A. The conidia in germination usually produce several ovate zoospores with two unequal, lateral cilia. After a brief period of motility they became walled and produced germ tubes capable of mfectmg susceptible hosts. The oospores after a period of rest. Please note that these images are extracted from scanned page imag Stock Photo
RMRDE6X9–. The fungi which cause plant disease . Plant diseases; Fungi. Fig. 52.—Oospores of Albugo panduranae. 4. A. lepigoni. platensis. 9. A. occidentalis. 1. A. Candida. 2. A. tropica. 5. A. swertia;. 6. A. tragopogonis. 10. A. portulacae. After Wilson 3. A. ipomcesD- 7. A. bliti. 8. A. The conidia in germination usually produce several ovate zoospores with two unequal, lateral cilia. After a brief period of motility they became walled and produced germ tubes capable of mfectmg susceptible hosts. The oospores after a period of rest. Please note that these images are extracted from scanned page imag
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