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Pycnidium Stock Photos and Images
RM2AFJ8AA–. Transactions and proceedings of the Botanical Society of Edinburgh. he genus Phomopsis. Phoma pithyaSacc. {Scleropho7na pithya Died.) has also been stated byRostrup2 to attack the Douglas fir, and this species isconsidered by Lind ^ to be the same as Phoma ahietinaHartig. Phomopsis Pseudotsugae differs from Phomapithya both in the structure of the pycnidium and in theabsence of sporophores in the latter, which, as far as knownat present, is only saprophytic* Specimens of Phomopsis Pseudotsugae have been obtainedfrom various localities in Perthshire, from near Forres, andfrom Argyllshire, Dum
RMPG14MD–. Chestnut blight. Chestnut blight; Chestnut. SS8 Bulletin 347. Fig. 84.â Cross section (diagrammatic) of a mature pycnidium under the cork layer; ostiole not shown. After Heald ,««:â¢..â .â â ;:,.;.:.â ;â¢.â .â â¢â â â â. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. 1906-1960
RMMCK5FC–. Fio. 125.—Lophodermium nervisequium. Section of a needle of Silver Fir. b, Pycnidium on upper surface shedding conidia. n, AjKJthe- cium on the lower surface. (After R. Hartig.)
![Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 66. TOxMato Diseases. a. Septoria leaf spot, b. section through a pycnidium of Septoria lycopersici (after Levin), c. section through acervulus of Colletolrichum phomoides (after Venus Pool), d. anil e. Melanconium rot, /. section through an acervulus of the Melan- conium fungus {d. to f. after Tisdale). Stock Photo](https://c8.alamy.com/comp/T1JJ3W/diseases-of-truck-crops-and-diseases-of-truck-crops-and-their-control-diseasesoftruckc00taubuoft-year-1918-fig-66-toxmato-diseases-a-septoria-leaf-spot-b-section-through-a-pycnidium-of-septoria-lycopersici-after-levin-c-section-through-acervulus-of-colletolrichum-phomoides-after-venus-pool-d-anil-e-melanconium-rot-section-through-an-acervulus-of-the-melan-conium-fungus-d-to-f-after-tisdale-T1JJ3W.jpg "Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 66. TOxMato Diseases. a. Septoria leaf spot, b. section through a pycnidium of Septoria lycopersici (after Levin), c. section through acervulus of Colletolrichum phomoides (after Venus Pool), d. anil e. Melanconium rot, /. section through an acervulus of the Melan- conium fungus {d. to f. after Tisdale). Stock Photo")
RMT1JJ3W–Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 66. TOxMato Diseases. a. Septoria leaf spot, b. section through a pycnidium of Septoria lycopersici (after Levin), c. section through acervulus of Colletolrichum phomoides (after Venus Pool), d. anil e. Melanconium rot, /. section through an acervulus of the Melan- conium fungus {d. to f. after Tisdale).
RM2AJ581W–Fungous diseases of plants . antly on bean pods or stems, as seen in fig-ure . . , producing the pycnidia in a short time, and the pycnidia are then notso definite in form but formed of avery loose stromatic mass. The sub-merged hyphae are dark in color, whilethe aerial growth is dense and white,except the stromatic mass inclosingthe pycnidium. I have had culturesfor eighteen months; and althoughthey have been subjected to variousclimatic conditions, nothing of furtherinterest has as yet come from them.In nature the fungus is being closelywatched for other stages, but I cansay nothing definite
RMPG4GWT–. The fungi which cause plant disease . Plant diseases; Fungi. Fig. 75.—Sphsrotheca castagnei. Fertilization and de- velopment of the perithecium. Og= oogonium, an= antheridium, st= stalk-cell. 6 as the ascogonium derived from the oogonium. After Harper. short, innate; again they are long, loose or floccosc. They may emerge through stomata singly or in tufts or they may form sporo- genous cushions below the epidermis or again they may be borne inside of a hollow structure, the pycnidium, which covers them. Chlamydospores are also found. One or several distinct types of sporification may belong
RMMCK6PT–. Fig. 125.âLophodermium nerciseqv.ium. Section of a needle of Silver Fir. h, Pycnidium on upper surface shedding conidia. o, Apothe- cium on the lower surface. (After R. Hartig.)
RMT1JJ3T–Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taub Year: 1918 .â *r*'>*lX Fig. 66. Tomato Diseases. a. Septoria leaf spot, b. section through a pycnidium of Seploria lycopersiii (after Levin), c. section through acervulus of Collelolrichum phoinnidfs (after Venus Pool), d. and e. Melanconium rot. /. section through an acervulus of the Melan- conium fungus (d. to/, after Tisdale).
RM2AJ586Y–Fungous diseases of plants . Fig. 177. Dilution Culture of Septoria Pyricola which is purplish in color (Fig. 176). These color details are lostin very old leaves, but the black papillae indicating the pycnidiathen show up clearly. At maturity the spores may ooze out in darkuniform cirras. In cross section the pycnidium is clearly ovate inform. The wall is made up of several layers of dark cells, and thehyaline conidiophores arise from an inconspicuous inner layer(Fig. 178). The spores are flexuous and quite constantly two-septate, measuring about 60 X 3-4 /i. The mycelium is intercel-lular, b
RMPG2M58–. Parasitic fungi of Illinois / by T.J. Burrill. Fungi. Parasitic Fungi of Illinois. 391. FiGUEB 2. Cicindbolus Cessatii, DBy.: a the mycelium of Erysiphe galeopsidis, DC, within which is to be sefen the parasitic mycelium 6 of Oidnoblus; c, c, c different stages of the so-called pycnidium in which the spores of the parasite are developed. Magnified 300 times. (After De Bary.) Fig. 2. This frequently develops in one of the cells of a conidio- phore, in which case the shriveled upper portion remains as a kind of appendage. In other cases it is developed directly from the mycelium. Occasionally,
RMMCK7YH–. Fig. 2. a. Effect of a balanced fertilizer on corn and clover, b, various organisms isolated from a soil particle, c. types of bacteria, Coccus, Bacillus and Spirilla (after P. E. Brown); d. pycnidium (after C. L. Shear), e. conidiophores of Penicillium.
![Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 65. Tomato Diseases. a. Various forms of vegetative cells of the yeast rot fungus, 6. ascus, .-. ascosporet of the yeast rot fungus (a. to c. after Schneider), d. Phoma rot on foliage, c. Phoma rot on fruit,/, pycnidium of the Phoma rot organism, g. cross-section of a pycnidium of the Phoma fungus, h. mycelium, «. pycnospores of same {d. to i. after Jamieson). Stock Photo](https://c8.alamy.com/comp/T1JJ2E/diseases-of-truck-crops-and-diseases-of-truck-crops-and-their-control-diseasesoftruckc00taubuoft-year-1918-fig-65-tomato-diseases-a-various-forms-of-vegetative-cells-of-the-yeast-rot-fungus-6-ascus-ascosporet-of-the-yeast-rot-fungus-a-to-c-after-schneider-d-phoma-rot-on-foliage-c-phoma-rot-on-fruit-pycnidium-of-the-phoma-rot-organism-g-cross-section-of-a-pycnidium-of-the-phoma-fungus-h-mycelium-pycnospores-of-same-d-to-i-after-jamieson-T1JJ2E.jpg "Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 65. Tomato Diseases. a. Various forms of vegetative cells of the yeast rot fungus, 6. ascus, .-. ascosporet of the yeast rot fungus (a. to c. after Schneider), d. Phoma rot on foliage, c. Phoma rot on fruit,/, pycnidium of the Phoma rot organism, g. cross-section of a pycnidium of the Phoma fungus, h. mycelium, «. pycnospores of same {d. to i. after Jamieson). Stock Photo")
RMT1JJ2E–Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 65. Tomato Diseases. a. Various forms of vegetative cells of the yeast rot fungus, 6. ascus, .-. ascosporet of the yeast rot fungus (a. to c. after Schneider), d. Phoma rot on foliage, c. Phoma rot on fruit,/, pycnidium of the Phoma rot organism, g. cross-section of a pycnidium of the Phoma fungus, h. mycelium, «. pycnospores of same {d. to i. after Jamieson).
RM2AJ5919–Fungous diseases of plants . ithin the tissues. It penetrates the bark readily but may not ^%^ >; S-- to ^ ^^ -^ ^^^k. ^^^^bVa^^^H^^ rv* ^rA *^ ^ ^^^Hk^-3 ^ > 1 *--^^ ii^ ^^PEt^ f r / - n - -- Fig. 171. Sph.-eropsis Malorum: Mature Pycnidium. (Photographof a drawing by F. C. Stewart) extend far into the wood. The pycnidia are erumpent, usually sur-rounded by a broken epidermis (Fig. i/i) ^^^ they appear incross section somewhat depressed-conical at the apex. The sporesare oblong-elliptical, brown, and usually about twice as long asbroad, measuring in general 22-32 x 10-14/a. It has bee
RMPG4EMX–. Diseases of economic plants . Plant diseases. 224 DISEASES OF ECONOMIC PLANTS ease appears and often enough thereafter to cover growing parts, is recommended.' Phyllostictose (Phyllostida cucurbitacearum Sacc.) • — Th is leaf spot has been destructive in several states, notably so in New Jersey and Ohio. The spots are light colored and the fungus appears as a pycnidium in their centers. Cladosporiose. See cucumber. CARROT Soft rot, bacillose (Bacillus carotovorus Jones ^).— In Ver- mont serious loss from rotting of carrots was reported to the Experiment Station in 1898. Investigation by Jone
RMMCKWJ9–. Fig. 66. Tomato Diseases. a. Septoria leaf spot, b. section through a pycnidium of Seploria lycopersiii (after Levin), c. section through acervulus of Collelolrichum phoinnidfs (after Venus Pool), d. and e. Melanconium rot. /. section through an acervulus of the Melan- conium fungus (d. to/, after Tisdale).
![Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 26. Sweet Potato Diseases. a. Black rot at place of a bruise, 6. black shank, c. showing a pycnidium of the black rot fungus, d. dry rot, e. cross section throug'i /, to show the effect of the disease on the root. /. Java black rot surface view, showing strings of spores oozing out from the center of spot, g. cross section through diseased sweet potato root to show pycnidia of the fungus Diplodia tubericola. Stock Photo](https://c8.alamy.com/comp/T1H0C3/diseases-of-truck-crops-and-diseases-of-truck-crops-and-their-control-diseasesoftruckc00taubuoft-year-1918-fig-26-sweet-potato-diseases-a-black-rot-at-place-of-a-bruise-6-black-shank-c-showing-a-pycnidium-of-the-black-rot-fungus-d-dry-rot-e-cross-section-througi-to-show-the-effect-of-the-disease-on-the-root-java-black-rot-surface-view-showing-strings-of-spores-oozing-out-from-the-center-of-spot-g-cross-section-through-diseased-sweet-potato-root-to-show-pycnidia-of-the-fungus-diplodia-tubericola-T1H0C3.jpg "Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 26. Sweet Potato Diseases. a. Black rot at place of a bruise, 6. black shank, c. showing a pycnidium of the black rot fungus, d. dry rot, e. cross section throug'i /, to show the effect of the disease on the root. /. Java black rot surface view, showing strings of spores oozing out from the center of spot, g. cross section through diseased sweet potato root to show pycnidia of the fungus Diplodia tubericola. Stock Photo")
RMT1H0C3–Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 26. Sweet Potato Diseases. a. Black rot at place of a bruise, 6. black shank, c. showing a pycnidium of the black rot fungus, d. dry rot, e. cross section throug'i /, to show the effect of the disease on the root. /. Java black rot surface view, showing strings of spores oozing out from the center of spot, g. cross section through diseased sweet potato root to show pycnidia of the fungus Diplodia tubericola.
RM2ANAK90–A text-book of mycology and plant pathology . Fig. 105.—Septoria leaf spot disease of celery, or celery blight. {After Coons, G. N.and Levin, Ezra, Spec. Bull. 77, Mich. Agric. Coll. Exper. Stat., March. 1916. SPORES,. Fig. 106.—Section through leaf spot of celery blight (Septoria) showing hyphae)in leaf tissue and pycnidium with exuding pycnospores. (After Coons, G. H., andLevin, Ezra, Spec. Bull. 77, Mich. Agric. Coll. Exper. Stat., March, 1916.) 264 MYCOLOGY eludes the fungi which cause the leaf spot of the pear, Septoria pyricola,the late blight of the celery S. petroselini (Figs. 105 and
RMPG4BMX–. Diseases of plants induced by cryptogamic parasites : introduction to the study of pathogenic Fungi, slime-Fungi, bacteria, & Algae . Plant diseases; Parasitic plants; Fungi. Fio. 104. —Sphaerella laricina. Section through a diseased larch needle in June after it has lain on the ground from the previous year. The mycelium is thick, thick-walled, and of a light-brown colour. The perithecia contain asci and asco- spores. To the extreme right is a pycnidium containing little oblong conidia, alongside a perithecium. x ^-^. (After R. Hartig.) for distribution by means of conidia. As, however,
RMMCKWGW–. Fig. 66. TOxMato Diseases. a. Septoria leaf spot, b. section through a pycnidium of Septoria lycopersici (after Levin), c. section through acervulus of Colletolrichum phomoides (after Venus Pool), d. anil e. Melanconium rot, /. section through an acervulus of the Melan- conium fungus {d. to f. after Tisdale).
![Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] Fig. dT.—Koitllinia radiciperda. i, ascigerous condition ; 2, peiilhccia : 3, section of same; 4, ascus containing 8 spores, also two parapliyso; 5. tip of an ascus after treatment with iodine, showing the arrangement for effecting the opening of the ascus for escape of spores ; 6, a-cospores, one germinating; 7, brown mycelium with swellings; 8, black sclerotiiim bearing a cluster of conidial fruit ; 9, a single conidiophore; 10, conidia ; II, pycnidium ; 12, stylospores from s Stock Photo](https://c8.alamy.com/comp/T1H0MM/diseases-of-cultivated-plants-and-diseases-of-cultivated-plants-and-trees-diseasesofcultiv00massuoft-year-1910-fig-dtkoitllinia-radiciperda-i-ascigerous-condition-2-peiilhccia-3-section-of-same-4-ascus-containing-8-spores-also-two-parapliyso-5-tip-of-an-ascus-after-treatment-with-iodine-showing-the-arrangement-for-effecting-the-opening-of-the-ascus-for-escape-of-spores-6-a-cospores-one-germinating-7-brown-mycelium-with-swellings-8-black-sclerotiiim-bearing-a-cluster-of-conidial-fruit-9-a-single-conidiophore-10-conidia-ii-pycnidium-12-stylospores-from-s-T1H0MM.jpg "Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] Fig. dT.—Koitllinia radiciperda. i, ascigerous condition ; 2, peiilhccia : 3, section of same; 4, ascus containing 8 spores, also two parapliyso; 5. tip of an ascus after treatment with iodine, showing the arrangement for effecting the opening of the ascus for escape of spores ; 6, a-cospores, one germinating; 7, brown mycelium with swellings; 8, black sclerotiiim bearing a cluster of conidial fruit ; 9, a single conidiophore; 10, conidia ; II, pycnidium ; 12, stylospores from s Stock Photo")
RMT1H0MM–Diseases of cultivated plants and Diseases of cultivated plants and trees diseasesofcultiv00massuoft Year: [1910?] Fig. dT.—Koitllinia radiciperda. i, ascigerous condition ; 2, peiilhccia : 3, section of same; 4, ascus containing 8 spores, also two parapliyso; 5. tip of an ascus after treatment with iodine, showing the arrangement for effecting the opening of the ascus for escape of spores ; 6, a-cospores, one germinating; 7, brown mycelium with swellings; 8, black sclerotiiim bearing a cluster of conidial fruit ; 9, a single conidiophore; 10, conidia ; II, pycnidium ; 12, stylospores from s
RM2ANANAB–A text-book of mycology and plant pathology . Fig. 104.— Microscopic characters of apple blotch fungus {Phylloslicla solitaria).I,vertical section of pycnidium showing pycnospores; 2, 3, 4, 5, mature pycnospores;6, 7, 8, germinating spores; 9, mycelium. {After Scott, W M.. and Rarer, J. B., Bull.144, U. S. Bureau of Plant Industry, pi. in, March 16, 1909.) like the damping-off fungus, attacking seedling egg plants near the sur-face of the ground. The most destructive fungus of the genus Sphmrop-sis is S. malorum which causes the decay of apples, quinces and pearsand attacks the stem of the app
![. Diseases of truck crops and their control . Vegetables. S.- '^^15"b«a%s^r". Fig. 66. Tomato Diseases. a. Septoria leaf spot, 6. section through a pycnidium of Sepioria lycopersici (after Levin), c. section through acervulus of Collelotrichum phomoides (after Venus Pool), d. and e. Melanconium rot, /. section through an acervulus of the Melan- conium fungus {d. to f. after Tisdale).. 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 Stock Photo](https://c8.alamy.com/comp/PG4CC1/diseases-of-truck-crops-and-their-control-vegetables-s-15quotbasrquot-fig-66-tomato-diseases-a-septoria-leaf-spot-6-section-through-a-pycnidium-of-sepioria-lycopersici-after-levin-c-section-through-acervulus-of-collelotrichum-phomoides-after-venus-pool-d-and-e-melanconium-rot-section-through-an-acervulus-of-the-melan-conium-fungus-d-to-f-after-tisdale-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-PG4CC1.jpg ". Diseases of truck crops and their control . Vegetables. S.- '^^15"b«a%s^r". Fig. 66. Tomato Diseases. a. Septoria leaf spot, 6. section through a pycnidium of Sepioria lycopersici (after Levin), c. section through acervulus of Collelotrichum phomoides (after Venus Pool), d. and e. Melanconium rot, /. section through an acervulus of the Melan- conium fungus {d. to f. after Tisdale).. 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 Stock Photo")
RMPG4CC1–. Diseases of truck crops and their control . Vegetables. S.- '^^15"b«a%s^r". Fig. 66. Tomato Diseases. a. Septoria leaf spot, 6. section through a pycnidium of Sepioria lycopersici (after Levin), c. section through acervulus of Collelotrichum phomoides (after Venus Pool), d. and e. Melanconium rot, /. section through an acervulus of the Melan- conium fungus {d. to f. after Tisdale).. 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
RMMCK5YE–. Vui. -M'. — fi. l.LMiler-shoot of Spruce, partially killed and defoliated, b, Pycnidia emerging from the rind and the leaf scars (x 5). o, Tormation of conidia inside a pycnidium ( x 240). rf, Spores germinating in water. <, Spores germinating in nutritive gelatine. (After K. Hartig.)
RMT1HH37–Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taub Year: 1918 Fig. 20. Beet Diseases. a. Crown gall, b. scab, c. downy mildew, d. Conidiophore of Pernnospora schachlii arising from a stomate of an infected beet leaf, e. germinating zoospore of P. schach- lii, f. oospore of P. schachlii, g. Cercospora leaf spot (after Halsted), h. conidiophore and conidia of Cercospora belt cola (after Duggar), i. Phoma leaf spot (after Pool and McKay), k. pycnidium of Phoma beta; (after T. Johnson) (J.-/, after PriUieux).
RM2AKRJDF–Annual report of the North Carolina Agricultural Experiment Station . Collecting the data from thelarge pycnidium type in onepolygon, and similarly with thesmall pycnidium type, we have: M= 4.1935 ±0.0247(T= 1.0902 ±0.0174 V.=25.998 ±0.443n=889 Fig. 22.—Ascochyta Chrysanthemi Stevens.gon of spores of large pycnidia. Poly- M= 5.0379 ±0.0335<r= 1.3492 ±0.0237C. V.=26.781 ±0.503n=738 It is seen that there isa tendency throughoutfor the smaller pycnidiato produce larger sporesthan areproduced by thelarge pycnidia. Fig. 23.—Ascochyta Chrysanthemi Stevens,spores of small pycnidia. THIRTY-SECOND A
RMPG46E3–. The fungi which cause plant disease . Plant diseases; Fungi. Fig. 183.—M. citrullina, A. pycnidium (Diplodia) in seo- tion, B, perithecium; C, 3scus and spores. After Grossea- bacber. of small, elliptic, continuous, brown conidia in simple or branched chains. It is the cause of serious disease in Europe, being especially injurious to cereals after a rainy season preceded by a drought and is found also parasitic on pea, apple, raspberry, cycad, agave and as a saprophyte almost anywhere. M. stratifonnans Cobb, affects sugar cane. The perithecial stage alone is known.^^^ Further study is desira
RMMCKWGP–. Fig. 65. Tomato Diseases. a. Various forms of vegetative cells of the yeast rot fungus, 6. ascus, .-. ascosporet of the yeast rot fungus (a. to c. after Schneider), d. Phoma rot on foliage, c. Phoma rot on fruit,/, pycnidium of the Phoma rot organism, g. cross-section of a pycnidium of the Phoma fungus, h. mycelium, «. pycnospores of same {d. to i. after Jamieson).
![Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 20. Beet Diseases. a. Crown gall, b. scab c. downy mildew, d. Conidiophore of Peroyiospora schachlii arising from a stomate of an infected beet leaf, e. germinating zoospore of P. schach- •/• °°?P.O''e 'f - schachlii, g. Cercospora leaf spot (after Halsted), h. conidiophore and conidia of Cercospora belicola (after Duggar), i. Phoma leaf spot (after Pool and McKay), k. pycnidium of Phoma belce (after T. Johnson) {d.-f. after PriUieux). Stock Photo](https://c8.alamy.com/comp/T1HH35/diseases-of-truck-crops-and-diseases-of-truck-crops-and-their-control-diseasesoftruckc00taubuoft-year-1918-fig-20-beet-diseases-a-crown-gall-b-scab-c-downy-mildew-d-conidiophore-of-peroyiospora-schachlii-arising-from-a-stomate-of-an-infected-beet-leaf-e-germinating-zoospore-of-p-schach-poe-f-schachlii-g-cercospora-leaf-spot-after-halsted-h-conidiophore-and-conidia-of-cercospora-belicola-after-duggar-i-phoma-leaf-spot-after-pool-and-mckay-k-pycnidium-of-phoma-belce-after-t-johnson-d-f-after-priuieux-T1HH35.jpg "Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 20. Beet Diseases. a. Crown gall, b. scab c. downy mildew, d. Conidiophore of Peroyiospora schachlii arising from a stomate of an infected beet leaf, e. germinating zoospore of P. schach- •/• °°?P.O''e 'f - schachlii, g. Cercospora leaf spot (after Halsted), h. conidiophore and conidia of Cercospora belicola (after Duggar), i. Phoma leaf spot (after Pool and McKay), k. pycnidium of Phoma belce (after T. Johnson) {d.-f. after PriUieux). Stock Photo")
RMT1HH35–Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 20. Beet Diseases. a. Crown gall, b. scab c. downy mildew, d. Conidiophore of Peroyiospora schachlii arising from a stomate of an infected beet leaf, e. germinating zoospore of P. schach- •/• °°?P.O''e 'f - schachlii, g. Cercospora leaf spot (after Halsted), h. conidiophore and conidia of Cercospora belicola (after Duggar), i. Phoma leaf spot (after Pool and McKay), k. pycnidium of Phoma belce (after T. Johnson) {d.-f. after PriUieux).
RM2AKRKF9–Annual report of the North Carolina Agricultural Experiment Station . Fig. 17.—Ascochyta Chrysanthemi Ste-vens. Polygon of spores from pycnid-ium No. 2, large type. M= 4.4318 ±0.0398o-= .9589 ±0.0281C. V =21.638 ±0.650n =254 Pycnidium No. 3. From a plate bearingone large colony. The whole colony wascharacteristically one of few pycnidia whichwere of large type and light color. Thespores were obtained without any possibilityof the pycnidium being torn, that is, theywere normally ripe spores. M= 3.3848 ±0.0245o= .6714 ±0.0173C. V =19.836 ±0.531n=343 It is seen that these threeseparate pycnidia o
RMPG0RB5–. The fungi which cause plant disease . Plant diseases; Fungi. 498 THE FUNGI WHICH CAUSE PLANT DISEASE Fusicoccum Corda (p. 483) Stroma subepidermal, several-chambered, erumpent, leathery, black; conidia fusoid, straight and usually large. Some forty species, several of which are regarded as conidial forms of Diaporthe and Gnomonia. F. veronense Massal on Sycamore and Oak=Gnomonia veneta. See p. 274. F. viticolum Red. on grape=Cryptosporella viticola. See p. 280. 0?^. Fig. 343.—F. viticolum, compound pycnidium, germinating spores, pa- raphyses. After Reddick. F. amygdali Del. causes a spot dis
RMMCK9NB–. Fig. 212. — Conidia and conidiophore of powdery mil- dew. Fig. 213. A pycnidium. Redrawn after Quartance and Shear. the pathologist, for they may reveal a vulnerable point of attack in the life history of the parasite. Bacteria, physiologically, are much like fungi, but their bodies are single-celled and not threadlike (Fig. 214). They are very small, — one of ordinary size is about 0.001 mm. long (^ inch); yet they multiply with such rapidity (one produces a progeny of
![Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 6i. Potato Diseases. a. Black wart (after Gussow), b. late blight on foliage, c. late blight on tuber, d. successive stages of the development of the conidia of Phyiophthora infestans (b. and d. after L. R. Jones), e. germination of conidia of Phytophlhora infestayis, bv means of zoopores (after Ward),/, mature oogonium of P. infestans (after Clinton)'. R. melters. surface view, early stage of infection, h. pycnidium of Phoma tuberose (after Melhus and Rosenbaum). Stock Photo](https://c8.alamy.com/comp/T1HY5W/diseases-of-truck-crops-and-diseases-of-truck-crops-and-their-control-diseasesoftruckc00taubuoft-year-1918-fig-6i-potato-diseases-a-black-wart-after-gussow-b-late-blight-on-foliage-c-late-blight-on-tuber-d-successive-stages-of-the-development-of-the-conidia-of-phyiophthora-infestans-b-and-d-after-l-r-jones-e-germination-of-conidia-of-phytophlhora-infestayis-bv-means-of-zoopores-after-ward-mature-oogonium-of-p-infestans-after-clinton-r-melters-surface-view-early-stage-of-infection-h-pycnidium-of-phoma-tuberose-after-melhus-and-rosenbaum-T1HY5W.jpg "Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 6i. Potato Diseases. a. Black wart (after Gussow), b. late blight on foliage, c. late blight on tuber, d. successive stages of the development of the conidia of Phyiophthora infestans (b. and d. after L. R. Jones), e. germination of conidia of Phytophlhora infestayis, bv means of zoopores (after Ward),/, mature oogonium of P. infestans (after Clinton)'. R. melters. surface view, early stage of infection, h. pycnidium of Phoma tuberose (after Melhus and Rosenbaum). Stock Photo")
RMT1HY5W–Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 6i. Potato Diseases. a. Black wart (after Gussow), b. late blight on foliage, c. late blight on tuber, d. successive stages of the development of the conidia of Phyiophthora infestans (b. and d. after L. R. Jones), e. germination of conidia of Phytophlhora infestayis, bv means of zoopores (after Ward),/, mature oogonium of P. infestans (after Clinton)'. R. melters. surface view, early stage of infection, h. pycnidium of Phoma tuberose (after Melhus and Rosenbaum).
RM2AKRM74–Annual report of the North Carolina Agricultural Experiment Station . Fig. 16.—Ascochyta Chrysanthemi Stevens.Polygon of spores from pycnidium No. 1, largetype. 3 should cover 20 squares instead of 25. division equal 3.7 jjl. VARIATION OF FUNGI DUE TO ENVIRONMENT. Pycnidium No. 2. Large type.. Fig. 17.—Ascochyta Chrysanthemi Ste-vens. Polygon of spores from pycnid-ium No. 2, large type. M= 4.4318 ±0.0398o-= .9589 ±0.0281C. V =21.638 ±0.650n =254 Pycnidium No. 3. From a plate bearingone large colony. The whole colony wascharacteristically one of few pycnidia whichwere of large type and light co
RMPG15NW–. Chestnut blight. Chestnut blight; Chestnut. Bui. 380, U. S. Dept of Agriculture. Plate XIV.. ENDOTHIA FLUENS. VERTICAL SECTIONS. X 49. Fig. 1 .—Simple Pycnidium with Very Little Stroma, from Italy. Fig. 2.—Stroma FROM Italy, Showing a Perithecium above a Pycnidium. Fig. 3.—Stroma from America, Showing a Mature Pycnidium and Perithecia Side by Side. Fig. 4.— Stroma, Showing a Single Pycnidium and Fundaments of Perithecia below.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illust
RMMCKWM7–. Fig. 26. Sweet Potato Diseases. a. Black rot at place of a bruise, 6. black shank, c. showing a pycnidium of the black rot fungus, d. dry rot, e. cross section throug'i /, to show the effect of the disease on the root. /. Java black rot surface view, showing strings of spores oozing out from the center of spot, g. cross section through diseased sweet potato root to show pycnidia of the fungus Diplodia tubericola.
RMT1GP6J–Diseases of glasshouse plants (1923) Diseases of glasshouse plants diseasesofglassh1923bewl Year: 1923 DISEASES DUE TO FUNGI 55 spores, which are highly resistant to external conditions and carry over the disease from one season to another. Sometimes the spores are enclosed in tiny flask-Uke structures buried more or less deeply in the leaf, stem, or fruit tissues, and being thus protected are able to â y-( Fig. 3. (a) Hj'phfe, (6) thin-walled ' Buramer ' spores, (c) thick-walled resting spore, (d) a pycnidium, (e) a perithecium, (J) ascus containing eight ascospores. resist abnormal cond
RM2AKRK21–Annual report of the North Carolina Agricultural Experiment Station . Fig. is.—Ascochyta Chrysanthemi Stevens.gon of spores from pycnidium No. 3, large type. Poly- 64 THIRTY-SECOND ANNUAL REPORT, 1909. B. Spores from small pycnidium type (Fig. 14). Pycnidium No. 4. Small type. M= 3.6011+0.0363a= .7183 + 0.0256 C.V.=19.947 +0.740n=178 HI Fig. 19.—Ascochyta Chrysanthemi Ste-vens. Polygon of spores from pycnidiumNo. 4, small type. Pycnidium No. 5. Spores taken from smallpycnidium colony shownin Fig. 14. M= 5.5850 + 0.0414cr= 1.0737 + 0.0293C. V.=19.225 +0.543n=306 Fig. 20.—Ascochyta Chrysanthemi
![. Diseases of truck crops and their control . Vegetables. Fig. 65. Tomato Diseases. a. Various forms of vegetative cells of the yeast rot fungus, 6. ascus, j. ascosporet of the yeast rot fungus (a. to c. after Schneider), d. Phoma rot on foliage, e. Phoma rot on fruit,/, pycnidium of the Phoma rot organism, g. cross-section of a pycnidium of the Phoma funpii?;. h. T^^'^elium, *. pycnospores of same (d. to »". after Jamieson).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illu Stock Photo](https://c8.alamy.com/comp/PG4CD4/diseases-of-truck-crops-and-their-control-vegetables-fig-65-tomato-diseases-a-various-forms-of-vegetative-cells-of-the-yeast-rot-fungus-6-ascus-j-ascosporet-of-the-yeast-rot-fungus-a-to-c-after-schneider-d-phoma-rot-on-foliage-e-phoma-rot-on-fruit-pycnidium-of-the-phoma-rot-organism-g-cross-section-of-a-pycnidium-of-the-phoma-funpii-h-telium-pycnospores-of-same-d-to-quot-after-jamieson-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illu-PG4CD4.jpg ". Diseases of truck crops and their control . Vegetables. Fig. 65. Tomato Diseases. a. Various forms of vegetative cells of the yeast rot fungus, 6. ascus, j. ascosporet of the yeast rot fungus (a. to c. after Schneider), d. Phoma rot on foliage, e. Phoma rot on fruit,/, pycnidium of the Phoma rot organism, g. cross-section of a pycnidium of the Phoma funpii?;. h. T^^'^elium, *. pycnospores of same (d. to »". after Jamieson).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illu Stock Photo")
RMPG4CD4–. Diseases of truck crops and their control . Vegetables. Fig. 65. Tomato Diseases. a. Various forms of vegetative cells of the yeast rot fungus, 6. ascus, j. ascosporet of the yeast rot fungus (a. to c. after Schneider), d. Phoma rot on foliage, e. Phoma rot on fruit,/, pycnidium of the Phoma rot organism, g. cross-section of a pycnidium of the Phoma funpii?;. h. T^^'^elium, *. pycnospores of same (d. to »". after Jamieson).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illu
![. ^â y-%^(^ Fig. 3. (a) Hj'phfe, (6) thin-walled " Buramer " spores, (c) thick-walled resting spore, (d) a pycnidium, (e) a perithecium, (J) ascus containing eight ascospores. resist abnormal conditions. These bodies are of two kindsâthe pycnidia and perithecia. In the former the spores are produced on small stalks which line the inside of the vessel; in the latter case a number of small sacs are produced within the vessel, each of which contains Stock Photo](https://c8.alamy.com/comp/MCK89B/y-fig-3-a-hjphfe-6-thin-walled-quot-buramer-quot-spores-c-thick-walled-resting-spore-d-a-pycnidium-e-a-perithecium-j-ascus-containing-eight-ascospores-resist-abnormal-conditions-these-bodies-are-of-two-kindsthe-pycnidia-and-perithecia-in-the-former-the-spores-are-produced-on-small-stalks-which-line-the-inside-of-the-vessel-in-the-latter-case-a-number-of-small-sacs-are-produced-within-the-vessel-each-of-which-contains-MCK89B.jpg ". ^â y-%^(^ Fig. 3. (a) Hj'phfe, (6) thin-walled " Buramer " spores, (c) thick-walled resting spore, (d) a pycnidium, (e) a perithecium, (J) ascus containing eight ascospores. resist abnormal conditions. These bodies are of two kindsâthe pycnidia and perithecia. In the former the spores are produced on small stalks which line the inside of the vessel; in the latter case a number of small sacs are produced within the vessel, each of which contains Stock Photo")
RMMCK89B–. ^â y-%^(^ Fig. 3. (a) Hj'phfe, (6) thin-walled " Buramer " spores, (c) thick-walled resting spore, (d) a pycnidium, (e) a perithecium, (J) ascus containing eight ascospores. resist abnormal conditions. These bodies are of two kindsâthe pycnidia and perithecia. In the former the spores are produced on small stalks which line the inside of the vessel; in the latter case a number of small sacs are produced within the vessel, each of which contains
![Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 30. Cabbage Diseases. a. Club root (after Cunningham), b. cell filled with spores of the club root or- ganism, c. spores and swarm spores of Plasmodiophora brassica (b. and c. after Chuff), d. black rot of cabbage (after F. C. Stewart), c. individual black rot germs of Pseudomonas campeslris, f. black-leg on young cabbage seedling, g. black-leg lesion on foot of older cabbage plant, h. black-leg lesion on cabbage leaf, i. pycnidium of Phoma oleracecE.j. pycnospores of P. olcrace Stock Photo](https://c8.alamy.com/comp/T1HN6X/diseases-of-truck-crops-and-diseases-of-truck-crops-and-their-control-diseasesoftruckc00taubuoft-year-1918-fig-30-cabbage-diseases-a-club-root-after-cunningham-b-cell-filled-with-spores-of-the-club-root-or-ganism-c-spores-and-swarm-spores-of-plasmodiophora-brassica-b-and-c-after-chuff-d-black-rot-of-cabbage-after-f-c-stewart-c-individual-black-rot-germs-of-pseudomonas-campeslris-f-black-leg-on-young-cabbage-seedling-g-black-leg-lesion-on-foot-of-older-cabbage-plant-h-black-leg-lesion-on-cabbage-leaf-i-pycnidium-of-phoma-oleracecej-pycnospores-of-p-olcrace-T1HN6X.jpg "Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 30. Cabbage Diseases. a. Club root (after Cunningham), b. cell filled with spores of the club root or- ganism, c. spores and swarm spores of Plasmodiophora brassica (b. and c. after Chuff), d. black rot of cabbage (after F. C. Stewart), c. individual black rot germs of Pseudomonas campeslris, f. black-leg on young cabbage seedling, g. black-leg lesion on foot of older cabbage plant, h. black-leg lesion on cabbage leaf, i. pycnidium of Phoma oleracecE.j. pycnospores of P. olcrace Stock Photo")
RMT1HN6X–Diseases of truck crops and Diseases of truck crops and their control diseasesoftruckc00taubuoft Year: [1918] Fig. 30. Cabbage Diseases. a. Club root (after Cunningham), b. cell filled with spores of the club root or- ganism, c. spores and swarm spores of Plasmodiophora brassica (b. and c. after Chuff), d. black rot of cabbage (after F. C. Stewart), c. individual black rot germs of Pseudomonas campeslris, f. black-leg on young cabbage seedling, g. black-leg lesion on foot of older cabbage plant, h. black-leg lesion on cabbage leaf, i. pycnidium of Phoma oleracecE.j. pycnospores of P. olcrace
RM2CDC8H2–. Annual report of the Maine Agricultural Experiment Station . Fig. 40. Pycnidium of P/ioiiia. x 180. .MP. Fig. 41. Mature pycnidium of Phoma showing thecavity filled with spores, x 160.
![. Diseases of greenhouse crops and their control . Vegetables; Plant diseases; Plant diseases. Fig. 2. â o. Effect of a balanced fertilizer on corn and clover, b. various organisms isolated from a soil particle, c. types of bacteria. Coccus, Bacillus and Spirilla I*"?''.,,?- E. Brown); d. pycnidium (after C. L. Shear), e. conidiophores of Penicillium. "^. 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.. Taubenhaus, Stock Photo](https://c8.alamy.com/comp/PG0GN7/diseases-of-greenhouse-crops-and-their-control-vegetables-plant-diseases-plant-diseases-fig-2-o-effect-of-a-balanced-fertilizer-on-corn-and-clover-b-various-organisms-isolated-from-a-soil-particle-c-types-of-bacteria-coccus-bacillus-and-spirilla-iquot-e-brown-d-pycnidium-after-c-l-shear-e-conidiophores-of-penicillium-quot-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-taubenhaus-PG0GN7.jpg ". Diseases of greenhouse crops and their control . Vegetables; Plant diseases; Plant diseases. Fig. 2. â o. Effect of a balanced fertilizer on corn and clover, b. various organisms isolated from a soil particle, c. types of bacteria. Coccus, Bacillus and Spirilla I*"?''.,,?- E. Brown); d. pycnidium (after C. L. Shear), e. conidiophores of Penicillium. "^. 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.. Taubenhaus, Stock Photo")
RMPG0GN7–. Diseases of greenhouse crops and their control . Vegetables; Plant diseases; Plant diseases. Fig. 2. â o. Effect of a balanced fertilizer on corn and clover, b. various organisms isolated from a soil particle, c. types of bacteria. Coccus, Bacillus and Spirilla I*"?''.,,?- E. Brown); d. pycnidium (after C. L. Shear), e. conidiophores of Penicillium. "^. 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.. Taubenhaus,
RMMCKWPF–. Fig. 26. Sweet Potato Diseases. a. Black rot at place of a bruise, 6. black shank, f. showing a pycnidium of the black rot fungus, d. dry rot, e. cross section through /, to show the effect of the disease on the root, f. Java black rot surface view, showing strings of spores oozing out from the center of spot, g. cross section through diseased sweet potato root to show pycnidia of the fungus Diplodia tubericola.
RM2CDCAE1–. Annual report of the Maine Agricultural Experiment Station . Fig. 39 Young developing pycnidium of Phoma from theapple shown in Fig. 24. x 180.. Fig. 40. Pycnidium of P/ioiiia. x 180. .MP
RMPG3NW4–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 360 FUNGOUS DISEASES OF PLANTS. Fig. 178. Septoria Pyricola : Section of Pycnidium nutrient media, germ tubes being pushed out from either end or from the middle (Fig. 179). This fungus has been readily cultivated upon bean stems and pear twigs, and I have reported the growth as follows: Here the fungus grew slowly at first, producing after sev- eral weeks the pyc- nidia of the Septoria. After several trans- fers this fungus grows quite luxuriantly on bean pods or stems, as seen in
RMMCKWGR–. Fig. 6i. Potato Diseases. a. Black wart (after Gussow), b. late blight on foliage, c. late blight on tuber, d. successive stages of the development of the conidia of Phyiophthora infestans (b. and d. after L. R. Jones), e. germination of conidia of Phytophlhora infestayis, bv means of zoopores (after Ward),/, mature oogonium of P. infestans (after Clinton)'. R. melters. surface view, early stage of infection, h. pycnidium of Phoma tuberose (after Melhus and Rosenbaum).
RM2CDCC04–. Annual report of the Maine Agricultural Experiment Station . Fig. 38. Plate cvilture of PlioDia iiiali 11 (Liy.s old grow-ing on prune agar.. Fig. 39 Young developing pycnidium of Phoma from theapple shown in Fig. 24. x 180.
RMPG4CEH–. Diseases of truck crops and their control . Vegetables. Fig. 6i. Potato Diseases. a. Black wart (after Gussow), b. late blight on foliage, c, late blight on tuber, d. successive stages of the development of the conidia of Phyiophthora infestans (6. and d. after L. R. Jones), e, germination of conidia of Phytophthora infestans, by means of zoopores (after Ward),/, mature oogonium of P. infestans (after Clinton), g. melters, surface view, early stage of infection, h. pycnidium of Phoma tuherosa (after Melhus and Rosenbaum).. Please note that these images are extracted from scanned page images
RMMCKWJR–. Fig. 6i. Potato Diseases. a. Black wart (after Giissow), b. late blight on foliage, c. late blight on tuber, d. successive stages of the development of the conidia of Phyiophlhora infeslans (b. and d. after L. R. Jones), e. germination of conidia of Phytophthora infestuns, by means of zoopores (after Ward),/, mature oogonium of P. infcstans (after Clinton), g. melters, surface view, early stage of infection, h. pycnidium of Phoina titberosa (after Melhus and Rosenbaum).
RM2CDCBJ2–. Fungous diseases of plants, with chapters on physiology, culture methods and technique . or stems, as seen in fig-ure . . , producing the pycnidia in a short time, and the pycnidia are then notso definite in form but formed of avery loose stromatic mass. The sub-merged hyphae are dark in color, whilethe aerial growth is dense and white,except the stromatic mass inclosingthe pycnidium. I have had culturesfor eighteen months; and althoughthey have been subjected to variousclimatic conditions, nothing of furtherinterest has as yet come from them.In nature the fungus is being closelywatched for
RMPG14ME–. Chestnut blight. Chestnut blight; Chestnut. Fig. 84.â Cross section (diagrammatic) of a mature pycnidium under the cork layer; ostiole not shown. After Heald ,««:â¢..â .â â ;:,.;.:.â ;â¢.â .â â¢â â â â. Fig. 85.â Cross section (diagrammatic) of a stroma, showing mature perithecia. After Heald. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. 1906-1960
![. Fig. 20. Beet Diseases. a. Crown gall, b. scab c. downy mildew, d. Conidiophore of Peroyiospora schachlii arising from a stomate of an infected beet leaf, e. germinating zoospore of P. schach- •/• °°?P.O'"e "f ^- schachlii, g. Cercospora leaf spot (after Halsted), h. conidiophore and conidia of Cercospora belicola (after Duggar), i. Phoma leaf spot (after Pool and McKay), k. pycnidium of Phoma belce (after T. Johnson) {d.-f. after PriUieux). Stock Photo](https://c8.alamy.com/comp/MCKWMT/fig-20-beet-diseases-a-crown-gall-b-scab-c-downy-mildew-d-conidiophore-of-peroyiospora-schachlii-arising-from-a-stomate-of-an-infected-beet-leaf-e-germinating-zoospore-of-p-schach-poquote-quotf-schachlii-g-cercospora-leaf-spot-after-halsted-h-conidiophore-and-conidia-of-cercospora-belicola-after-duggar-i-phoma-leaf-spot-after-pool-and-mckay-k-pycnidium-of-phoma-belce-after-t-johnson-d-f-after-priuieux-MCKWMT.jpg ". Fig. 20. Beet Diseases. a. Crown gall, b. scab c. downy mildew, d. Conidiophore of Peroyiospora schachlii arising from a stomate of an infected beet leaf, e. germinating zoospore of P. schach- •/• °°?P.O'"e "f ^- schachlii, g. Cercospora leaf spot (after Halsted), h. conidiophore and conidia of Cercospora belicola (after Duggar), i. Phoma leaf spot (after Pool and McKay), k. pycnidium of Phoma belce (after T. Johnson) {d.-f. after PriUieux). Stock Photo")
RMMCKWMT–. Fig. 20. Beet Diseases. a. Crown gall, b. scab c. downy mildew, d. Conidiophore of Peroyiospora schachlii arising from a stomate of an infected beet leaf, e. germinating zoospore of P. schach- •/• °°?P.O'"e "f ^- schachlii, g. Cercospora leaf spot (after Halsted), h. conidiophore and conidia of Cercospora belicola (after Duggar), i. Phoma leaf spot (after Pool and McKay), k. pycnidium of Phoma belce (after T. Johnson) {d.-f. after PriUieux).
RM2CEKRAD–. The Gardeners' chronicle : a weekly illustrated journal of horticulture and allied subjects. ■<iAr Fig. 176.—transverse section of the fruit-conceptacle (pycnidium) of the celeryblight fungus, showing the numerousthread-like spores. (greatly magnified.) rain or heavy dew the spores are carried overthe plant, and at once infect new leaves. In accounts published previously in thiscountry of the life-history, it ha6 been statedthat the disease occurs comparatively late in theseason. Thu6 Mr. Chittenden concludes his in-teresting account of Celery Leaf-spdt in theJournal of the Royal Horticul
RMPG3NTT–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. Fig. 178. Septoria Pyricola : Section of Pycnidium nutrient media, germ tubes being pushed out from either end or from the middle (Fig. 179). This fungus has been readily cultivated upon bean stems and pear twigs, and I have reported the growth as follows: Here the fungus grew slowly at first, producing after sev- eral weeks the pyc- nidia of the Septoria. After several trans- fers this fungus grows quite luxuriantly on bean pods or stems, as seen in fig- ure . . , producing the py
RMMCKWPT–. Fig. 20. Beet Diseases. a. Crown gall, b. scab, c. downy mildew, d. Conidiophore of Pernnospora schachlii arising from a stomate of an infected beet leaf, e. germinating zoospore of P. schach- lii, f. oospore of P. schachlii, g. Cercospora leaf spot (after Halsted), h. conidiophore and conidia of Cercospora belt cola (after Duggar), i. Phoma leaf spot (after Pool and McKay), k. pycnidium of Phoma beta; (after T. Johnson) (J.-/, after PriUieux).
RMRHB3A4–. Botanical gazette. Plants. BOTANICAL GAZETTE, LXVIII PLATE XXI. KEMPTON on PYCNIDIUM. 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.. Hanover, Ind. : J. M. Coulter
RMPG14JP–. Chestnut blight. Chestnut blight; Chestnut. 576 Bulletin 347 • Development of pycnidium.—The pycnidial stage usually appears on the cankers in three to six weeks after inoculation. The very earliest stages in the development of the pycnidium are not readily found and studied in the bark, but when the ftingus is grown in Van Tieghem cells in drops of agar the process can be easily observed under the microscope. At room temperature it begins in less than a week, in the following manner: At a certain point on a hypha, short cells are formed by the laying down of new septa. These cells increase
![. Fig. 104. —Spiiaerclia larktna. Section through a diseased larch needle in .June after it has lain on the ground from the previous j-ear. The mycelium is thick, thick-walled, and of a light-brown colour. The perithecia contain asci and asco- spores. To the extreme right is a pycnidium containing little oblong conidia, alongside a perithecium. x J-^". (After R. Hartig.) for distribution by means of conidia. As, however, we ascend into the mountains, the snow lies longer, so that the perithecia cannot begin to form so early, the ascospores are correspondingly late in reaching maturity, an Stock Photo](https://c8.alamy.com/comp/MCK6CD/fig-104-spiiaerclia-larktna-section-through-a-diseased-larch-needle-in-june-after-it-has-lain-on-the-ground-from-the-previous-j-ear-the-mycelium-is-thick-thick-walled-and-of-a-light-brown-colour-the-perithecia-contain-asci-and-asco-spores-to-the-extreme-right-is-a-pycnidium-containing-little-oblong-conidia-alongside-a-perithecium-x-j-quot-after-r-hartig-for-distribution-by-means-of-conidia-as-however-we-ascend-into-the-mountains-the-snow-lies-longer-so-that-the-perithecia-cannot-begin-to-form-so-early-the-ascospores-are-correspondingly-late-in-reaching-maturity-an-MCK6CD.jpg ". Fig. 104. —Spiiaerclia larktna. Section through a diseased larch needle in .June after it has lain on the ground from the previous j-ear. The mycelium is thick, thick-walled, and of a light-brown colour. The perithecia contain asci and asco- spores. To the extreme right is a pycnidium containing little oblong conidia, alongside a perithecium. x J-^". (After R. Hartig.) for distribution by means of conidia. As, however, we ascend into the mountains, the snow lies longer, so that the perithecia cannot begin to form so early, the ascospores are correspondingly late in reaching maturity, an Stock Photo")
RMMCK6CD–. Fig. 104. —Spiiaerclia larktna. Section through a diseased larch needle in .June after it has lain on the ground from the previous j-ear. The mycelium is thick, thick-walled, and of a light-brown colour. The perithecia contain asci and asco- spores. To the extreme right is a pycnidium containing little oblong conidia, alongside a perithecium. x J-^". (After R. Hartig.) for distribution by means of conidia. As, however, we ascend into the mountains, the snow lies longer, so that the perithecia cannot begin to form so early, the ascospores are correspondingly late in reaching maturity, an
RMRHB3C3–. Botanical gazette. Plants. BOTANICAL GAZETTE, LXVIII PLATE XVII. KEMPTON on PYCNIDIUM. 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.. Hanover, Ind. : J. M. Coulter
RMPG4DMH–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. 624 LABORATORY EXERCISES LESSON 22 Isolation oj a Leaf Will Fungus in Pure Culture—Givea a fungus causing leaf wilt, to obtain a pure culture by excluding the non-pathogenic forms. I. Look for the fruiting stage of the suspected fungus, or fungi. Transfer some of the spores with a sterile needle into a tube of s c.c. of sterile water. (If pycnidia or perithecia are present, transfer a whole pycnidium or perithecium into sterile water, and crush the fruit body to cause the escape of the
RMMCKCEJ–. Fig. dT.—Koitllinia radiciperda. i, ascigerous condition ; 2, peiilhccia : 3, section of same; 4, ascus containing 8 spores, also two parapliyso^; 5. tip of an ascus after treatment with iodine, showing the arrangement for effecting the opening of the ascus for escape of spores ; 6, a-cospores, one germinating; 7, brown mycelium with swellings; 8, black sclerotiiim bearing a cluster of conidial fruit ; 9, a single conidiophore; 10, conidia ; II, pycnidium ; 12, stylospores from same. (From Kew Bulletin.) Fig. i nat. size ; remainder variously mag.
RMRHB3AH–. Botanical gazette. Plants. BOTANICAL GAZETTE, LXVIII PLATE XX. KEMPTON on PYCNIDIUM. 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.. Hanover, Ind. : J. M. Coulter
RMPG4FE1–. Minnesota plant diseases. Plant diseases. Fig. 74.—More spores of rust fungi. 1. A pycnidium (from wheat rust on barberry), a capsular spore-bearing fruiting body showing dust of spores at r. 2. Spores and spore-bearing threads from 1 greatly enlarged. 3. Same spores germinating. These spores are probably the relics of male reproductive cells which have fallen into disuse. They appear to be functionless since they do not usually germinate and have never been known to cause infection. 4. A cluster-cup of an Anemone rust; s spores, formed in chains; p, threads forming the cup of the cluster-cu
![. Fio. 297.—a, Leader-shoot of Spruce, partially killed and defoliated, b, Pycnidia emerging from the rind and the leaf-scars (x o). c, Formation of oonidia inside a pycnidium (x 240). rf, Spores germinating in water. ., Spores germinating in nutritive gelatine. (After R. Hartig.) 1 Cavara (Zej7.sc/i./. Pflauzenkrankheilen, in., p. 23) regards this and S. tritici with its varieties, as forms of a single species; also Eriksson {Om Nagra sjukdomar d odlade Vdxter, 1890). -Atkinson, " Carnation Diseases," at American Carnation Society, 1893. Stock Photo](https://c8.alamy.com/comp/MCK67Y/fio-297a-leader-shoot-of-spruce-partially-killed-and-defoliated-b-pycnidia-emerging-from-the-rind-and-the-leaf-scars-x-o-c-formation-of-oonidia-inside-a-pycnidium-x-240-rf-spores-germinating-in-water-spores-germinating-in-nutritive-gelatine-after-r-hartig-1-cavara-zej7sci-pflauzenkrankheilen-in-p-23-regards-this-and-s-tritici-with-its-varieties-as-forms-of-a-single-species-also-eriksson-om-nagra-sjukdomar-d-odlade-vdxter-1890-atkinson-quot-carnation-diseasesquot-at-american-carnation-society-1893-MCK67Y.jpg ". Fio. 297.—a, Leader-shoot of Spruce, partially killed and defoliated, b, Pycnidia emerging from the rind and the leaf-scars (x o). c, Formation of oonidia inside a pycnidium (x 240). rf, Spores germinating in water. ., Spores germinating in nutritive gelatine. (After R. Hartig.) 1 Cavara (Zej7.sc/i./. Pflauzenkrankheilen, in., p. 23) regards this and S. tritici with its varieties, as forms of a single species; also Eriksson {Om Nagra sjukdomar d odlade Vdxter, 1890). -Atkinson, " Carnation Diseases," at American Carnation Society, 1893. Stock Photo")
RMMCK67Y–. Fio. 297.—a, Leader-shoot of Spruce, partially killed and defoliated, b, Pycnidia emerging from the rind and the leaf-scars (x o). c, Formation of oonidia inside a pycnidium (x 240). rf, Spores germinating in water. ., Spores germinating in nutritive gelatine. (After R. Hartig.) 1 Cavara (Zej7.sc/i./. Pflauzenkrankheilen, in., p. 23) regards this and S. tritici with its varieties, as forms of a single species; also Eriksson {Om Nagra sjukdomar d odlade Vdxter, 1890). -Atkinson, " Carnation Diseases," at American Carnation Society, 1893.
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