RF2B0588P–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMMCKB1T–. Fig. 64. — Currant leaf spot (septoriose). After Stewart and Eustace. Septoriose ] [ (Septoria Rihis Desm.) The leaf spots j Cercosporose J [ (Cercospora angulata Wint.) The " currant leaf spot" is a term applied to a peculiar spotting of the leaves of both currants and gooseberries. It is likely to occur wherever these plants are grown. The spot is of rather characteristic appearance, usually circular,
RMRCCKGM–. Diseases of truck crops and their control. Vegetables. 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).. Please note that these images are extracted from scanned page images that may have been digit
RFPJDBM7–Disease of flower hydrangea hortensia due to lack of water and pollution. Armillaria mellea, chlorosis virus parasite ascale insects mite acarid
RFRK2XR8–Banana Black Sigatoka Leaf Symptoms
RF2AXT543–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMMCKCAP–. Fig. 135 Cercospora Kopkei From Wakker 6- Went not dry out, which serves to distinguish this affection from eye- spot or ring-spot; from yellow-spot it differs in the narrowness of the margin. Yellow Leaf-Spot. The yellow leaf-spot, which is very generally distributed in Java without being the cause of notable damage, was recognised by Went in Barbados, Trinidad and Demerara. It is caused by Cercospora Kopkei Krug.
RMRCCKEJ–. Diseases of truck crops and their control. Plants -- Diseases. 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).. Please note that these images are extracted from scanned page images that may
RFPJE1E8–Disease of flower hydrangea hortensia due to lack of water and pollution. Armillaria mellea, chlorosis virus parasite ascale insects mite acarid
RFRK2WX0–Banana Black Sigatoka Leaf Symptoms
RF2B1GFFG–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMMCKB1P–. Fig. 56. — Currant leaf-spot. After Stewart and Eustace. which bear numerous, minute, black pycnidia. Heavy infection causes defoliation. Both currants and gooseberries are affected. Treatment is as for the following disease. Angular leaf-spot ^^° {Cercospora angulata Wint.). — This term is applied to a pecuHar spotting of the leaves of both currants and gooseberries. It is likely to occur wherever these plants are grown. The spot is of rather characteristic appearance, irregular or angular in outline, generally about 3 mm. in diameter. In the center of the brown or gray, dis-
RMRCCK99–. Diseases of truck crops and their control. Plants -- Diseases. Fig. 70. Celery Diseases. a. Cercospora leaf spot, h. conidiophores and conidia of Cercospo (afterDuggar and Baily), c. Rhizoctonia root rot.. 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, Jacob Joseph. New York, Dutton
RFPJE0WK–Disease of flower hydrangea hortensia due to lack of water and pollution. Armillaria mellea, chlorosis virus parasite ascale insects mite acarid
RFPJ9CFY–Disease of flower hydrangea hortensia due to lack of water and pollution. Armillaria mellea, chlorosis virus parasite ascale insects mite acarid
RFRK2W99–Banana Black Sigatoka Leaf Symptoms
RF2B19AMN–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMMCKAB0–. Fig, 56. — Currant leaf-spot. After Stewart and Eustace. which bear numerous, minute, black pycnidia. Heavy infection causes defoliation. Both currants and gooseberries are affected. Treatment is as for the following disease. Angular leaf-spot ^^^ {Cercospora angulata Wint.).—This term is applied to a peculiar spotting of the leaves of both currants and gooseberries. It is likely to occur wherever these plants are grown. The spot is of rather characteristic appearance, irregular or angular in outline, generally about 3 mm. in diameter. In the center of the brown or gray, dis-
RMRCCKAY–. Diseases of truck crops and their control. Vegetables. Fig. 70. Celery Diseases. a. Cercospora leaf spot, b. conidiophores and conidia of Cercospora apii (afterDuggar and Baily), c. Rhizoctonia root rot.. 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, J. J. (Jacob Joseph), 1885-. New York, E. P. Dutton & company
RFPJ9E31–Disease of flower hydrangea hortensia due to lack of water and pollution. Armillaria mellea, chlorosis virus parasite ascale insects mite acarid
RFPJ9EWN–Disease of flower hydrangea hortensia due to lack of water and pollution. Armillaria mellea, chlorosis virus parasite ascale insects mite acarid
RFRK2X3R–Banana Black Sigatoka Leaf Symptoms
RF2B23D3X–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMMCKA4C–. Fig. 93. — Lima bean pods showing Pho- mose. After Halsted. Leaf spot (Cercospora beticola Sacc). — This, one of the several leaf spots upon the beet, is very widespread in the eastern and middle states. Very few fields are entirely free from it. It occurs upon all varieties, but is especially injurious to the sugar beet. The round, brownish, purple-bordered spots turn ashen in the center, and when mature, often become so thin and brittle as to drop out, leaving ragged holes. The sporif-
RMRCCKAE–. Diseases of truck crops and their control. Plants -- Diseases. 4tf^ mi m ^[?^ -' %"%. Fig. 55. Diseases of the Okra. a. Okra field badly affected with the Texas Root rot, to the front two resistant hills, b. root knot, c. Cercospora leaf spot.. 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, Jacob Joseph. New York, Dutton
RFPJ9F88–Disease of flower hydrangea hortensia due to lack of water and pollution. Armillaria mellea, chlorosis virus parasite ascale insects mite acarid
RFJCMEM2–Disease of hydrangea due to frozen winter close up
RFRK2W7W–Banana Black Sigatoka Leaf Symptoms
RF2AYWFJH–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRCDK3E–. Diseases of greenhouse crops and their control. Vegetables; Plant diseases. Fig. i6. Beet Diseases. a. Nematode or root knot, h. Crown gall, c. Cercospora leaf spot (after Halsted), d. spores of Cercospora beticola (after Schwarze).. 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, J. J. (Jacob Joseph), 1885-. New York, E. P. Dutton & company
RFJCHCBY–Disease of hydrangea due to frozen winter close up
RF2B23CP9–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRCCKGH–. Diseases of truck crops and their control. Vegetables. Fig. 23. Lettuce Diseases. a. Germinating sclerotium of Sclerolinia lihertiana the cause of lettuce drop, b. section of fruiting cup (apothecium) showing asci, ascospores and paraphyses of S. liberliana, c. section through sclerotium of .S. lihertiana, d. germinating ascospore of S. lihertiana (a. to d. after F. S. Stevens), e. Cercospora leaf spot.. 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 perfectl
RFJCMEMG–Disease of hydrangea due to frozen winter close up
RF2AY6M43–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRCCKEA–. Diseases of truck crops and their control. Plants -- Diseases. Fig. 23. LETTL'cii Diseases. a Germinating sclerotium of Silerolinia liherliana the cause of lettuce drop, b. section of fruiting cup (apothecium) showing asci, ascospores and paraphyses of .S'. Uberliana, c. section through sclerotium of 6. librrHanii. d. germinating ascospore of .S'. liherliana (a. to d. after F. S. Stevens), e. Cercospora leaf spot.. 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 n
RFJCHBPF–Disease of hydrangea due to frozen winter close up
RF2ATJ8NY–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRCCKD8–. Diseases of truck crops and their control. Vegetables. W^^9U^^ 'i. :i«<!: ^' â ?^. Fig. 55. Diseases of the Okra. a. Okra field badly affected with the Texas Root rot, to the front two resistant hills, b. root knot, c. Cercospora leaf spot.. 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, J. J. (Jacob Joseph), 1885-. New York, E. P. Dutton & company
RFJCHBE8–Disease of hydrangea due to frozen winter close up
RF2B254WW–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRGW519–. Bulletin. 1901-13. Agriculture; Agriculture. Fig. 1.—Leaf of Winged Elm Affected with Scab Due to Gnomonia Ulmea. Fig. 2.—Leaf of Red Mulberry, Showing Eye-Spot Due to Cercospora Moricola. Fig. 3.—Leaf of Live Oak, Showing Tar-Spot Due to Rhytisma Erythrosporum. Fig. 4.—Leaflets of Black Locust, Showing the Characteristic Spotting Due to Cylindrosporium Solitarium.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United S
RFJCME3R–Disease of hydrangea due to frozen winter close up
RF2AT9950–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRH15CT–. Bulletin. Agriculture. Fig. 1.—Leaf of Winged Elm Affected with Scab Due to Gnomonia Ulmea. Fig. 2.—Leaf of Red Mulberry, Showing Eye-Spot Due to Cercospora Moricola. Fig. 3.—Leaf of Live Oak, Showing Tar-Spot Due to Rhytisma Erythrosporum. Fig. 4.—Leaflets of Black Locust, Showing the Characteristic Spotting Due to Cylindrosporium Solitarium.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States. Bureau of Plant
RFJCHBDA–Disease of hydrangea due to frozen winter close up
RF2AX06N1–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RM2AXJWH3–Fungi and fungicides; a practical manual, concerning the fungous diseases of cultivated plants and the means of preventing their ravages . an extendedaccount of grape anthracnose. Since then it has beenfrequently treated of in The Journal of Mycology, andin experiment station bulletins and reports. FUNGI AFFECTING THE CURRANT AND GOOSEBERRY The Leaf=spot Disease Septoria ribis and Cercospora angulata The foliage of currants and gooseberries is oftenattacked early in summer by two or more species offungi, which produce small brownish spots, at first oftenno larger than a pin head, but gradually
RFJCHBN3–Disease of hydrangea due to frozen winter close up
RF2B0BEYH–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RM2ANAH5Y–A text-book of mycology and plant pathology . Fig., 108.—Sweet-potato stem rot{Fusarium balatatis). Section throughsweet potato showing blackened ring justbelow surface caused by the stem-rot fun-gus. {After Barter, L. L., U. S. FarmersBull. 714. March ii, 1916.) FUNGI IMPERFECTl (dEUTEROMYCETES) >67 fungus which causes leaf spot of beets, Cercospora beticola. The formgenus Fusarium (Fig. log), established by Link in 1809, is one whichhas come into prominence recently as associated with the productionof serious plant diseases. At least eleven species are found on thesweet potato (Fig. 108),
RFJCHBFX–Disease of hydrangea due to frozen winter close up
RF2AWGJTX–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRJBG6R–. Celery for profit. Celery. [from old catalog]. 66 CELERY FOR PROFIT, B. & C.) is also probably quite common, and maybe easily confounded with the other. The appearance of a blighted leaflet is shown at b, same figure. It differs from other celery blights, to the ordinary observer, in the more com- plete killing of the leaf affected. Fig. 33.. Fungous Diseases of Celery. a, Leaf Blight (Cercospora Apii, Fr.) ; h. Leaf Blight {Septoria Petroselini, Des., var. Apii, B. & C.) ; c. Leaf Spot {Phyllosticia Apii, Hals.); ^, Rust {Puc- cinia bullata, Wint.); e, Bacteria on Leaf; /", Cor
RF2ATTCYP–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRH116P–. Bulletin. Agriculture -- Ontario. 14 recommended to use the Ammonicial-copper carbonate solution in the latei sprayings. Leaf Spot (Septoria petroselini, var apii): Brown spots, studded with minute black spots, appear on the leaves.. Celery Blight. (Cercospora />ii.)—A, spores through the agency of which the disease spreads ; B, tuft of aerial protruding through a breathing-pore of a leaf ; C, a diseased leaf, showing the brown. Remedies : Same as for leaf blight above. i i Corn. (Insects). Corn-Stalk Borer (Papaipema nitela) : The larvae which belong to the Cutworms bore into the stalks
RF2AWA1K0–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRH159J–. Bulletin. Agriculture. Bui. 226, Bureau of Plir' Ir.Hw-.'-v U S P-p' "' &.r.r..tu Plate XV.. Fig. 1.—Leaf of the Japanese Privet Affected with Leaf-Spot Due to Cercospora Ligustri.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States. Bureau of Plant Industry. Washington : G. P. O.
RF2B1409H–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRGW4YA–. Bulletin. 1901-13. Agriculture; Agriculture. Fig. 1.—Leaf of the Japanese Privet Affected with Leaf-Spot Due to Cercospora Ligustri.. Fig. 2.—Small Branch of Mesquite, Showing Three Galls of Possible Bacterial Origin.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States. Bureau of Plant Industry, Soils, and Agricultural Engineering. Washington Govt. Print. Off
RF2AYK6G0–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRGW4YM–. Bulletin. 1901-13. Agriculture; Agriculture. Bui. 226, Bureau of Plant Industry, U. S. Dept. of Agriculture. Plate XV.. Fig. 1.—Leaf of the Japanese Privet Affected with Leaf-Spot Due to Cercospora Ligustri.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States. Bureau of Plant Industry, Soils, and Agricultural Engineering. Washington Govt. Print. Off
RF2B0WD97–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMREERF9–. Comparative morphology of Fungi. Fungi. SPHAERIALES 269 and germinate in spring, producing conidia of Ramularia Hieracii (Klebahn, 1918). Of Cercosphaerella, M. millegrana on leaves of Tilia cordata, forms conidia of Cercospora microsora and, further, the imperfect form of M. cerasella, a leaf spot of cherry, is Cercospora cerasella (Aderhold, 1900). As has been indicated, the extent of the imperfect forms of Myco- sphaerella is by no means exhausted in the three sections above; e.g., of the forms important in phytopathology, M. pinodes, causing a spot of pods of beans and peas, has Ascochyt
RF2ATD13M–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRDE35G–. Diseases of economic plants . Plant diseases. 242 DISEASES OF ECONOMIC PLANTS ent upon horse-radish, but does not usually become serious. Leaf spot, cercosporose {Cercospora Armoracioe Sacc).— This spot is much like that of ramulariose. LETTUCE Sclerotiniose, drop, wilt (Sclerotinia Libertiana Fckl.).— The disease begins with wilting of the outer lower leaves,. Fig. 110. — Sclerotia of Sclerotinia from lettuce germinating. which droop and fall flat upon the ground; a similar fate rapidly overtakes the inner leaves, and so on over the whole plant, until within a few days the entire plant is d
RF2AW1WJ6–Close-up green leaf of sweet cherry with damage by ulcers of diseases and fungi of brown spotting of scab monniliosis. Gardening problems. Fungal and viral diseases of plants.
RMRH1590–. Bulletin. Agriculture. Fig. 1.—Leaf of the Japanese Privet Affected with Leaf-Spot Due to Cercospora Ligustri.. -'^^^x'-;' Fig. 2.—Small Branch of Mesquite, Showing Three Galls of Possible Bacterial Origin. J|^ 1^ ^ > '*.* ,»!'!'• 4jBj^7^t. *• ^I^^Kiit!^ i^' ^ ., "^A-A-i .f • " ' ^S' i ^ ^^ ^i P p»^- Fig. 3.—a Single Large Gall on a Small Branch of Mesquite.. 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.. Un
RMRDJ6DF–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 312 FUNGOUS DISEASES OF PLANTS XVIII. EARLY BLIGHT OF CELERY Cercospora Apii Fr. Atkinson, Geo. F. Note on the Cercospora of Celery Blight. Cornell Agl. Exp. Sta. Built. 48: 314-316. fig. j. 1892. Duggar, B. M. Early Blight of Celery. Cornell Agl. Exp. Sta. Built. 132: 201-206. figs. 48-50. 1S97. Sturgis, W. C. On the Prevention of Leaf-Blight and Leaf-Spot of Celery. Conn. Agl. Exp. Sta. Rept. 21: 167-171. 1897. U. S. Dept. Agl. Rept. (1886): 117-120. Habitat relations. Cercospora
RMRDE3EY–. Diseases of economic plants . Plant diseases. 152 DISEASES OF ECONOMIC PLANTS toms to the knot, may be distinguished from it by the absence of wartlike growths upon the surface of affected twigs. As an effective measure all diseased canes may be cut out and burned, cutting well below the diseased area.. FlQ. 64. — Currant leaf spot (septoriose). After Stewart and Eustace. Septoriose 1 [ (Septoria Ribis Desm.) The leaf spots Cercosporose J [ {Cercospora angulata Wint.) The " currant leaf spot" is a term applied to a peculiar spotting of the leaves of both currants and gooseberries.
RMRDFE4P–. Manual of tree diseases . Trees. 102 MANUAL OF TREE DISEASES Leaf-Spot Caused by Cercospora tilim Peck The leaves of the basswood are often affected by this disease. Large brown dead areas are formed at the tip or along the mar- gin of the leaf (Fig. 10). A broad yellowish border surromids. Fig. 10. — Leaf-spot of basswood. the spot. The fruiting bodies of the causal pathogene are in- conspicuous. For the general life history and colitrol of leaf- spot fungi, see page 33.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readabili
RMRDJ6EB–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. FUNGI IMPERFECT! 309 XVII. LEAF SPOT OF BEETS Cercospora Beticola Sacc. Duggar, B. M. Leaf Spot of the Beet. Cornell Agl. Exp. Sta. Built. 163: 352-359- figs. 56-61. 1898. Pammel, L. H. Spot Disease of Beets. Iowa Agl. Exp. Sta. Built. 15: 238- 243. 1891. Habitat relations. The beet leaf spot is widely distributed. Both in Europe and America it is a fungus of common occurrence, and it is believed to be more or less prevalent wherever beets are grown even to a limited extent. The re
RMRCD95R–. Diseases of crop-plants in the Lesser Antilles. Tropical plants; Plant diseases. DISEASES OFl^BANANA 251 of these diseases as it is quite probable that they will be met with sooner or later. Black Spot of Leaves. This leaf disease has been reported from several localities in Jamaica, where it is confined to good soils containing a high proportion of marl. It begins with tiny black spots on the main veins of the leaf-blade, which increase in size and become. Fig. 96 Cercospora Musarum Bull. 6, Dept. Agri., Jamaica lenticular and are then often surrounded by a narrow bright yellow border. As t
RMRCDR3E–. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. CERCOSPORA 487 proved by inoculation experiments that when the spores are placed on a young celery leaf, a disease spot becomes evident about the fourth day, and that mature spores are produced in four weeks. The pale olive sporophores originate from colourless mycelium in the tissue of the leaf, and come to the surface of the leaf in clusters through the stomata of the leaf. Spores. Fig. 147.—Cercospora apii. i, celery leaf attacked by the fungus ; 2, f
RMRH15JH–. Bulletin. Agriculture. .p-( ^ ^ '-^, "> ^^ ^y%«>^ Fig. 1.—Roots of Tomato Plant Deformed by Nematodes. Fig. 2.—Root-Knot of Muskmelon Due to Nematodes. Fig. 3.—Leaves of Lima Bean, Showing Leaf-Spot Due to Cercospora Canescens.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States. Bureau of Plant Industry. Washington : G. P. O.
RMRDE23A–. A text-book of mycology and plant pathology . Plant diseases; Fungi in agriculture; Plant diseases; Fungi. FUNGI IMPERFECTI (dEUTEROMYCETES) 267 fungus which causes leaf spot of beets, Cercospora beticola. The form genus Fusarium (Fig. 109), established by Link in 1809, is one which has come into prominence recently as associated with the production of serious plant diseases. At least eleven species are found on the sweet potato (Fig. 108), and these have been investigated by H. W. WoUenweber' and other mycologists. He finds that the genus has a number of vegetative and spore stages the vari
RMRM74MB–. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Diseases of the Sugar Beet. 355 b. Characters of the Fu7igus. The leaf spot of beets is caused by the fungus Cercospora beti- cola Sacc. When the spots on diseased leaves begin to look somewhat grayish in appearance, the reproductive or propa- gative parts of the fungus will be found abundantly. The upright blackened leaves often show this ashen appearance over the entire surface. Examining under the microscope a little of this material scraped off with
RMRDE36A–. Diseases of economic plants . Plant diseases. 226 DISEASES OF ECONOMIC PLANTS CELERY Leaf spot, early blight, cercosporose {Cercospora Apii Ft.). — The leaf spot is common in both Europe and America, constituting probably the most destructive disease to which the celery plant is subject. It is known from. Fig. 106. —• Cauliflower affected with black rot, (Pseudomonose). Original. Colorado to New Jersey. In Florida in 1906 it is said to have injured 80 per cent of the crop. The crop is largely reduced, and the unsightUness of the spots injures the salability of the product. The spots appear f
RMRDJ6BK–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. FUNGI IMPERFECTI 315 Padi, but it is important as an almond tree diseasel in California and elsewhere. Cercospora Nicotianae E. & E. The more commonly observed leaf spot or frog eye of the tobacco has been reported from many tobacco-growing regions, but does not appear to be a disease of. 6 Fig. 148. Cercospora circumscissa. (After Pierce) a, tuberculate stroma; &, conidiophores and conidia any great importance, and doubtless many different fungi are con- cerned in the prod
RMRGW553–. Bulletin. 1901-13. Agriculture; Agriculture. i % ° $! fc !5JJ 2. Fig. 1.—Roots of Tomato Plant Deformed by Nematodes. Fig. 2.—Root-Knot of Muskmelon Due to Nematodes. Fig. 3.—Leaves of Lima Bean, Showing Leaf-Spot Due to Cercospora Canescens.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. United States. Bureau of Plant Industry, Soils, and Agricultural Engineering. Washington Govt. Print. Off
RMRG347A–. California plant diseases. Plant diseases. Bulletin 21S] CALIFORNIA PLANT DISEASES. 1103. Fig. 32.—Leaf spot on beet {Cercospora beticola). Leaf Spot (Cercospora beticola). Figure 32. Produces small dead spots all over the leaves. Quite common in California, but practically unknown on sugar beets. Downy Mildew {Peronospora schachtii). Figure 33. Causes a stunting of the inner leaves and a checking of the growth of the plant. The fungus is visible to the eye as a mildew on the under. Please note that these images are extracted from scanned page images that may have been digitally enhanced for
RMRCC6G7–. Diseases of economic plants. Plant diseases. 242 DISEASES OF ECONOMIC PLANTS ent upon horse-radish, but does not usually become serious. Leaf spot, cercosporose (Cercospora Artnoracioe Sacc).— This spot is much like that of ramulariose. LETTUCE Sclerotiniose, drop, wilt (Sclerotinia Libertiana Fckl.).— The disease begins with wilting of the outer lower leaves,. Fig. 110. — Sclerotia of Sclerotinia from lettuce germinating. which droop and fall flat upon the ground; a similar fate rapidly overtakes the inner leaves, and so on over the whole plant, until within a few days the entire plant is d
RMRCDPH5–. Diseases of economic plants. Plant diseases. 242 DISEASES OF ECONOMIC PLANTS ent upon horse-radish, but does not usually become serious. Leaf spot, cercosporose (Cercospora Armoracice Sacc).— This spot is much like that of ramulariose. LETTUCE Sclerotiniose, drop, wilt (Sclerotinia Libertiana Fckl.).— The disease begins with wilting of the outer lower leaves,. Fig. 110, — Sclerotia of Sclerotinia from lettuce germinating. which droop and fall flat upon the ground; a similar fate rapidly overtakes the inner leaves, and so on over the whole plant, until within a few days the entire plant is de
RMRCDPB5–. Diseases of economic plants. Plant diseases. Trees and Timber 391 LINDEN Leaf-Spot (Cercospora microsora Sacc). — Small, circular or large, irregular, dead spots of the leaf indicate the presence of this disease. It has been reported as destructive in Mas-. FiG. 207. — Mistletoe. After U. S. Bur. PL Ind. sachusetts, New Jersey, and New York. Two sprayings in Massachusetts resulted in longer retention of the foliage and lessened infection. LOCUST Yellow wood-rot ^^"^ {Fomes rimosus Berk.).—From Massachusetts to New Mexico, over the entire black locust territory, this heart-rot prevails.
RMRCC68Y–. Diseases of economic plants. Plant diseases. Trees and Timber 391 LINDEN Leaf-spot (Cercospora microsora Sacc).—Small, circular or large, irregular, dead spots of the leaf indicate the presence of this disease. It has been reported as destructive in Mas-. FiG. 207. — Mistletoe. After U. S. Bur. PI. Ind. sachusetts. New Jersey, and New York. Two sprayings in Massachusetts resulted in longer retention of the foliage and lessened infection. LOCUST Yellow wood-rot "^^^ (Fomes rimosus Berk.). — From Massachusetts to New Mexico, over the entire black locust territory, this heart-rot prevails.
RMRCDPNE–. Diseases of economic plants. Plant diseases. 152 DISEASES OF ECONOMIC PLANTS toms to the knot, may be distinguished from it by the absence of wartlike growths upon the surface of affected twigs. As an effective measure all diseased canes may be cut out and burned, cutting well below the diseased area.. Fig. 64. — Currant leaf spot (septoriose). After Stewart and Eustace. Septoriose Cercosporose The leaf spots (Septoria Ribis Desm.) (Cercospora angulata Wint.) The " currant leaf spot" is a term applied to a peculiar spotting of the leaves of both currants and gooseberries. It is lik
RMRCC6KH–. Diseases of economic plants. Plant diseases. 152 DISEASES OF ECONOMIC PLANTS toms to the knot, may be distinguished from it by the absence of warthke growths upon the surface of affected 'twigs. As an effective measure all diseased canes may be cut out and burned, cutting well below the diseased area.. Fig. 64. — Currant leaf spot (septoriose). After Stewart and Eustace. Septoriose ] [ (Septoria Rihis Desm.) The leaf spots j Cercosporose J [ (Cercospora angulata Wint.) The " currant leaf spot" is a term applied to a peculiar spotting of the leaves of both currants and gooseberrie
RMRCDPJP–. Diseases of economic plants. Plant diseases. 214 Diseases of Economic Plants PEANUT Leaf-spot (Cercospora personata (B. & C.) Ell.).—This leaf-spot is circular in outline, indefinitely bordered, black to brown in the center and grading to green on its outer edge. The lower leaves are first affected and suffer most; later the disease spreads to the upper leaves. The leaves. Fig. 116. — Peanut leaf-spot. After Wolf. begin to fall soon after they spot, and in many cases the death of the plant results. It is often a pest. The causal fungus was first collected in Carolina and Alabama by Raven
RMRCDPHG–. Diseases of economic plants. Plant diseases. 226 DISEASES OF ECONOMIC PLANTS CELERY Leaf spot, early blight, cercosporose (Cercospora Apii Ft.). — The leaf spot is common in both Europe and America, constituting probably the most destructive disease to which the celery plant is subject. It is known from. Fig. 106. — Cauliflower affected with black rot. (Pseudomonose). Original. Colorado to New Jersey. In Florida in 1906 it is said to have injured 80 per cent of the crop. The crop is largely reduced, and the unsightliness of the spots injures the salability of the product. The spots appear fi
RMRCDPJH–. Diseases of economic plants. Plant diseases. Fig. 93. — Lima bean pods showing Pho- mose. After Halsted. Leaf spot (Cercospora beticola Sacc). — This, one of the several leaf spots upon the beet, is very widespread in the eastern and middle states. Very few fields are entirely free from it. It occurs upon all varieties, but is especially injurious to the sugar beet. The round, brownish, purple-bordered spots turn ashen in the center, and when mature, often become so thin and brittle as to drop out, leaving ragged holes. The sporif-. Please note that these images are extracted from scanned pa
RMRCDP4J–. Diseases of forest and shade trees, ornamental and miscellaneous plants in the United States in 1921. Trees Diseases and pests United States; Plants, Ornamental Diseases and pests United States. 457 LIIIDEK (Tilia spp .) Leaf spot caused by Cercospora microsora Sacc. Indiana - local, very slight damage. (HET) Po.vdery nilde^v caused by Unc inula clintoiui Pk. Ohio - rarely seen, previously refjorted from two localities in Ohio on Tilia americana to vhich It may bt confined in Arr.erica. (UF). Fig. 93- Distribution of Guif^nardia acsculi (rk,) Stewart on horse chestnut in the U. S-, according
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