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Leaf spot fungus Stock Photos and Images
RF2DM2PD8–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
RMRCDB4K–. Diseases and decays of Connecticut tobacco. Tobacco. Figure 2. Some fungi that cause tobacco diseeises, all greatly magnified. A-E, the mildew fungus Peronospora tahacina. A, Sporophore with developing summer spores at tips. B, Mature summer spores. C, Germination of the summer spores. D, Cross- section of a winter spore. E, Haustorium inside a leaf cell and a segment of mycelium between the leaf cells. F, Spores of the fungus Aliernaria tenuis, causing brown-spot and freckle rot. G, Mycelium of the same fungus. H, Sporophore and heads of the spores of one of the pole rot fungi, Botrytis cin
RF2R8R6YW–The Rose Rust Fungus caused by a fungus Phragmidium mucronatum and P. tuberculatum. Symptoms on ornamental roses in the garden.
RF2DM1KB2–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
RMRCCK55–. Diseases of wheat, oats, barley, and rye. Grain. BOEWE: DISEASES OF WHEAT, OATS, BARLEY, AND RYE 115 bleached-straw color bordered by dark brown. Sometimes the spots have a zonate appearance. On the tips of glumes, incon- spicuous, medium brown scald spots sometimes occur. Such spots. Fig. 41.—Scald on barley. The fungus produces spots on leaf blades, sheaths, and glumes. Dead areas are longer than wide; the center of each spot is light gray, which is bordered by dark brown.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readab
RF2R8R6XD–The Rose Rust Fungus caused by a fungus Phragmidium mucronatum and P. tuberculatum. Symptoms on ornamental roses in the garden.
RF2DM19N1–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
RMRCCK6W–. Diseases of wheat, oats, barley, and rye. Grain. BOEWE: DISEASES OF WHEAT, OATS, BARLEY, AND RYE 25 formed. In the spring the spots gradually elongate as the fungus grows in the leaf tissue; they turn reddish brown and, as a rule, become partially surrounded by a yellowish band. The oldest part of each spot usually turns to light brown or ashen white and is studded with tiny, black specks. Many heavily infected leaves have a yellowish cast and they may die pre- maturely. The lower leaves are usually the most severely diseased. Sometimes a spot extends entirely across a leaf,. Kig. 6.—Speckle
RF2R8R6H0–The Rose Rust Fungus caused by a fungus Phragmidium mucronatum and P. tuberculatum. Symptoms on ornamental roses in the garden.
RF2DM3FPC–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
![. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. I90 DISEASES OF CULTIVATED PLANTS the form of miniature pins with pale yellowish heads, and 1-2 mm. high. During January 190S a large consignment of diseased berries was received at Kew from Costa Rica. The berries. ^'^'^ fl,. fJ â Jf f^T .7'" VG.z,o.âSpliacros(ilbeflavid<i. i, leaf showing disease ; 2, section showing conidia form ; 3, surface view of white spot bear- ing conidial stage of fungus; 4, section showing perithecia ; 5, two perithec Stock Photo](https://c8.alamy.com/comp/RCD975/diseases-of-cultivated-plants-and-trees-plant-diseases-plants-wounds-and-injuries-plants-protection-of-trees-diseases-and-pests-i90-diseases-of-cultivated-plants-the-form-of-miniature-pins-with-pale-yellowish-heads-and-1-2-mm-high-during-january-190s-a-large-consignment-of-diseased-berries-was-received-at-kew-from-costa-rica-the-berries-fl-fj-jf-ft-7quot-vgzospliacrosilbeflavidlti-i-leaf-showing-disease-2-section-showing-conidia-form-3-surface-view-of-white-spot-bear-ing-conidial-stage-of-fungus-4-section-showing-perithecia-5-two-perithec-RCD975.jpg ". Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. I90 DISEASES OF CULTIVATED PLANTS the form of miniature pins with pale yellowish heads, and 1-2 mm. high. During January 190S a large consignment of diseased berries was received at Kew from Costa Rica. The berries. ^'^'^ fl,. fJ â Jf f^T .7'" VG.z,o.âSpliacros(ilbeflavid<i. i, leaf showing disease ; 2, section showing conidia form ; 3, surface view of white spot bear- ing conidial stage of fungus; 4, section showing perithecia ; 5, two perithec Stock Photo")
RMRCD975–. Diseases of cultivated plants and trees. Plant diseases; Plants -- Wounds and injuries; Plants, Protection of; Trees -- Diseases and pests. I90 DISEASES OF CULTIVATED PLANTS the form of miniature pins with pale yellowish heads, and 1-2 mm. high. During January 190S a large consignment of diseased berries was received at Kew from Costa Rica. The berries. ^'^'^ fl,. fJ â Jf f^T .7'" VG.z,o.âSpliacros(ilbeflavid<i. i, leaf showing disease ; 2, section showing conidia form ; 3, surface view of white spot bear- ing conidial stage of fungus; 4, section showing perithecia ; 5, two perithec
RF2R8R70X–The Rose Rust Fungus caused by a fungus Phragmidium mucronatum and P. tuberculatum. Symptoms on ornamental roses in the garden.
RF2DM2MAE–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
![. Diseases of economic plants . Plant diseases. FORAGE CEOPS 393 ease may be clearly distinguished by cutting across the stem and observing whether the color of the wood is normal. This discoloration, which may often be seen through the translucent stem of the cowpea, is characteristic of this class of diseases. The name " wilt" is somewhat mislead-. FiG, 170. — Cowpea leaf spot (amerosporiose). Original. ing, as the leaves usually drop off before there is any con- spicuous wilting. The causal fungus is carried by the plow and cultivator, as evidenced by the spread of the disease len Stock Photo](https://c8.alamy.com/comp/RDE2PH/diseases-of-economic-plants-plant-diseases-forage-ceops-393-ease-may-be-clearly-distinguished-by-cutting-across-the-stem-and-observing-whether-the-color-of-the-wood-is-normal-this-discoloration-which-may-often-be-seen-through-the-translucent-stem-of-the-cowpea-is-characteristic-of-this-class-of-diseases-the-name-quot-wiltquot-is-somewhat-mislead-fig-170-cowpea-leaf-spot-amerosporiose-original-ing-as-the-leaves-usually-drop-off-before-there-is-any-con-spicuous-wilting-the-causal-fungus-is-carried-by-the-plow-and-cultivator-as-evidenced-by-the-spread-of-the-disease-len-RDE2PH.jpg ". Diseases of economic plants . Plant diseases. FORAGE CEOPS 393 ease may be clearly distinguished by cutting across the stem and observing whether the color of the wood is normal. This discoloration, which may often be seen through the translucent stem of the cowpea, is characteristic of this class of diseases. The name " wilt" is somewhat mislead-. FiG, 170. — Cowpea leaf spot (amerosporiose). Original. ing, as the leaves usually drop off before there is any con- spicuous wilting. The causal fungus is carried by the plow and cultivator, as evidenced by the spread of the disease len Stock Photo")
RMRDE2PH–. Diseases of economic plants . Plant diseases. FORAGE CEOPS 393 ease may be clearly distinguished by cutting across the stem and observing whether the color of the wood is normal. This discoloration, which may often be seen through the translucent stem of the cowpea, is characteristic of this class of diseases. The name " wilt" is somewhat mislead-. FiG, 170. — Cowpea leaf spot (amerosporiose). Original. ing, as the leaves usually drop off before there is any con- spicuous wilting. The causal fungus is carried by the plow and cultivator, as evidenced by the spread of the disease len
RF2RD8HJH–Cucumber leaves affected by downy mildew close-up. Cucumber disease Peronosporosis or False powdery mildew. Leaf with yellow spots.
RF2DM1979–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
RMRDJ67B–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. FUNGI IMPERFECTI 347 Phyllosticta maculicola Hals.1 is the cause of a very common leaf spot of several species of Dracaena and Cordyline. The spots are characterized by pale centers an'd reddish or purplish borders. The disease is sometimes severe in greenhouses where it has long been allowed to proceed unchecked. It is, however, readily pre- vented by spraying with potassium sulfide solution. Phyllosticta Ampelopsidis Ell. & Mart, is perhaps closely related to the fungus causi
RMB359MJ–Scab Venturia inaequalis development of disease on the stem upper surface of a Pyracantha leaf
RF2T5PJE1–Rust and powdery mildew on sunflower leaf visible under magnification. A fungal disease of sunflowers caused by Puccinia helianthi (rust) and Golovino
RF2DM29NP–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
RMRE3X2A–. Orcharding. Fruit-culture. Fig. 4. — Showing result of spray injury at blossom-end of fruit and black-rot following (right).. Fig. S. — Leaf-spot caused by black-rot fungus. (From U. S. D. A., B. P. I., Bulletin 121.). 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.. Massachusetts. Dept. of Agriculture. Boston, Wright & Potter printing company, state printers
RF2T5PJDX–Rust and powdery mildew on sunflower leaf visible under magnification. A fungal disease of sunflowers caused by Puccinia helianthi (rust) and Golovino
RF2DM18AX–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
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
RF2DM3H84–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
![. Black rot, leaf spot and canker of pomaceous fruits. Black rot; Leaf spots; Canker (Plant disease); Apples. 64 Bulletin 379 I am informed by Professor H. L. Price of the Department of Horticulture of this Experiment Station that this fall blossoming is not uncommon on trees which are badly affected by the black rot fungus." ETIOLOGY The pathogene here concerned is the fungus Physalospora Cydoniae Arnaud. MORPHOLOGY perithecia. The perithecia have been found by the writer on the twigs of apple (Pyrus mains L.) and of witch-hazel (Hamamelis virginiana L.), and have been described by him i Stock Photo](https://c8.alamy.com/comp/RHJ8X9/black-rot-leaf-spot-and-canker-of-pomaceous-fruits-black-rot-leaf-spots-canker-plant-disease-apples-64-bulletin-379-i-am-informed-by-professor-h-l-price-of-the-department-of-horticulture-of-this-experiment-station-that-this-fall-blossoming-is-not-uncommon-on-trees-which-are-badly-affected-by-the-black-rot-fungusquot-etiology-the-pathogene-here-concerned-is-the-fungus-physalospora-cydoniae-arnaud-morphology-perithecia-the-perithecia-have-been-found-by-the-writer-on-the-twigs-of-apple-pyrus-mains-l-and-of-witch-hazel-hamamelis-virginiana-l-and-have-been-described-by-him-i-RHJ8X9.jpg ". Black rot, leaf spot and canker of pomaceous fruits. Black rot; Leaf spots; Canker (Plant disease); Apples. 64 Bulletin 379 I am informed by Professor H. L. Price of the Department of Horticulture of this Experiment Station that this fall blossoming is not uncommon on trees which are badly affected by the black rot fungus." ETIOLOGY The pathogene here concerned is the fungus Physalospora Cydoniae Arnaud. MORPHOLOGY perithecia. The perithecia have been found by the writer on the twigs of apple (Pyrus mains L.) and of witch-hazel (Hamamelis virginiana L.), and have been described by him i Stock Photo")
RMRHJ8X9–. Black rot, leaf spot and canker of pomaceous fruits. Black rot; Leaf spots; Canker (Plant disease); Apples. 64 Bulletin 379 I am informed by Professor H. L. Price of the Department of Horticulture of this Experiment Station that this fall blossoming is not uncommon on trees which are badly affected by the black rot fungus." ETIOLOGY The pathogene here concerned is the fungus Physalospora Cydoniae Arnaud. MORPHOLOGY perithecia. The perithecia have been found by the writer on the twigs of apple (Pyrus mains L.) and of witch-hazel (Hamamelis virginiana L.), and have been described by him i
RF2DM1MDE–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
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
RF2DM2P0K–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
![. Bulletin. Agriculture. Apr'l, 1912.] SOME APPLE DISEASES—TREATMENT. 19 and 25.) Trees thus robbed of their fohage from year to year must eventually become greatly impaired in their vigor.. Fig. 22.—Early stage of Leaf Spot. The cause of the leaf spot has occasioned no little difficulty. A number of fungi have been found to be present in the spots, but inoculation experiments have indi- cated that Sphoeropsis Malorum is probably the only one that is of importance in the production of the disease. Treatment. The fact that one fungus is responsible for three different forms of disease makes its Stock Photo](https://c8.alamy.com/comp/RH0W1Y/bulletin-agriculture-aprl-1912-some-apple-diseasestreatment-19-and-25-trees-thus-robbed-of-their-fohage-from-year-to-year-must-eventually-become-greatly-impaired-in-their-vigor-fig-22early-stage-of-leaf-spot-the-cause-of-the-leaf-spot-has-occasioned-no-little-difficulty-a-number-of-fungi-have-been-found-to-be-present-in-the-spots-but-inoculation-experiments-have-indi-cated-that-sphoeropsis-malorum-is-probably-the-only-one-that-is-of-importance-in-the-production-of-the-disease-treatment-the-fact-that-one-fungus-is-responsible-for-three-different-forms-of-disease-makes-its-RH0W1Y.jpg ". Bulletin. Agriculture. Apr'l, 1912.] SOME APPLE DISEASES—TREATMENT. 19 and 25.) Trees thus robbed of their fohage from year to year must eventually become greatly impaired in their vigor.. Fig. 22.—Early stage of Leaf Spot. The cause of the leaf spot has occasioned no little difficulty. A number of fungi have been found to be present in the spots, but inoculation experiments have indi- cated that Sphoeropsis Malorum is probably the only one that is of importance in the production of the disease. Treatment. The fact that one fungus is responsible for three different forms of disease makes its Stock Photo")
RMRH0W1Y–. Bulletin. Agriculture. Apr'l, 1912.] SOME APPLE DISEASES—TREATMENT. 19 and 25.) Trees thus robbed of their fohage from year to year must eventually become greatly impaired in their vigor.. Fig. 22.—Early stage of Leaf Spot. The cause of the leaf spot has occasioned no little difficulty. A number of fungi have been found to be present in the spots, but inoculation experiments have indi- cated that Sphoeropsis Malorum is probably the only one that is of importance in the production of the disease. Treatment. The fact that one fungus is responsible for three different forms of disease makes its
RF2DM3E4G–Branches leaves and pear fruits affected by orange rusty spots and horn-shaped growths with spores of the fungus Gymnosporangium sabinae in a human home garden. Pear leaves with pear rust infestation.
RMRG333H–. California plant diseases. Plant diseases. Fig. 72.—Palm leaf spot (Graphiola phoenicis). Fig. 73.—Palm leaf spot (Sphaerodothis neowashingtoniae). trees may be sprayed with the ammoniacal copper carbonate. Bordeaux mixture is effective, but disfigures the tree. Palm (Washingtonia). Leaf Spot (Sphaerodithis neowashingtoniae). Figure 73. The leaves become covered with small, elongated, black, slightly ele- vated spots of the fungus growth, and die.' Affected leaves should be removed.. Please note that these images are extracted from scanned page images that may have been digitally enhanced fo
RMAGWKNN–Camellia leaf spot Pestalotiopsis guepini mature lesion and early infection on adjacent leaf
RF2WR0FJR–Rose rust, Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose tree in summer.
RF2H5NY3P–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
RMRH0W1K–. Bulletin. Agriculture. Fig. 22.—Early stage of Leaf Spot. The cause of the leaf spot has occasioned no little difficulty. A number of fungi have been found to be present in the spots, but inoculation experiments have indi- cated that Sphoeropsis Malorum is probably the only one that is of importance in the production of the disease. Treatment. The fact that one fungus is responsible for three different forms of disease makes its destruction a matter of special importance and rather unusual difficulty. Spraying has been quite effective in controlling the leaf spot. In the summer of 1908 the p
RF2WR0FJW–Rose rust, Phragmidium mucronatum, pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose tree in summer.
RF2H6W01D–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
![. California plant diseases. Plant diseases. Bulletin 218] CALIFORNIA PLANT DISEASES. 1133 Leaf Spot (Cycloconium oleaginum) Causes spots of considerable size on the leaves. No treatment is usually necessary. Dry Rqt Figure 62. Characterized by the appearance of numerous large spots on the fruit which dry and sink in. During some seasons the olive is considerably affected with this trouble. Cause not known. Root Rot (Toadstool disease). See Almond. ONION. Downy Mildew (Peronospora schleideniana). Causes serious losses some years in onions grown for seed during the win- ter. The fungus affects Stock Photo](https://c8.alamy.com/comp/RG33C0/california-plant-diseases-plant-diseases-bulletin-218-california-plant-diseases-1133-leaf-spot-cycloconium-oleaginum-causes-spots-of-considerable-size-on-the-leaves-no-treatment-is-usually-necessary-dry-rqt-figure-62-characterized-by-the-appearance-of-numerous-large-spots-on-the-fruit-which-dry-and-sink-in-during-some-seasons-the-olive-is-considerably-affected-with-this-trouble-cause-not-known-root-rot-toadstool-disease-see-almond-onion-downy-mildew-peronospora-schleideniana-causes-serious-losses-some-years-in-onions-grown-for-seed-during-the-win-ter-the-fungus-affects-RG33C0.jpg ". California plant diseases. Plant diseases. Bulletin 218] CALIFORNIA PLANT DISEASES. 1133 Leaf Spot (Cycloconium oleaginum) Causes spots of considerable size on the leaves. No treatment is usually necessary. Dry Rqt Figure 62. Characterized by the appearance of numerous large spots on the fruit which dry and sink in. During some seasons the olive is considerably affected with this trouble. Cause not known. Root Rot (Toadstool disease). See Almond. ONION. Downy Mildew (Peronospora schleideniana). Causes serious losses some years in onions grown for seed during the win- ter. The fungus affects Stock Photo")
RMRG33C0–. California plant diseases. Plant diseases. Bulletin 218] CALIFORNIA PLANT DISEASES. 1133 Leaf Spot (Cycloconium oleaginum) Causes spots of considerable size on the leaves. No treatment is usually necessary. Dry Rqt Figure 62. Characterized by the appearance of numerous large spots on the fruit which dry and sink in. During some seasons the olive is considerably affected with this trouble. Cause not known. Root Rot (Toadstool disease). See Almond. ONION. Downy Mildew (Peronospora schleideniana). Causes serious losses some years in onions grown for seed during the win- ter. The fungus affects
RF2JC1A5W–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum. Pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose.
RF2H75XTG–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
![. 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/RDE070/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-RDE070.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")
RMRDE070–. 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
RF2JC1A2A–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum. Pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose.
RF2H65B14–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
RMRR0DT7–. Agricultural news. Agriculture -- West Indies; Plant diseases -- West Indies. 398 THE AGRICULTURAL NEWS. Decemcek 10, 1910. FUNGUS NOTES. MISCELLANEOUS FUNGI EXAMINED. RECENTLY Specimens of three interesting fungi have been received recently at the Head Otiice from Mrs. Patterson in St. Vin- cent. They con.sisted of smut of Guinea corn (Ustilaqo sorghi (Link.) Pass), leaf spot of beet due to Cerco^^ora betiriAa, Sacc, and rust of grape leaves {Uredo vitis, Thumen), USTILAGO soRGHi. This fungus attacks the flowers of several species of the genus Sorghum, and of cultivated sorghums such as Gui
RMT9A17E–Strawberry leaf spot (Mycosphaerella fragariae) lesion enlarging and turning red around the spot
RF2JC1A68–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum. Pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose.
RF2H7X6FA–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
![. Bulletin. Agriculture. April, 1912.] SOME APPLE DISEASES—TREATMENT. 17 BLACK ROT, CANKER AND LEAF SPOT. Sphoeropsis Malorum Berk. The three diseases given above have been found to be due to a single fungus, ^'Sphoeropsis Malorum." The black rot of the apple is very common in New Hampshire. It is dark brown or black in color and the affected tissue comparatively firm. It is thus readily distinguished from the soft rots. It may start on any part of the fruit, but often begins at the blossom and fre- quently follows insect stings. The disease is primarily a rot of ripe fruit, but it may of Stock Photo](https://c8.alamy.com/comp/RH0W37/bulletin-agriculture-april-1912-some-apple-diseasestreatment-17-black-rot-canker-and-leaf-spot-sphoeropsis-malorum-berk-the-three-diseases-given-above-have-been-found-to-be-due-to-a-single-fungus-sphoeropsis-malorumquot-the-black-rot-of-the-apple-is-very-common-in-new-hampshire-it-is-dark-brown-or-black-in-color-and-the-affected-tissue-comparatively-firm-it-is-thus-readily-distinguished-from-the-soft-rots-it-may-start-on-any-part-of-the-fruit-but-often-begins-at-the-blossom-and-fre-quently-follows-insect-stings-the-disease-is-primarily-a-rot-of-ripe-fruit-but-it-may-of-RH0W37.jpg ". Bulletin. Agriculture. April, 1912.] SOME APPLE DISEASES—TREATMENT. 17 BLACK ROT, CANKER AND LEAF SPOT. Sphoeropsis Malorum Berk. The three diseases given above have been found to be due to a single fungus, ^'Sphoeropsis Malorum." The black rot of the apple is very common in New Hampshire. It is dark brown or black in color and the affected tissue comparatively firm. It is thus readily distinguished from the soft rots. It may start on any part of the fruit, but often begins at the blossom and fre- quently follows insect stings. The disease is primarily a rot of ripe fruit, but it may of Stock Photo")
RMRH0W37–. Bulletin. Agriculture. April, 1912.] SOME APPLE DISEASES—TREATMENT. 17 BLACK ROT, CANKER AND LEAF SPOT. Sphoeropsis Malorum Berk. The three diseases given above have been found to be due to a single fungus, ^'Sphoeropsis Malorum." The black rot of the apple is very common in New Hampshire. It is dark brown or black in color and the affected tissue comparatively firm. It is thus readily distinguished from the soft rots. It may start on any part of the fruit, but often begins at the blossom and fre- quently follows insect stings. The disease is primarily a rot of ripe fruit, but it may of
RM2C1D9Y3–Frogeye leaf spot (Cercospora sojina) discreet circular lesions on soybean leaf, Florida, USA, May
RF2JC1A6H–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum. Pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose.
RF2H5BR66–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
RMRDA7PP–. Southern field crops (exclusive of forage plants). Agriculture. COTTON BISMASES 419 389. Sore-shin, or damping off (Rhizoctonia). ^ The fungus causing this disease penetrates the stems of the. Fig. 184. — Diseased Leaves, Boll, and Stems op Cotton Plant. Showing several forms of bacterial blight, known on the leaves as angu- lar leaf-spot; on the stems as black arm; and on the bolls as bacterial boll-rot. very young cotton plants just below the surface of the soil. Some of the diseased plants die, while others recover. It is worse in wet weather. Any method of hastening the drying of the sur
RM2C1D9YE–Frogeye leaf spot (Cercospora sojina) discreet circular lesions on soybean leaf, Florida, USA, May
RF2JC1A1R–Rose rust, Phragmidium mucronatum, tuberculatum bulbosum. Pustules (urediospores, teliospores) formed on the lower leaf surface of an ornamental rose.
RF2H52C10–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
RMRM7CGW–. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 6o4 Bulletin 283. It attacks leaves at the tip of the growing shoots and is often serious on nursery stock. The leaves curl and show white mealy growth of the fungus. Dust heavily with sulfur or spray with potassium sulfid, i oz. to 3 gals, water, or with lime-sulfur as for leaf-spot. Powdery mildew. CHRYSANTHEMUM. This is also a fungous disease. Sp
RM2C1D9YK–Frogeye leaf spot (Cercospora sojina) discreet circular lesions on soybean leaf, Florida, USA, May
RF2RGFC6G–Brown rot also called downy mildew or late blight caused by the fungus Phytophthora infestans on tomato in a home garden.
RF2H3P4F8–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
RMRDE36D–. 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
RM2C1D9Y9–Frogeye leaf spot (Cercospora sojina) discreet circular lesions on soybean leaf, Florida, USA, May
RF2RGFC2H–Brown rot also called downy mildew or late blight caused by the fungus Phytophthora infestans on tomato in a home garden.
RF2H4MH6T–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
RMRDCY1B–. Manual of fruit diseases . Fruit. 58 MANUAL OF FRUIT DISEASES but slightly less susceptible are Smith Cider, Maiden Blush and others. The York Imperial, VVinesap, Grimes and Jonathan are only slightlj'injured by blotch. In the East, blotch is rarely destructive and has never been reported from northeastern United States. Apple-blotch, also known as the star-fungus, fruit-blotch, cancer, leaf-spot, and incorrectly as black-scab and late-scab, first attracted attention from Maryland and Texas in 1897. A few years later the same disease was reported from Illinois and in 1903 it was of serious e
RF2RGFCC9–Brown rot also called downy mildew or late blight caused by the fungus Phytophthora infestans on tomato in a home garden.
RF2H30A4W–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
RMRGN5XH–. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture -- Massachusetts. Figure 14. Leaves Affected with the Shot Hole Disease. Photo courtesy of Plant Pathology Department, Cornell University. Figure 13. Tvpical Brown Rot Mummy of Plum The disease Hves over winter in these mummies and in limb cankers. the limb cankers the fungus winters over. Brown rot is fairly eas- to control by spraying thoroughly with wettable sulfur. Leaf spot, or shot hole, caused bv the fungus Coccomyces prunophorae, is a xevy common disease of beach plums. It produces on the leaves round or irregular
RM2DRXH9Y–Phoma leaf spot (Phoma betae) necrotic fungal disease lesions on a sugar beet leaf, Greece
RF2RGFCG4–Brown rot also called downy mildew or late blight caused by the fungus Phytophthora infestans on tomato in a home garden.
RF2H8H4F4–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
RMRG344Y–. California plant diseases. Plant diseases. Bulletin 21SJ CALIFORNIA PLANT DISEASES. 1107 Produces bright orange masses of spores all over the under side of the Leaves. The fungus spreads all through the plant so that it is not easily con- trolled. Cut affected plants to the ground and burn. Spray new growth with Bordeaux mixture. BLACKBERRY. Rust (Oymnocotiia interstitalls). Fig- Leaf Spot (Septoria rubi). ure 36. Produces small dead spots on the leaves. Not usu- ally very serious. Spray with Bor-. Please note that these images are extracted from scanned page images that may have been digita
RMT9A17K–Strawberry leaf spot (Mycosphaerella fragariae) leaf syptoms on strawberry leaves, spots with pale centres
RF2RAXNE1–Rose rust fungus (Phragmidium mucronatum). Common plant pathogen evident as bright orange pustules on budding stalk of dog rose.
RF2H47Y3J–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
![. Bulletin. Agriculture -- New Hampshire. Dec, 1909.] SOME APPLE DISEASES. 123. BLACK ROT, CANKER AND LEAF SPOT. Sphwropsis Malorum Berk. The three diseases given above have been found to be due to a single fungus, "Splioeropsis Malorum." The black rot of the apple is very common in New Hampshire. It is dark brown or black in color and the affected tissue comparatively firm. It is thus readily distinguished from the soft rots. It may start on any part of the fruit, but often begins at the blossom and fre- quently follows insect stings. The disease is primarily a rot of ripe fruit, bu Stock Photo](https://c8.alamy.com/comp/RH0WGW/bulletin-agriculture-new-hampshire-dec-1909-some-apple-diseases-123-black-rot-canker-and-leaf-spot-sphwropsis-malorum-berk-the-three-diseases-given-above-have-been-found-to-be-due-to-a-single-fungus-quotsplioeropsis-malorumquot-the-black-rot-of-the-apple-is-very-common-in-new-hampshire-it-is-dark-brown-or-black-in-color-and-the-affected-tissue-comparatively-firm-it-is-thus-readily-distinguished-from-the-soft-rots-it-may-start-on-any-part-of-the-fruit-but-often-begins-at-the-blossom-and-fre-quently-follows-insect-stings-the-disease-is-primarily-a-rot-of-ripe-fruit-bu-RH0WGW.jpg ". Bulletin. Agriculture -- New Hampshire. Dec, 1909.] SOME APPLE DISEASES. 123. BLACK ROT, CANKER AND LEAF SPOT. Sphwropsis Malorum Berk. The three diseases given above have been found to be due to a single fungus, "Splioeropsis Malorum." The black rot of the apple is very common in New Hampshire. It is dark brown or black in color and the affected tissue comparatively firm. It is thus readily distinguished from the soft rots. It may start on any part of the fruit, but often begins at the blossom and fre- quently follows insect stings. The disease is primarily a rot of ripe fruit, bu Stock Photo")
RMRH0WGW–. Bulletin. Agriculture -- New Hampshire. Dec, 1909.] SOME APPLE DISEASES. 123. BLACK ROT, CANKER AND LEAF SPOT. Sphwropsis Malorum Berk. The three diseases given above have been found to be due to a single fungus, "Splioeropsis Malorum." The black rot of the apple is very common in New Hampshire. It is dark brown or black in color and the affected tissue comparatively firm. It is thus readily distinguished from the soft rots. It may start on any part of the fruit, but often begins at the blossom and fre- quently follows insect stings. The disease is primarily a rot of ripe fruit, bu
RF2J6CRHK–Blackcurrant leaf spot (Pseudopeziza ribes). It is the most dangerous disease that attacks the currant.
RF2H7FY9W–Fungal dangerous diseases of tomatoes, which affects representatives of nightshade especially potatoes. This disease is caused by pathogenic organisms position between fungi and protozoa gray spot
RMRDFE2M–. Manual of tree diseases . Trees. CHAPTER XVII ELM DISEASES. Fig. 21, — Leaf-spot of elm. 152 The elms (Ulmus) are common forest and orna- mental trees east of the Rocky Moimtains. They are exceptionally free from specific diseases caused by parasites. Wound-rots and slime-flux are common in the crotches of the large limbs. Chaining is often necessary to prevent split- ting at the crotches. Leaf-Spot Caused by Gnomonia idmea (Sace.) Thiim. This is the most com- mon of the leaf-spot dis- eases of elm. In wet seasons, the spots become so abundant that defolia- tion results. The fungus causing t
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