RF2DM4GP7–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.
RMRDE4MC–. Minnesota plant diseases. Plant diseases. Minnesota Plant Diseases. 79 health of the host. Certam smuts and powdery mildews may also be confined to small and limited areas. In the former case the area is converted into a smut heap while in the latter it be- comes mildewed and later dotted with • the very small spore cases. Most smuts and mildews, however, are not restricted to small areas. The mildews are seldom confined to small areas. Fig. 35.—Strawberry leaf-spot. The fungus (Sphaerella fragariae) destroys small areas of the leaf. Original. of the leaf surface or even to the leaf itself,
RMAGP86G–Alternaria leaf spot Alternaria sp on cultivated orchid leaf Thailand
RF2JGFNGW–Symptoms of fungal infection on a cereal leaf.
RF2DM575H–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.
RMRDEX4N–. Diseases of economic plants . Plant diseases. DISEASES OF ECONOMIC PLANTS fungi have been isolated from these spots/ some of them may sustain a causal relation to the disease. Whatever the actual causal fungus may be, these spots are all, or nearly all, of fungous ori- gin and are amenable to preventive spraying with Bordeaux mixture. The first of three or four appUcations should be given with the opening of the leaf buds. Illosporiose, leaf spot (Illosporium malijolio- rum Shel.). — This is said by Sheldon- to be the cause of much of the defoliation of apple or- chards in West Virginia and
RMB0AJPT–Sclerotinia leaf spot Sclerotinia candolleana infection on oak leaves
RF2JGFNJC–Symptoms of fungal infection on a cereal leaf.
RF2DM62AP–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.
RMRG334J–. California plant diseases. Plant diseases. 1148 UNIVERSITY OF CALIFORNIA—EXPERIMENT STATION. duces a dark brown mold on the surface of the spots. This fungus, how- ever, has nothing to do with originating any form of spot upon citrus fruit. Palm (Phoenix canariensis, dactylifera, etc.). Leaf Spot (Graphiola phoenicis). Figure 72. Injures the lower leaves of the date palms with the production of minute black protuberances of the fungus, mostly on the lower side of the leaves. Remove all affected leaves, and if this fails to control the trouble the. Please note that these images are extracted
RMA79GRP–Ascochyta leaf spot Ascochyta sp on white clover leaf
RF2JGFNJG–Symptoms of fungal infection on a cereal leaf.
RF2DM3DG6–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.
RMRDJ632–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 366 FUNGOUS DISEASES OF PLANTS. disease is distinguished from the leaf spot by smaller spots more colored when young and more nearly circular. They are also less clearly defined on the under surfaces. The blight also attacks the fruit. In this case the spots are at first red but later darker in color. The drying of the surface layers accom- panying the effects of this disease may cause a cracking very much as in the case of pear scab. The fungus. The larger spots of the leaf blight
RMAT9JAP–Tomato leaf spot Septoria lycopersici leaf spotting on tomato
RF2WRT3KR–Powdery mildew on wheat leaf. A fungal disease of cereal crops.
RF2DM3J64–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.
RMRJBG7X–. Celery culture; a practical treatise on the principles involved in the production of celery for home use and for market, including the selection of soil, production of plants, cultivation, control of insects and diseases, marketing and uses. Celery. DISEASES OF CELERY 8l appearance. Leaf spot is caused by the fungus which bears the name Phyllosticta apii^ and differs from the blight in that it makes its appearance in. FIG. S3—CELERY LEAF AFFECTED WITH LEAF-SPOT {Phyllosticta apii) (Redrawn from Halsted) the form of dark brown spots and gradually spreads until the whole leaf is covered. Celer
RMB7DCPJ–Photomicrograph of leaf spot Cercospora beticola lesion on a sugar beet leaf
RF2WRT3F2–Powdery mildew on wheat leaf. A fungal disease of cereal crops.
RF2DM2K1A–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.
RMRJBG71–. Celery culture; a practical treatise on the principles involved in the production of celery for home use and for market, including the selection of soil, production of plants, cultivation, control of insects and diseases, marketing and uses. Celery. DISEASES OF CELERY 8l appearance. Leaf spot is caused by the fungus which bears the name Phyllosticta apii^ and differs from the blight in that it makes its appearance in. FIG. SS—CELERY LEAF AFFECTED WITH LEAF-SPOT (Phyllosticta apii) (Redrawn from Halsted) the form of dark brown spots and gradually spreads until the whole leaf is covered. Celer
RMD1YTY4–Sporulating grey mould (gray mold) on mature Pelargonium pot plant
RF2R8R6RE–Fungal disease of strawberry. Spots visible on strawberry leaf.
RF2DM2R07–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.
RMRDBFTN–. Diseases of greenhouse crops and their control . Vegetables; Plant diseases; Plant diseases. Fig. i8. Celery Disease. a. Septoria leaf spot, b. cross section through leaf to show relationship of fungus to its host, c. spores of Septoria petroselini {a-c after Coons),. 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, 1884-1937. New York : E. P. Dutton
RMD1YTX3–Sporulating grey mould (gray mold) on mature Pelargonium pot plant
RF2JGFNJF–Aphids and fungal disease symptoms on a cereal leaf.
RF2DM1JXY–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.
RMRM7HGH–. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Some Important Pear Diseases. 279 orchards, trees in turf and in small garden lots are more affected than a properly cultivated orchard. 5. Occurrence in the Nursery. The principal nursery regions which I have examined in this con- nection are those in the vicinity of Dansville, Geneva, and Cayuga. While the leaf-blight is the financial bane of seed- ling pears, this leaf-spot is uniformly the fungus monopolist of budded stock after the first year. Budde
RMD1YTXG–Sporulating grey mould (gray mold) on mature Pelargonium pot plant
RF2JGFNJB–Aphids and fungal disease symptoms on a cereal leaf.
RF2DM2KWX–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.
RMRDJ62N–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. disease is distinguished from the leaf spot by smaller spots more colored when young and more nearly circular. They are also less clearly defined on the under surfaces. The blight also attacks the fruit. In this case the spots are at first red but later darker in color. The drying of the surface layers accom- panying the effects of this disease may cause a cracking very much as in the case of pear scab. The fungus. The larger spots of the leaf blight will generally show at the time
RMAD0APM–Palm false smut Graphiola phoenicis pustules on palm leaf surface
RF2JCAGWP–Stripe Rust on Wheat Leaf (Puccinia striiformis)
RF2DM1AN1–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.
RMRH9G4G–. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. 134. The cultivated mushroom, a saprophytic plant. fungus is called mycelium. Some of the hyphse finally grow- out of the leaf and produce spores or reproductive cells which answer the purpose of seeds in distributing the plant (6, Fig. 137). 195. The ab- normal condition produced in plants by fungous and bacterial parasites and by other agents is known as a dis- ease. On some plants, the disease takes the form of a leaf-spot or a blight; in others swellings or galls are produced. Cankers on
RMACP0PH–Palm false smut Graphiola phoenicis pustules on palm leaf surface
RF2KFM7FH–Powdery mildew on the parsley leaf. This is a dangerous plant disease that causes yield losses.
RF2DM1A90–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.
RMRFC9FE–. Catalog 1935. Nurseries (Horticulture) Tennessee Memphis Catalogs; Nursery stock Tennessee Memphis Catalogs; Flowers Tennessee Memphis Catalogs; Vegetables Tennessee Memphis Catalogs; Fruit Tennessee Memphis Catalogs; Gardening Tennessee Memphis Equipment and supp. DUSTING SULPHUR Keep your roses free from mildew, black spot, leaf spot and other hideous fungus dis- eases. Dusting Sulphur is a tonic for roses, chrysanthemums, phlox, delphiniums, sweet peas, lilacs, snapdragons and carnations—to make these flowers and many other plants yield their full measure of sweetness and beauty. 3-lb. si
RMAD0B5Y–Palm false smut Graphiola phoenicis pustules sporulating on a palm leaf surface
RF2KFM7FD–Powdery mildew on the parsley leaf. This is a dangerous plant disease that causes yield losses.
RF2DM2RXE–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.
RMRFC9FT–. Catalog 1935. Nurseries (Horticulture) Tennessee Memphis Catalogs; Nursery stock Tennessee Memphis Catalogs; Flowers Tennessee Memphis Catalogs; Vegetables Tennessee Memphis Catalogs; Fruit Tennessee Memphis Catalogs; Gardening Tennessee Memphis Equipment and supp. DUSTING SULPHUR Keep your roses free from mildew, black spot, leaf spot and other hideous fungus dis- eases. Dusting Sulphur is a tonic for roses, chrysanthemums, phlox, delphiniums, sweet peas, lilacs, snapdragons and carnations—to make these flowers and many other plants yield their full measure of sweetness and beauty. 3-lb. si
RMAD0B4N–Palm false smut Graphiola phoenicis pustules sporulating on a palm leaf surface
RF2KFM750–Powdery mildew on the parsley leaf. This is a dangerous plant disease that causes yield losses.
RF2DM3G83–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.
RMRH9G56–. Botany for secondary schools; a guide to the knowledge of the vegetation of the neighborhood. Plants. 92 DEPENDENT PLANTS. 134. The cultivated mushroom, a saprophytic plant. fungus is called mycelium. Some of the hyphse finally grow- out of the leaf and produce spores or reproductive cells which answer the purpose of seeds in distributing the plant (6, Fig. 137). 195. The ab- normal condition produced in plants by fungous and bacterial parasites and by other agents is known as a dis- ease. On some plants, the disease takes the form of a leaf-spot or a blight; in others swellings or galls are
RMACRBDP–Palm false smut Graphiola phoenicis pustules sporulating on a palm leaf surface
RF2JPAGNG–Chlorotic spots on hibiscus leaf, a fungal disease.
RF2DM2KC3–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.
RMRF2XTE–. Catalog 1935. Nurseries (Horticulture) Tennessee Memphis Catalogs; Nursery stock Tennessee Memphis Catalogs; Flowers Tennessee Memphis Catalogs; Vegetables Tennessee Memphis Catalogs; Fruit Tennessee Memphis Catalogs; Gardening Tennessee Memphis Equipment and supp. DUSTING SULPHUR Keep your roses free from mildew, black spot, leaf spot and other hideous fungus dis- eases. Dusting Sulphur is a tonic for roses, chrysanthemums, phlox, delphiniums, sweet peas, lilacs, snapdragons and carnations—to make these flowers and many other plants yield their full measure of sweetness and beauty. 3-lb. si
RMAD0B1W–Palm false smut Graphiola phoenicis pustules before sporulation on palm leaf surface
RF2M1795N–Aecia of Barley crown rust (Puccinia coronata) on green leaf of Rhamnus cathartica or Purging buckthorn.
RF2DM1KT3–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.
RMRF2XW0–. Catalog 1935. Nurseries (Horticulture) Tennessee Memphis Catalogs; Nursery stock Tennessee Memphis Catalogs; Flowers Tennessee Memphis Catalogs; Vegetables Tennessee Memphis Catalogs; Fruit Tennessee Memphis Catalogs; Gardening Tennessee Memphis Equipment and supp. DUSTING SULPHUR Keep your roses free from mildew, black spot, leaf spot and other hideous fungus dis- eases. Dusting Sulphur is a tonic for roses, chrysanthemums, phlox, delphiniums, sweet peas, lilacs, snapdragons and carnations—to make these flowers and many other plants yield their full measure of sweetness and beauty. 3-lb. si
RMBX13YK–Sunflower crop defoliated and severely affected by leaf blight (Alternaria helianthi), South Africa
RF2HW6GB6–Fungal disease Powdery mildew on zucchini foliage. Disease caused by, among others, the fungus Sphaerotheca fuliginea.
RF2DM17PE–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.
RMRG34DA–. California plant diseases. Plant diseases. Bulletin 218] CALIFORNIA PLANT DISEASES. 1095 APRICOT. Shot-Hole and Fruit Spot (Coryneum beyerinkii). Figure 22. This fungus is the same as that causing the peach blight and produces in the apricot a spotting of the fruit, shot-hole effect in the leaves and killing of the buds. Spray with Bordeaux mixture during November and again in spring just as the buds open. See bulletin 203, page 33, California Experiment Station.. Fio. 22.—Apricot shot-hole and leaf spot (.Coryneum beyerinkii),. Please note that these images are extracted from scanned page i
RMT9A17J–Leaf blight (Phomopsis obscurans) common fungal disease causing a V-shaped lesions at the leaf edge with pycnidia on a strawberry leaf
RF2WK8EN3–Wheat leaf or brown rust Puccinia trticina (recondita) erupting sporulating pustules on a cereal.
RF2DM2AAH–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.
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
RMA79GPR–Pseudopeziza leaf spot Pseudopeziza spp leaf spots on white clover leaf
RF2WK8EDX–Wheat leaf or brown rust Puccinia trticina (recondita) erupting sporulating pustules on a cereal.
RF2DM2RGB–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.
RMRDJ65K–. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 358 FUNGOUS DISEASES OF PLANTS XLIX. LEAF SPOT OF THE PEAR Septoria Pyricola Desm. Duggar, B. M. Some Important Pear Diseases. Leaf Spot. Cornell Agl. Exp. Sta. Built. 145: 597-611. figs. 157-163. 1898. The leaf spot of pear is a disease which may be readily dis- tinguished from the leaf blight subsequently described. It occurs throughout the eastern United States as an important fungus, both. Fig. 176. Leaf Spot of Pear in orchards and nurseries. It is probably found throughout No
RMAPBF8K–Leaf spot (Ascochyta fabae) lesions field bean leaf
RF2WK8EMR–Wheat leaf or brown rust Puccinia trticina (recondita) erupting sporulating pustules on a cereal.
RF2DM2MX9–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.
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
RMC8748H–Septoria leaf spot (Phaeospaeria nodorum) lesion on wheat leaf
RF2WK8EE5–Wheat leaf or brown rust Puccinia trticina (recondita) erupting sporulating pustules on a cereal.
RF2DM18RD–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.
RMRCC6AR–. Diseases of economic plants. Plant diseases. TREES AND TIMBER 433 gray border. The spots, from 3-6 mm. in diameter, often coalesce to form large blotches which are fragile, sometimes dropping from the leaf. Young leaves develop poorly and are deformed, while severe infection may cause complete defoliation of the tree.. Fig. 188. — " Cedar apple," gall of the rust fungus. Original. Macrosporiose (Macrosporium Catalpce Ell. & Mart.).— This spot is scarcely distinguishal)le from phyllostictose except through the absence of pycnidia and the presence of a scant quantity of black mol
RMBDD9F9–Cercospora leaf spot (Cercospora beticola) infection on a sugar beet leaf
RF2WK8EDH–Wheat leaf or brown rust Puccinia trticina (recondita) erupting sporulating pustules on a cereal.
RF2DM1030–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.
RMRCDNWB–. Diseases of fruits and nuts. Fruit; Nuts. 46 California Agricultural Extension Service [Cir. 120 usually happens in places or at times when there is a good deal of fog or moisture in the air. If this trouble is serious, keep the tops thinned out as much as possible by pruning. Do not pick berries when wet. Pick closely to avoid over- ripening, and remove all moldy fruits. Leaf and Cane Spot.—Small, dead spots with brown or reddish mar- gins on leaves and canes are characteristic of this disease. On the Young blackberry, this fungus, Mycosphaerella ruhi, appears to be the cause of a cane blig
RMBKKFN4–Fabrea leaf spot (Fabra maculata) spotting on a pear leaf, USA
RF2WK8EEW–Wheat leaf or brown rust Puccinia trticina (recondita) erupting sporulating pustules on a cereal.
RF2DM19TT–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.
RMRCDPB2–. Diseases of economic plants. Plant diseases. TREES AND TIMBER 433 gray border. The spots, from 3-6 mm. in diameter, often coalesce to form large blotches which are fragile, sometimes dropping from the leaf. Young leaves develop poorly and are deformed, while severe infection may cause complete defoliation of the tree.. Fig. 188. — " Cedar apple," gall of the rust fungus. Original. Macrosporiose (Macrosporium Catalpce Ell. & Mart.).— This spot is scarcely distinguishable from phyllostictose except through the absence of pycnidia and the presence of a scant quantity of black mold
RMBGHA7N–Leaf spot (Septoria apiicola) on celery leaves
RF2WK8E9R–Wheat leaf or brown rust Puccinia trticina (recondita) erupting sporulating pustules on a cereal.
RF2DM1MYX–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.
RMRCCK51–. Diseases of wheat, oats, barley, and rye. Grain. 128 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 48 entire leaf. If a spot becomes somewhat elongated, much of the tissue above and below it loses its green color. If a spot is very broad, all of the leaf beyond the spot dies. Life History.—The scald fungus apparently overwinters on dead or living tissue of rye and wild hosts. Initial infection each year occurs from spores. On leaves infected in the fall, typical scald spots appear early the following spring. In the cool weather of spring, spores of the fungus are produced abundantly in these. Fig
RMBG75RY–Dark leaf spot (Alternaria brassicicola) lesions on a cabbage leaf
RF2WK8EEM–Wheat leaf or brown rust Puccinia trticina (recondita) erupting sporulating pustules on a cereal.
RF2DM3F5T–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.
RMRCC68X–. Diseases of economic plants. Plant diseases. Trees and Timber 393 and die as though frosted. Young leaves and shoots are killed and by their death induce abnormal branching, result- ing in a compact head. The disease seems limited to young trees. Bordeaux mixture is advised — three or more sprayings.. Fig. 208. — Maple tar-spot. After Heald. Thrombosis (Verticillium).—-Leaves wilt and branches die due to plugging of the veins by the fungus. Dark streaks show in the wood of affected twigs. MULBERRY Blight (Bacterium niori B. & L.). —Upon the leaf small, reddish-brown spots, pellucid when
RMAGWKTH–Unconfirmed leaf spot possibly one of several fungi on an ivy leaf Hedera helix
RF2WK8EEF–Wheat leaf or brown rust Puccinia trticina (recondita) erupting sporulating pustules on a cereal.
RF2DM3F5H–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.
RMRCDPB3–. Diseases of economic plants. Plant diseases. Trees and Timber 393 and die as though frosted. Young leaves and shoots are killed and by their death induce abnormal branching, result- ing in a compact head. The disease seems limited to young trees. Bordeaux mixture is advised — three or more sprayings.. Fig. 208. — Maple tar-spot. After Heald. Thrombosis {Verticillium). — Leaves wilt and branches die due to plugging of the veins by the fungus. Dark streaks show in the wood of affected twigs. MULBERRY Blight {Bacterium mori B. & L.). —Upon the leaf small, reddish-brown spots, pellucid when
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