RMBX62EX–Leaf spot (Mycosphaerella pinodes) damage on pea leaflets
RF2T0GNN7–Rust of sunflower. A fungal disease of sunflowers caused by Puccinia helianthi.
RF2H3AWAN–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
RMRHJ8N3–. Black rot, leaf spot and canker of pomaceous fruits. Black rot; Leaf spots; Canker (Plant disease); Apples. /. NEW YORK APPLE TREE CANKER r. Twenty Ounce apple tree, some of the larger limbs of which have been girdled by the fungus. Evidence that this has occurred is found in the defoliated tops of affected limbs j. External view at left, and internal view at right, of young black rot lesions on apple; the specimen on the right shi iws the I issues invi >lved. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - color
RMECF34H–A leaf spot, Ramularia rubella, seriously affecting a leaf of broad dock, Rumex obtusifolius, Berkshire, May
RF2T0GNK2–Rust of sunflower. A fungal disease of sunflowers caused by Puccinia helianthi.
RF2H868DR–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
RMRFPWG4–. Some diseases of Puerto Rican forage crops. Forage plants Diseases and pests Puerto Rico. -4 B Figure 2.—A, Leaf spot on Bouteloua heterostega (lamilla) caused by an unidenti- fied species of Helminthosporium. X 3.5. B, Spore of the fungus. X 528. Paragiiita At the time of the survey, the disease incidence on Chloris inflata Link (paragiiita) was limited. There were no diseases of outstand- ing prevalence. Bermuda Grass Rust Rust of Cynodon dactylon (L.) Pers. (Bermuda grass, hala que te quedas) is caused by Puccinia cynodontis Lecroix. This disease has been found to some extent at all times
RM2DRXJNE–Angular leaf spot (Phaeoisariopsis griseola) lesions on green bean (Phaseolus vulgaris) leaf, Thailand
RF2T0GNJX–Rust of sunflower. A fungal disease of sunflowers caused by Puccinia helianthi.
RF2H6GY0W–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
RMRDE3C5–. Diseases of economic plants . Plant diseases. SMALL FRUITS 181 STRAWBERRY Leaf spot {Sphaerella fragarix (Tul.) Sacc). — The most conspicuous disease of the strawberry, one nearly al- ways present to some extent on both wild and culti-. FiG. 78. — Strawberry leaf spot. After Freeman. vated varieties, is known by the presence of small 4-6 mm. purple or red bordered spots upon the leaves, the older spots bearing white or ashen centers. Late in the development of the spots the hyphae of the causal fungus are barely visible in these centers with a good hand lens. The spots, when numerous, may co
RM2DRXJD9–Angular leaf spot (Phaeoisariopsis griseola) lesions on green bean (Phaseolus vulgaris) leaf, Thailand
RF2JACGMW–Infectious phyllody by Phytoplasma. Deformed strawberry flowers.
RF2HN2MR8–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
RMRG3424–. California plant diseases. Plant diseases. 1112 UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. Root Knot (Nematode). Figure 41. Causes swellings all over the main and smaller roots. Found only in greenhouses. See page 1076. Control as in Stem Rot. Leaf Spot (Altcrnaria hrassicw, var. nigresccns). This fungus has been known to do considerable damage in a few cases, causing large dead spots, later covered with the black fruiting fungus. Not important as yet. Can be controlled with Bordeaux mixture. CURRANT. Mildew (Sphaerothcca mors-uvw). A white, powdery mildew on the leaves and fruit. Dust wit
RF2JACGND–Infectious phyllody by Phytoplasma. Deformed strawberry flowers.
RF2J8APE1–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
RMRDBFB1–. Diseases of greenhouse crops and their control . Vegetables; Plant diseases; Plant diseases. Fig. 6i. Palm Diseases. a. Palm smut, b. Palm smut fungus (after Stone and Smith), c. Exospo- rium leaf spot, d. cluster of spores of Exosporium palmivorum, e. individual spores of E. palmivorum, f. conidiophores of E. palmivorum (.d-e after Tre- lease), g. Sphserodothis leaf spot (after Smith, R, E.), h. anthracnose (after Halsted).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustra
RF2JACGYE–Infectious phyllody by Phytoplasma. Deformed strawberry flowers.
RF2HKEFHH–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
RMRHJ8BR–. Black rot, leaf spot and canker of pomaceous fruits. Black rot; Leaf spots; Canker (Plant disease); Apples. Black Rot, Leaf Spot, and Canker of Pomaceous Fruits hi a row of cells with dark-stained walls is seen in the leaf (Fig. 32). They are arranged in a direct line from the upper to the lower epi- dermis. This involves the palisade cells and the spongy parenchyma, the latter tissue now being composed of more densely packed, but large, cells. With the advance of the fungus this layer increases in size and number of cells until the diameter is increased over that of the normal part. An addi
RMBYXK1D–Dreschlera leaf spot (Drechslera siccans) spotting on infected ryegrass leaves
RF2JACGMM–Infectious phyllody by Phytoplasma. Deformed strawberry flowers.
RF2J0KHPF–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
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
RMD48MXP–Leaf spot, Mychosphaerella pinodes, lesions on pea crop leaves and pods
RF2R8R70J–Fungal disease, symptoms on ornamental roses in the garden.
RF2HFCP7H–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
RMREKBAA–. Civic biology; textbook of problems, local and national, that can be solved only by civic coöperation. Biology. 212 CIVIC BIOLOGY (the host is the organism that supports a parasite), hi which he hsts 174 plants, with the fungi that attack each. From this we see that everything Ave try to raise has its fungus enemies: alfalfa has anthracnose, leaf spot, root gall, European root disease, and root rot; the apple has 2-i, among them anthracnose, or l^itter rot, tire blight, crown gall, rust, and scab; beans have 7 : corn, (3; cotton, 9 : the grape, 9 ; potato, 6 : tomato, 8 ; wheat, 7 : violet,
RMD48N13–Leaf spot, Mychosphaerella pinodes, lesions on pea leaflets
RF2R8R6GW–Fungal disease, symptoms on ornamental roses in the garden.
RF2HPT6A0–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
RMRM8NKG–. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, N.Y. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 190 Bulletin 252. Scab.. Fig. 162. Alfalfa leaf-spot. APPLE. Commonly known among growers as " the fungus." Usually most evident on the fruit. Spray with Bordeaux 5--5"50 o^ 3-3-50; first, just before the blossoms open; second, just as the blossoms fall; third, 10 to 14 days after the hlossoms fall. The second spraying seems to be the most important. Spray thoroughly. For the use of insect poisons with Borde
RMD48N09–Leaf spot, Mychosphaerella pinodes, lesions on pea leaflets
RF2JPAGJW–White round spots on the leaves of cucumber in the garden, a fungal disease.
RF2HCB238–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
RMRM8NK3–. Annual report of the Cornell University Agricultural Experiment Station, Ithaca, N.Y. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). Fig. 162. Alfalfa leaf-spot. APPLE. Commonly known among growers as " the fungus." Usually most evident on the fruit. Spray with Bordeaux 5--5"50 o^ 3-3-50; first, just before the blossoms open; second, just as the blossoms fall; third, 10 to 14 days after the hlossoms fall. The second spraying seems to be the most important. Spray thoroughly. For the use of insect poisons with Bordeaux mixture, see codling-
RMB0AGY8–Septoria leaf spot Zymoseptoria tritici syn Mycosphaerella graminicola on CzV8 culture plate
RF2JPAGKA–White round spots on the leaves of cucumber in the garden, a fungal disease.
RF2JB5760–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
RMRDFE05–. Manual of tree diseases . Trees. MAPLE DISEASES 227 In wet seasons defoliation may result. The illustrations show the effect of these diseases on the leaf (Figs. 37 and 38). Many of the other leaf-spots of maple appear similar to these, however, and no accurate determination can be made without a microscopic ex- amination of the fungus. The leaf-spot caused by Phyllo- sticta minima is characterized by light brown cir- cular spots with numerous black dot-like fruiting- bodies near the center (Fig. 37). The general char- acters of leaf- spots, and the life history of the fungi causing them, ar
RMB0AF43–Septoria leaf spot (Phaeosphaeria nodorum) culture on CzV8 petri dish
RF2J9MC1J–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
RMRG32MT–. California plant diseases. Plant diseases. 1166 UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. SORGHUM. Smut (Sphacelotheca sorghi and S. reiliana). This crop is affected by two different smut fungi in California, the former developing a black, dusty mass of spores in place of the seeds of the grain, while the latter breaks out in swellings on the plant itself, containing the black, smutty spore masses like corn smut. Use seed from fields free of smut. STRAWBERRY. Leaf Spot (Sphaerella fragarice). Figure 88. This fungus produces on the leaves numerous small dead spots with dark purple margins.
RMAGHKTK–Iris leaf spot Mycosphaerella macrospora spotting on iris leaves
RF2JNRF9M–Powdery mildew Podosphaera leucotricha primary infection on apple flower buds
RF2HX6HRX–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
RMRDBFEG–. Diseases of greenhouse crops and their control . Vegetables; Plant diseases; Plant diseases. Fig. 46. Carnation Diseasbs. a. White tip (after Clinton), b-f. carnation rust parasite (after Blodgett, F. H.), g. stigmanose (after Woods), h. Septoria leaf spot (after Potter, M. C), »• pycnidia of Septoria dianthi, j. pow- dery mildew fungus (after Mercer, W. B.).. 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, Ja
RMA530EK–Dianthus leaf spot Septoria dianthi infection on stem and leaves of pink Dianthus spp
RF2JNRFB6–Powdery mildew Podosphaera leucotricha primary infection on apple flower buds
RF2J1CEMY–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
RMREN4D0–. Lime-sulphur wash [microform]. Fruits; Spraying and dusting in agriculture; Pulvérisation et poudrage en agriculture; Insect pests; Fruit; Insectes nuisibles, Lutte contre les. Chkrsy Leaf-spot or Shot-hole Fungus. (Cylindrosporium padi, Karst.). Fig. 17. Cherry Leaf-spot or Shot-hole Fungus. boiJ'liSriJjihuyaoT'Tot^r^^ ' -'^ '^^ - SO or self- spray first aboJt fou weeks' afte^ L lZT''T'''! ^'' '' ^°) «"^ ately after the fruit is Sed or * 1 °,f """^/?"' ^"^ ^"0"^ immedi- weeks later may bi necSsary' °'"^'°"«"y ^ ^^ird spraying about two
RMAXYWGY–Leaf spot Ramularia deflectens on pansy Viola sp ornamental annual
RF2JNRF9W–Powdery mildew Podosphaera leucotricha primary infection on apple flower buds
RF2J5P84C–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
RMRHJ8KT–. Black rot, leaf spot and canker of pomaceous fruits. Black rot; Leaf spots; Canker (Plant disease); Apples. Bulletin* 379 Plate XIV. INOCULATION EXPERIMENTS WITH PHYSALOSPORA CYDONI.E i. Canker on right, check on left. Inoculation made July i, 1912, using pycnospores from pear, the fungus having followed fire blight. Photograph made September 20, 19*3 2. Comparison of two different apple strains on pear. Specimen shown on left inoculated with ascospores from apple. Specimen shown in center inoculated with pycnospores from apple, following fire blight. The very slight infection should be note
RMBBPJ6M–Leaf spot Drechslera sorokiniana on grass leaves
RF2JNRFB4–Powdery mildew Podosphaera leucotricha primary infection on apple flower buds
RF2J823BW–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
RMRCDHD9–. Diseases of small grain crops in Illinois. Grain. 66 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 35 the leaf to assume a withered appearance, as if injured by adverse weather conditions. As the badly diseased leaves die, they change from green to pale yellow or gray, and the brown of the diseased spots fades. 'The oats head sometimes becomes infected. Then. Fig. 22.—Helminthosporium leaf spot of oats. Leaf infection by Helmintho- sporium causes dying of narrow, oblong strips of leaf tissue between veins. The dead tissues turn rustv brown. the fungus enters the hull surrounding the kernel and ma
RMB6374D–Leaf spot Pyricularia grisea symptoms on foxtail millet leaves
RF2JNRFAX–Powdery mildew Podosphaera leucotricha primary infection on apple flower buds
RF2JA2EP4–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
RMRCDP67–. Diseases of flowers and other ornamentals. Flowers; Plant diseases. Diseases of Flowers and Other Ornamentals 53 Leaf Spot.—The foliage of photinia, or Christmas berry, is often dis- figured and shabby-looking on account of dead spots on the leaves (fig. 20). Fabraea maculata and several other less common species of fungi, and various insects contribute to this effect. F. maculata is the cause of a common leaf and fruit spot of the pear in the eastern parts of the country but is not known on this host in California. The fungus may not. Fig. 20.—Leaf spot on photinia. be identical in the two
RMBGA695–Hellebore leaf spot (Microsphaeropsis hellebori) on garden hellebore plant
RF2JNRF9T–Powdery mildew Podosphaera leucotricha primary infection on apple flower buds
RF2HEENPT–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
RMRCDPRN–. Diseases of economic plants. Plant diseases. 88 DISEASES OF ECONOMIC PLANTS fungi have been isolated from these spots,1 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 applications should be given with the opening of the leaf buds. Illosporiose, leaf spot (Illosporium malifolio- rum Shel.). — This is said by Sheldon2 to be the cause of much of the defoliation of apple or- chards in West Virginia
RMB02JJG–Dianthus leaf spot Septoria dianthi infection on stem and leaves of pink Dianthus spp
RF2JNRF9Y–Powdery mildew Podosphaera leucotricha primary infection on apple flower buds
RF2HRR1KC–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
RMRCC6NW–. Diseases of economic plants. Plant diseases. DISEASES OF ECONOMIC PLANT, 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 applications should be given with the opening of the leaf buds. lUosporiose, leaf spot (Illospor i urn malifolio- rum Shel.). — This is said by Sheldon- to be the cause of much of the defoliation of apple or- chards in West Virginia an
RMAXEH1R–Septogloeum leaf spot Septogloeum oxysporum lesions on sampled yorkshire fog leaves
RF2H6XNFE–Fungal disease Powdery mildew on zucchini foliage.
RF2J6B6CT–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
RMRCDK3C–. Diseases of greenhouse crops and their control. Vegetables; 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, J. J. (Jacob Joseph), 1885-. New York, E. P. Dutton & company
RMBGDDHR–Iris leaf spot (Mycosphaerella macrospora) spotting and necrosis to iris leaves and plants
RF2MM8P4A–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RF2H9M7K6–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
RMRCCK7X–. Diseases of truck crops / Ralph E. Smith. Plant diseases; Plant parasites; Vegetables; Agricultural pests. Diseases of Truck Crops 63 true rust, and breaks out in small, red, spore pustules on the leaves and stems (fig. 30). It also attacks broad bean, but is not important. Septoria Leaf Spot, Leaf Blotch.—The affected leaves become spotted with indefinite, yellow to brown blotches and are blighted much as in ascochyta blight. Pods and seeds may become infected with this fungus. Please note that these images are extracted from scanned page images that may have been digitally enhanced for rea
RMC14HMJ–Dianthus leaf spot (Septoria dianthi) infection on stem and leaves of pink (Dianthus spp.)
RF2MM8HKM–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RF2HXFWAX–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
RMRCDP8X–. Diseases of field crops. Plant diseases. 14 California Agricultural Extension Service [Cir. 121 Alfalfa seriously affected with nematode should be plowed up and the land kept in a cultivated crop for at least three years with special care to completely kill out every plant of alfalfa. Yellow Leaf Blotch.—This is a leaf-spot disease caused by the fungus Pyrenopeziza medicaginis. It is distinguished from ordinary leaf spot, which is caused by a different fungus (p. 11), by the fact that the spots. Fig. 8.—Effects of stem nematode on alfalfa. are of a bright yellow or orange color, with little
RMB359JF–Scab Venturia inaequalis development of disease on the underside of a Pyracantha leaf
RF2MM8P8X–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RF2J3Y46N–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
RMRCDHFB–. Diseases of small grain crops in Illinois. Grain. 26 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 35 fungus. Other names frequently used for this disease are leaf spot, nebular leaf spot and Septoria leaf spot. It is primarily a cool weather disease, attacking only leaves and sheaths and doing its greatest damage when the plant is not very active. Besides wheat, it attacks rye and bluegrass. Appearance.—Speckled leaf blotch is most conspicuous early in the spring, when it appears as irregular, longitudinal, reddish- brown, often ashen-centered spots of various sizes scattered. Fig. 8.—Speckled l
RMB359GF–Scab Venturia inaequalis development of disease on the underside of a Pyracantha leaf
RF2MM8HRD–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RF2J48J2H–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
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
RMAPP6RJ–Cercospora leaf spot Cercospora coffeicola on the cotyledons of a seedling coffee bush
RF2MM8P5G–Red rust of stone fruit, rust stone fruit or plum rust. A fungal disease of plum caused by Tranzschelia pruni-spinosae or T. discolor.
RF2J5ENMD–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
RMRCDP83–. Diseases of flowers and other ornamentals. Flowers; Plant diseases. Diseases of Flowers and Other Ornamentals 11 Leaf Spot.—Large, dead, dark-colored, unsightly patches are caused on the leaves and petioles of growing plants by the fungus Phyllosticta Richardiae. To control, avoid overwatering the foliage. Callas which are. 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.. Smith, Ralph E. (Ralph Eliot), 1874-1953. Berkeley,
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