Black stem rust Puccinia graminis pustules on wheat stem USA

RMID:A3W5ND

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Contributor:

Nigel Cattlin / Alamy Stock Photo

Image ID:

A3W5ND

File size:

58.7 MB (2.3 MB Compressed download)

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Dimensions:

4174 x 4918 px | 35.3 x 41.6 cm | 13.9 x 16.4 inches | 300dpi

Date taken:

17 January 2006

Photographer:

Nigel Cattlin

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$. Fig. 181.—^ Ergot on Paspalum. After Beal. REDTOP (Agrostis) Black-stem-rust {Puccinia graminis agrostis Erks.). — The rust is identical with that upon wheat and oats, though infection does not readily pass from one host to the other. Smut {Ustilago striceformis (West.) Niessl). — This is the smut described under timothy. It has been known to affect 30 per cent of the plants, and to reduce the seed yield from 300 hundredweight to 70 hundredweight. Anthracnose. See rye. TALL OATGRASS Smut (Ustilago perennans Rostr.). — This smut closely resembles that of oats, though the flower parts are not Stock Photo$

RMMCK9WH–. Fig. 181.—^ Ergot on Paspalum. After Beal. REDTOP (Agrostis) Black-stem-rust {Puccinia graminis agrostis Erks.). — The rust is identical with that upon wheat and oats, though infection does not readily pass from one host to the other. Smut {Ustilago striceformis (West.) Niessl). — This is the smut described under timothy. It has been known to affect 30 per cent of the plants, and to reduce the seed yield from 300 hundredweight to 70 hundredweight. Anthracnose. See rye. TALL OATGRASS Smut (Ustilago perennans Rostr.). — This smut closely resembles that of oats, though the flower parts are not

RMRCDP80–. Diseases of field crops. Plant diseases. 52 California Agricultural Extension Service [Cir. 121 The small, light-red, pustules of crown, or leaf, rust, Puccinia corona fa, which attacks only oats among the cereals, are found mainly on the leaves. They are slow to open and covered with a thin membrane of the plant epidermis. This fungus disease is less destructive than stem rust. In the latter disease, long, dark-red or black pustules of rust spores, P.. Fig. 32.—Leaf-blotch disease of rice. graminis var. avenae (fig. 38, p. 62), break out on the leaves and on the leaf sheaths which enclose t

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Black stem rust Puccinia graminis pustules on wheat stem USA

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