Wheat leaf or brown rust , Puccinia triticina (recondita) infection on a wheat crop in unripe ear

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Contributor:

Nigel Cattlin / Alamy Stock Photo

Image ID:

AJWKGF

File size:

61.8 MB (2.5 MB Compressed download)

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Dimensions:

4692 x 4604 px | 39.7 x 39 cm | 15.6 x 15.3 inches | 300dpi

Date taken:

27 July 2006

Photographer:

Nigel Cattlin

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RM2AJDC85–Elementary botany . Fig. 206.Wheat leaf with redrust, natural size. Fig. 207. Fig. 208. Fig. 209. Fig. 2to. Portion of eaf Natural size. Enlarged. Single darged to show sorus. Figs. 206, 207.—Puccinia graminis, red-rust stage (uredo stage).Figs. 208-210.—Black rust of wheat, showing sori of teleutospores. reddish-brown or reddish pustules, and is known as the redrust (figs. 206, 207). Another form occurs in elongated blackpustules, and this form is the one known as the black rust 187 188 MOKPHOLOG Y. (figs. 208-211). These two forms occur on the stems, blades,etc., of the wheat, also on oats,

RMMA7392–. Elementary botany . I Fig- i45« Fig. 146. Fig. 147. Fig. 148. Fig. 149. Wheat leaf with red Portion of leaf Natural size. Enlarged. Single rust, natural size. enlarged to show sorus. Figs. 145, 146.—Puccinia graminis, red-rust stage (uredo stage). Figs. 147-149.—Black rust of wheat, showing sori of teleutospores. reddish-brown or reddish pustules, and is known as the " red rust" (figs. 145, 146). Another form occurs in elongated black pustules, and this form is the one known as the, "black rust" 129

RMT1HC9B–Diseases of small grain crops Diseases of small grain crops in Illinois diseasesofsmallg35boew Year: 1939 98 ILLINOIS NATURAL HISTORY SURVEY CIRCULAR 35 LEAF RUST Puccinia rubigo-vera, var. Secalis The leaf rust of rye, known also as brown rust, attacks none of the other cereals and has no other hosts among American grasses. It is comparable, among rye diseases, to the leaf rust of wheat, crown rust of oats and leaf rust of barley. Although it has. Fig. 38.—Leaf rust of rye. The pustules shown are the brown, summer-spore pustules, from which are shed the spores that serve to spread the ru

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Wheat leaf or brown rust , Puccinia triticina (recondita) infection on a wheat crop in unripe ear

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