. Distinguishing characteristics of some forage-grass diseases prevalent in the North Central states. Forage plants Diseases and pests Middle West; Grasses Diseases and pests Middle West. CHARACTERISTICS OF SOME FORAGE-GRASS DISEASES 13 Leaf Blight Leaf blight, caused by Helminthos- perium turcicum Pass., is a serious fungus disease of corn and sorghum in some areas of the United States and is destructive on Sudan grass in the North Central region. As its name implies, symptoms are a con- spicuous blighted or scalded appearance of the foliage (fig. 14). Within a period of a few days an entire
. Distinguishing characteristics of some forage-grass diseases prevalent in the North Central states. Forage plants Diseases and pests Middle West; Grasses Diseases and pests Middle West. CHARACTERISTICS OF SOME FORAGE-GRASS DISEASES 13 Leaf Blight Leaf blight, caused by Helminthos- perium turcicum Pass., is a serious fungus disease of corn and sorghum in some areas of the United States and is destructive on Sudan grass in the North Central region. As its name implies, symptoms are a con- spicuous blighted or scalded appearance of the foliage (fig. 14). Within a period of a few days an entire field of Sudan grass may develop extreme blighting and appear characteristically burned or frosted. Coni- dia of the fungus are produced in abun- dance on the lesions. Conidia are dark, slightly thickened, with one to eight septations, and have a distinctly protrud- ing hilum at the basal end. Blight first appears about midsummer and continues until plant maturity. Disease develop- ment is favored by periods of warm, moist Figure 14.— Leaf blight on Sudan 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 Allison, J. Lewis (Joseph Lewis), 1911-; Chamberlain, Donald W. (Donald William), 1905-. Washington, D. C. : U. S. Dept. of Agriculture
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