. Diseases of economic plants. Plant diseases. FOBAGE CBOPS 389 in the early spring, upon many other varieties; but the uredo stage soon gains the ascendancy over it. All three forms may be produced side by side, to some extent, throughout the summer. Hibernation prol^ably occurs in two ways, by the teleu- tospores and by the mycehum, which may remain alive in the affected parts over winter. Anthracnose (CoUetotrichum Trifolii Bain). — This anthrac- nose is now known in Ten- nessee, Ohio, West Virginia, Arkansas, Kentucky, and Dela- ware. It is first found chiefly upon the leaf stalks, later u
. Diseases of economic plants. Plant diseases. FOBAGE CBOPS 389 in the early spring, upon many other varieties; but the uredo stage soon gains the ascendancy over it. All three forms may be produced side by side, to some extent, throughout the summer. Hibernation prol^ably occurs in two ways, by the teleu- tospores and by the mycehum, which may remain alive in the affected parts over winter. Anthracnose (CoUetotrichum Trifolii Bain). — This anthrac- nose is now known in Ten- nessee, Ohio, West Virginia, Arkansas, Kentucky, and Dela- ware. It is first found chiefly upon the leaf stalks, later upon the stems, near the surface of the ground and just below the flower clusters, as elongated sunken spots, which result eventually in the death of the whole plant. It frequently causes great loss, and is said by Bain to be the most serious plant disease in Tennessee. The same disease occurs upon alfalfa, but alsike clover is nearly immune. The greatest hope lies in the breeding of resistant varieties. Anthracnose (Gloeosporium caulivorum Kirchner).— Long, brown to black, sunken spots upon stems and petioles, causing death of the more distal parts, are cUagnostic characters of this anthracnose, which was first reported in. Fig. 167. — Anthraonose on red clover stem and petiole. After 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 Stevens, Frank Lincoln, 1871-1934; Hall, John Galentine, 1870-. New York, Macmillan
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