. Annual report of the Commissioner of Agriculture ... Agriculture -- New York (State). DISEASES OF ALFALFA AND CLOVER Charles Gregory, Ithaca, N. Y, Assistant Professor of Plant Pathology, Cornell University. LEAF SPOT (See introductory paragraph under diseases of timothy, page 2757.) Leaf spot, Pseudopeziza medicaginis (Lib.) Sacc, is always found on alfalfa and clover leaves, and sometimes on the stem. It is particularly severe during rather dry seasons. On alfalfa there are pro- duced small yellow spots, which, if abundant, will cause dropping of the leaves. The new leaves may become infec
. Annual report of the Commissioner of Agriculture ... Agriculture -- New York (State). DISEASES OF ALFALFA AND CLOVER Charles Gregory, Ithaca, N. Y, Assistant Professor of Plant Pathology, Cornell University. LEAF SPOT (See introductory paragraph under diseases of timothy, page 2757.) Leaf spot, Pseudopeziza medicaginis (Lib.) Sacc, is always found on alfalfa and clover leaves, and sometimes on the stem. It is particularly severe during rather dry seasons. On alfalfa there are pro- duced small yellow spots, which, if abundant, will cause dropping of the leaves. The new leaves may become infected as they develop and each new period of infection results in new spots on all leaves. Hence the older, lower leaves are most severely diseased and are first to drop. The abundant up- per foliage will mask the diseased condition of the lower leaves unless the trouble is particularly severe. On clover, the spots are large and brown. It may cause drying and withering of the leaves and petioles, but the leaves do not fall from the plant as in alfalfa. The disease is not so serious on olover. There is no practicable control method. The only thing to be done is to cut the crop before the disease becomes too severe and thus save as many of the leaves as possible. [718]. \ Fig. The Leaf FALFA. Spot on Al-. 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 New York (State). Dept. of Agriculture; New York State Agricultural Experiment Station; Cornell University. Agricultural Experiment Station. Albany : State of New York, Dept. of Agriculture
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