Alfalfa is turning green early in this warmer-than-usual spring and the frequent rains have promoted foliar diseases in parts of Iowa. Last week, ISU extension field specialists-crops Brian Lang (northeast) and Virgil Schmitt (east) reported spring black stem, and Mark Carlton (south central) reported Leptosphaerulina leaf spot.
Iowa State University
Yang, X. B. and Munkvold, Gary P., "Alfalfa leaf diseases reported" (1998). Integrated Crop Management News. 2252.
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