White Mold of Beans in Idaho caused by Sclerotinia sclerotiorum
BUL-1122
BY Christian Joseph R. Cumagun, Carlos Pizolotto, Mackade Murdock, James Woodhall
December 1, 2025
White mold is one of the most serious and destructive diseases of beans in Idaho. Given that yield losses can exceed 30% and in severe cases take out an entire crop, preventing the spread of the soilborne fungus that causes it is crucial for Idaho producers. Learn about its fungal pathogen plus the signs and symptoms, disease cycle, and management techniques for this potentially devastating pestilence in this five-page, richly illustrated bulletin. Management strategies include cultural and chemical controls and growing resistant cultivars. A handy table listing updated fungicide recommendations will help you to navigate the most effective chemical strategy for your situation.