Abstract
AbstractIn laboratory experiments autoclaved University of California (UC) soil mix containing 5–20 mg of methylmercury dicyandiamide (MMDD)/g of soil was infested with Penicillium notatum. Bioassays were made at intervals up to 63 days later to detect the fungicide's rate of inactivation. The culture of P. notatum had been adapted to grow in the presence of high MMDD concentrations in an agar medium. Relationships among initial MMDD concentration, presence of P. notatum and incidence of damping‐off of peas caused by Pythium ultimum were determined.
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