Control of Sclerotinia Blight of Peanut with Procymidone. D. M. Porter, Plant Pathologist, Agricultural Research, Science and Education Administration, U.S. Department of Agriculture, Tidewater Research and Continuing Education Center, Suffolk, VA 23437. Plant Dis. 64:865-867. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1980. DOI: 10.1094/PD-64-865.

Mycelial growth of Sclerotinia minor Jagger was minimal on potato-dextrose agar containing procymidone at 0.25 µg/ml after 288 hr of incubation and was completely inhibited on agar containing procymidone at 4 µg/ml. Procymidone (four applications of 0.56 kg a.i./ha) applied directly to peanut foliage almost completely controlled Sclerotinia blight in fields where the disease was severe in untreated plots. Peanut pod yield and value in procymidone-treated plots were almost twice those obtained in the untreated control plots. S. minor was not isolated from seed from plants treated with procymidone, and sclerotial populations of S. minor were several times greater in soil from untreated control plots than in soil from procymidone-treated plots.

Keyword(s): chemical control, fungicides, Sclerotinia sclerotiorum, soilborne fungus.