Reaction of Soybean Cultivars to 14 Races of Phytophthora megasperma f. sp. glycinea. C. K. Moots, Graduate Research Assistant, Department of Agronomy, University of Illinois, and USDA, ARS, Urbana 61801. C. D. Nickell, Associate Professor, Department of Agronomy, and L. E. Gray and S. M. Lim, Associate Professors and Research Plant Pathologists, Department of Plant Pathology, University of Illinois, and USDA, ARS, Urbana 61801. Plant Dis. 67:764-767. Accepted for publication 6 December 1982. 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, 1983. DOI: 10.1094/PD-67-764.

Soybean cultivars (Glycine max) were screened for reaction to 14 races of Phytophthora megasperma f. sp. glycinea. Eighty-five cultivars were found susceptible to all 14 races, whereas 37 were resistant to one or more races. Many plant-pathogen interactions resulted in reactions that were intermediate and could not be classified as either susceptible or resistant to P. megasperma f. sp. glycinea.