A New Race of Fusarium oxysporum f. sp. conglutinans That Attacks Cabbage with Type A Resistance. J. Ramirez- Villupadua, Graduate Research Assistant, Department of Plant Pathology, University of California, Riverside 92521. R. M. Endo, Professor, Department of Plant Pathology, University of California, Riverside 92521; P. Bosland, Graduate Research Assistant, and P. H. Williams, Professor, Department of Plant Pathology, University of Wisconsin, Madison 53706. Plant Dis. 69:612-613. Accepted for publication 27 March 1985. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/PD-69-612.

An isolate of Fusarium oxysporum f. sp. conglutinans from cabbage (Brassica oleracea var. capitata cv. Headstart), grown in California, was determined to be a new pathotype on the basis of pathogenicity to a series of differential hosts. The new pathotype, designated race 5, was determined capable of overcoming the monogenic dominant type A resistance commonly found in resistant cabbage cultivars.