Cowpea Wilt Fusarium oxysporum f. sp. tracheiphilum Race 1 from Nigeria. G. M. Armstrong, Department of Plant Pathology, University of Georgia College of Agriculture, Georgia Station, Experiment 30212. J. K. Armstrong, Department of Plant Pathology, University of Georgia College of Agriculture, Georgia Station, Experiment 30212. Plant Dis. 64:954-955. Copyright 1980 American Phytopathological Society. DOI: 10.1094/PD-64-954.

An isolate of the cowpea wilt fungus of unknown race received from Nigeria in 1975 was used along with single-spore isolates of races 1, 2, and 3 of Fusarium oxysporum f. sp. tracheiphilum to inoculate pure lines of cowpea cultivars Groit, Chinese Red, and Arlington, which serve as differentials for determining these races. Cultivars from the germ plasm bank of the International Institute of Tropical Agriculture in Nigeria were also included. Wilt reactions of the cultivars showed that the Nigerian isolate belonged to race 1.