Reactions of 16 Cowpea Cultivars to Six Viruses. Mary H. Collins, Former Graduate Research Assistant, Department of Plant Pathology and Physiology, Clemson University, Clemson, SC 29631. W. Witcher, and O. W. Barnett, Department of Plant Pathology and Physiology, and W. L. Ogle, Department of Horticulture, Clemson University, Clemson, SC 29631. Plant Dis. 69:18-20. Accepted for publication 11 September 1984. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/PD-69-18.

Sixteen cowpea cultivars were inoculated with blackeye cowpea mosaic virus (BICMV), cowpea chlorotic mottle virus, cowpea mosaic virus, cowpea severe mosaic virus, southern bean mosaic virus (cowpea strain), and cucumber mosaic virus and rated for susceptibility. The entire study was conducted three times in the greenhouse with five replicates of two plants for each treatment in the first two studies and with four replicates in the third study. Two weeks after inoculation, symptoms were recorded. All plants were rated for susceptibility. Brown Crowder, Magnolia Blackeye, Mississippi Silver, Mississippi Purple, and Worthmore had promising levels of resistance or tolerance to BICMV. Among the cultivars, there appeared to be some resistance or tolerance to the other five viruses.