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Etiology

Seed Transmission of Bean Common Mosaic Virus in Phasemy Bean. R. Provvidenti, Senior Research Associate, Department of Plant Pathology, Cornell University, New York State Agricultural Experiment Station, Geneva 14456; S. W. Braverman, Research Plant Pathologist, Agricultural Research Service, U.S. Department of Agriculture, Cornell University, New York State Agricultural Experiment Station, Geneva 14456. Phytopathology 66:1274-1275. Accepted for publication 12 May 1976. Copyright © 1976 The American Phytopathological Society, 3340 Pilot Knob Road, St. Paul, MN 55121. All rights reserved.. DOI: 10.1094/Phyto-66-1274.

Bean common mosaic virus (BCMV) was seed-transmitted in five of 26 accessions of phasemy bean (Macroptilium lathyroides). The rate of transmission ranged from 5 to 33%, with the higher percentage from progenies of plants derived from infected seeds. The virus was localized in the embryos but not in the testae. None of the 26 accessions was resistant to two isolates of BCMV from bean (Phaseolus vulgaris) and one from phasemy bean. However, resistance to BCMV was found in six accessions of a related species, M. atropurpureum, commonly known as siratro.