Bud Blight of Soybeans Caused by Cowpea Severe Mosaic Virus in Central Brazil. J. R. N. Anjos, Former Graduate Student, Departamento de Biologia Vegetal, C.P. 153081, Universidade de Brasilia, 70919 Brasilia, DF, Brazil. M. T. Lin, Associate Professor, Departamento de Biologia Vegetal, C.P. 153081, Universidade de Brasilia, 70919 Brasilia, DF, Brazil. Plant Dis. 68:405-407. Accepted for publication 31 October 1983. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-405.

Plants of the soybean cultivar IAC-2 showing symptoms of bud blight in central Brazil were found to be infected by an isolate of cowpea severe mosaic virus (CPSMV) serotype I. The isolate was transmitted by the beetle Cerotoma arcuata but not through seeds of soybean IAC-2. Biological and in vitro properties of the Brazilian isolate were typical of CPSMV. Significant reductions in plant height, grain yield, number of pods per plant, and seed germination occurred in a field trial.