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Disease Note First Report of a Potyvirus Infecting Wisteria floribunda in the United States. R. S. Halliwell, Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843. M. R. Porterfield. Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843. Plant Dis. 68:450. Accepted for publication 30 January 1984. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-450d. A potyvirus infecting numerous Wisteria floribunda DC. plants in a Texas nursery was suspected of being wisteria vein mosaic virus (WVMV). Symptoms were typical of those described for WVM originally reported in Italy in 1969 and in the Netherlands in 1970. The virus was mechanically transmitted to W. floribunda, Chenopodium amaranticolor Coste & Reyn., Nicotiana tabacum L., and Phaseolus vulgaris L. 'Pinto.' Flexuous, rod-shaped particles with an average length of 740 nm were found in leaf dip preparations from infected wisteria. WVM antigen did not react with antisera specific for tobacco etch virus, potato virus Y, or watermelon mosaic viruses 1 and 2 in immunospecific electron microscopy. |