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Disease Note First Report of Wheat Soilborne Mosaic Virus in Texas. R. W. Toler, Department of Plant Pathology and Microbiology. Texas A&M University. College Station 77843. K. L. McCoy, G. W. Philley, and
L. W. Barnes, Texas Agricultural Extension Service. Dallas, Overton, and College Station, respectively. Plant Dis. 68:1016. Accepted for publication 30 July 1984. Copyright 1984 The American Phytopathological Society. DOI: 10.1094/PD-68-1016b. Wheat soilborne mosaic virus (WSBMV) was found in Grapson, Hunt, and Lamar counties in wheat (Triricum aestivurn L.) cultivars NK-8 12. TAM 106, and Coker797 in February 1984. Katurally infected wheat plants showed chlorosis, mottling, and rosette symptoms typical of WSBMV. Disease incidence averaged 5% and severe stunting was observed. In gel double-diffusion serology tests. the virus reacted positively with WSBMV antiserum supplied by M. K. Brakke, University of Nebraska. Two lengths of rigid, rod-shaped particles typical of WSBMV were observed in Quick-Dips and sectioned leaf tissue; mean lengths of the rods were 145 and 339 nm, and mean width was 20 nm. This is the first report of WSBMV in Texas. |