Disease Note

Tobacco Streak Virus in Soybean in Oklahoma. J. L. Sherwood and K. E. Jackson, Plant Pathology Department, Oklahoma State University, Stillwater 74078. Plant Disease 69:727, 1985. Accepted for publication 9 April 1985. Copyright 1985 The American Phytopathological Society. DOI: 10.1094/PD-69-727b.

At the end of the growing season in 1983 and 1984, some soybean (Glycine max (L.) Merr.) fields in eastern Oklahoma had plants that remained green with unexpanded, unfilled pods.  Affected plants of the cultivar Forrest were found in Muskogee County in 1983 and affected plants of an unknown cultivar were found in Sequoyah County in 1984.  In Ouchterlony double-diffusion tests, antiserum to tobacco streak virus (TSV) strain HF (provided by R. W. Fulton of the University of Wisconsin-Madison) reacted positively with leaf and pod tissue from affected plants but not with tissue from unaffected plants.  Antisera to tobacco ringspot, bean pod mottle, and soybean mosaic viruses (the latter two provided by H. A. Scott of the University of Arkansas) did not react.  Although TSV has been reported in Iowa, this is the first report of the virus in soybean in Oklahoma.

Reference: Fagbenle, H. H., and Ford, R. E. Phytopathology 60:814, 1970.