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Effect of Soil Fumigation on Occurrence and Damage Caused by Soilborne Wheat Mosaic. M. G. Eversmeyer, Research Plant Pathologist, USDA, ARS, Department of Plant Pathology, Kansas State University, Manhattan 66506. W. G. Willis, Professor, Department of Plant Pathology, and C. L. Kramer, Professor, Division of Biology, Kansas State University, Manhattan 66506. Plant Dis. 67:1000-1002. Accepted for publication 16 March 1983. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1983. DOI: 10.1094/PD-67-1000.

Areas of commercial fields showing only light symptoms of soilborne wheat mosaic averaged 6.687.9% increase in yield compared with areas with more severe symptoms in 1975. Soil fumigation of areas of 30 12 m in fields known to be heavily infested with wheat soilborne wheat mosaic virus with 48.8 g/m2 66% methyl bromide and 33% chloropicrin increased wheat yields as much as 1,208% in 19771979. Reestablishment of soilborne wheat mosaic symptoms in fumigated plots is discussed.