Effect of Carbofuran on Transmission of Maize Dwarf Mosaic Virus in Sorghum Mechanically and by the Aphid Schizaphis graminum. D. L. Seifers, Plant Pathologist, Fort Hays Branch Experiment Station, Hays, KS 67601, and Department of Entomology, Kansas State University. T. L. Harvey, Entomologist, Fort Hays Branch Experiment Station, Hays, KS 67601, and Department of Entomology, Kansas State University. Plant Dis. 73:61-63. Accepted for publication 11 September 1988. Copyright 1989 The American Phytopathological Society. DOI: 10.1094/PD-73-0061.

Significant (P<0.05) increases in levels of natural infection by maize dwarf mosaic virus (MDMV) occurred in carbofuran-treated sorghum in the field, compared with untreated sorghum. In greenhouse studies, carbofuran-treated sorghum increased infection in aphid (Schizaphis graminum) transmission tests with the A strain of MDMV. In mechanical inoculation tests, virus infection was reduced in carbofuran-treated sorghum by strain A and no difference was observed for strain B.