Evaluation of Nematicides and Resistant Cultivar for Control of Soybean Cyst Nematode Race 4. J. M. Epps, Research Nematologist, Agricultural Research Service, U.S. Department of Agriculture, Jackson, TN 38301. L. D. Young, Research Nematologist, Agricultural Research Service, U.S. Department of Agriculture, Jackson, TN 38301, and E. E. Hartwig, Research Agronomist, Agricultural Research Service, U.S. Department of Agriculture, Stoneville, MS 38776. Plant Dis. 65:665-666. Accepted for publication 8 December 1980. 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, 1981. DOI: 10.1094/PD-65-665.

Studies in two fields infested with soybean cyst nematode race 4 compared yields and nematode population levels of a resistant cultivar and susceptible cultivars with and without nematicide treatments. The 3-yr mean yield of the resistant cultivar Bedford was 32% greater than the yields of susceptible cultivars Forrest, Centennial, and Tracy without nematicide treatment and 22% greater than their yields with nematicide treatment. The 3-yr mean yield of Bedford was also 44% greater than that of Forrest without nematicide treatment and 33% greater than the mean yield of Forrest with five nematicide treatments.