SUGAR BEET NEMATODE F. A. Gray, G. D. Francl, F- D. Kerr2 1 Professor, and Assistant Professor /Extension Plant Pathologist respectively, Department of Plant, Soil, and Insect Sciences, College of Agriculture, University of Wyoming. 2 Professor/Extension Plant Pathologist, University of Nebraska. The sugar beet nematode, Heterodera schachtii is a major parasite of sugar beets. It causes serious ...