Breeding Productive Soybean Cultivars Resistant to the Soybean Cyst Nematode for the Southern United States. Edgar E. Hartwig, AR-SEA, U.S. Department of Agriculture, Stoneville, MS. Plant Dis. 65:303. . 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. DOI: 10.1094/PD-65-303.