Incidence of Plant-Parasitic Nematodes in the Coastal Plain of North Carolina. D. P. Schmitt, Associate Professor, Department of Plant Pathology, P.O. Box 7616, North Carolina State University, Raleigh 27695-7616. K. R. Barker, Professor, Department of Plant Pathology, P.O. Box 7616, North Carolina State University, Raleigh 27695-7616. Plant Dis. 72:107-110. Accepted for publication 21 September 1987. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/PD-72-0107.

Fields (800) in the coastal plain of North Carolina were systematically selected and sampled. Corn and soybeans were the dominant crops. Nematode genera occurring in about 50% or more of the fields were Criconemella, Helicotylenchus, Meloidogyne, Pratylenchus, and Tylenchorhynchus. Of the Meloidogyne spp. coming from 401 fields, 31% reproduced on NC-95 tobacco (M. arenaria, M. javanica, races 2 and 4 of M. incognita, and M. hapla), 17% reproduced on peanut (M. arenaria race 1 and M. hapla), and 15% reproduced on cotton (races 3 and 4 of M. incognita). Heterodera glycines was present in 25% of the fields sampled. This nematode was detected in 34% of the soybean fields and in 16% of fields planted with nonhosts. Sixty percent of the infested fields contained H. glycines races that could not be managed with resistant cultivars. The specific geographic spatial patterns of nematodes were associated with cropping patterns.

Keyword(s): crop loss, distribution, ecology.