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Occurrence and Host Range of a New Root-Knot Nematode (Meloidogyne chitwoodi) in the Pacific Northwest. G. S. Santo, Associate Professor of Nematology, Washington State University, Prosser, WA 99350. J. H. O’Bannon, Nematologist, USDA, SEA, AR, Irrigated Agriculture Research and Extension Center, Prosser, WA 99350; A. M. Finley, Professor of Plant Pathology, University of Idaho, Moscow 83843; and A. M. Golden, Nematologist, USDA, SEA, AR, Nematology Laboratory, Beltsville, MD 20705. Plant Dis. 64:951-952. 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, 1980. DOI: 10.1094/PD-64-951.

A new root-knot nematode (Meloidogyne chitwoodi) has been associated with potato, wheat, and corn in Washington, Idaho, and Oregon. A host range study showed that this nematode reproduces on potato, tomato, sugar beet, wheat, and corn. This is significant because wheat and corn are commonly grown in rotation with potatoes and sugar beets to reduce Meloidogyne hapla populations. Symptoms produced on tubers are similar to those produced by M. hapla. However, on potato and Red Cherry and Rutger tomato roots, M. chitwoodi causes no or only slight galling.