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Ecology and Epidemiology

Interaction of Two Potyviruses and Meloidogyne incognita in Chili Pepper. S. R. Koenning, Former graduate student, Department of Plant Pathology, University of Arizona, Tucson 85721, Present address of the senior author: Department of Plant Pathology, North Carolina State University, Raleigh; Michael A. McClure, professor, Department of Plant Pathology, University of Arizona, Tucson 85721. Phytopathology 71:404-408. Accepted for publication 10 September 1980. Copyright 1981 The American Phytopathological Society. DOI: 10.1094/Phyto-71-404.

Reproductive rates of root-knot nematodes (Meloidogyne incognita) were reduced 69% in chili pepper inoculated with tobacco etch virus (TEV) 14 days prior to plant inoculation with nematodes. Inoculation with TEV at 7 days prior, simultaneously, and at 7 and 14 days after nematode inoculation had lesser effects on nematode reproductive rates. Electron microscopic examination of 21-day-old syncytia induced by M. incognita in chili pepper roots revealed viruslike particles of TEV or pepper mottle virus (PeMV-AzD) as well as TEV nuclear inclusions and cylindrical inclusions typical of each virus.

Additional keywords: syncytia, ultrastructure.