Sources of Resistance to Peanut Mottle Virus in Arachis Germ Plasm. H. A. Melouk, USDA, Agricultural Research Service, Departments of Plant Pathology, Botany and Microbiology, and Agronomy, Oklahoma State University, Stillwater 74078. M. R. Sanborn, and D. J. Banks, USDA, Agricultural Research Service, Departments of Plant Pathology, Botany and Microbiology, and Agronomy, Oklahoma State University, Stillwater 74078. Plant Dis. 68:563-564. Accepted for publication 30 March 1984. 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, 1984. DOI: 10.1094/PD-68-563.

The following peanut accessions were not susceptible to peanut mottle virus (PMV) as determined by the absence of local lesions on inoculated plants of the bean cultivar Topcrop: Rhizomatosae section PI 468171, PI 468174, PI 468363, PI 468366, and PI 468371; Arachis section PI 468141 and PI 468142 (both A. diogoi); and PI 468169 (Arachis sp.). Leaves on shoots of these peanut entries and of the susceptible cultivar Tamnut 74 were mechanically inoculated with a severe PMV strain. Leaves from each shoot were tested for virus infection 3–4 wk after inoculation. All entries were negative for the virus on the basis of symptoms, local-lesion assays on Topcrop bean, serology, and electron microscopy. The control Tamnut 74 shoots were infected in each case. This is the first report of PMV resistance in any species within the Arachis section.