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Strains of Peanut Mottle Virus. O. R. Paguio, Department of Plant Pathology and Plant Genetics, University of Georgia, Athens 30602; C. W. Kuhn, Department of Plant Pathology and Plant Genetics, University of Georgia, Athens 30602. Phytopathology 63:976-980. Accepted for publication 12 February 1973. DOI: 10.1094/Phyto-63-976.

Five virus isolates from peanut were identified as strains of peanut mottle virus. Relatedness was determined by similarities in particle morphology, serological reactions, ultraviolet absorbancy, host range, and properties in crude juice; mild strains cross-protected against the severe ones. Strains M1 and M2 induced mild mottle in peanut, whereas N, S, and CLP caused necrosis, severe mosaic, and chlorotic line pattern symptoms, respectively, Strains M1 and M2 were differentiated by three criteria: (i) symptoms on pea, (ii) incubation period in pea, and (iii) size of local lesions on bean. Other differences among the strains were local lesion size and virus production in peanut and pea.