Transmission of Peanut Mottle and Peanut Stripe Viruses by Aphis craccivora and Myzus persicae. P. Sreenivasulu, Visiting Professor, The University of Georgia College of Agriculture, Department of Plant Pathology, Georgia Experiment Station, Experiment 30212. J. W. Demski, Professor, The University of Georgia College of Agriculture, Department of Plant Pathology, Georgia Experiment Station, Experiment 30212. Plant Dis. 72:722-723. Accepted for publication 20 March 1988. Copyright 1988 The American Phytopathological Society. DOI: 10.1094/PD-72-0722.

From singly infected peanut plants, Myzus persicae was more efficient in transmitting peanut stripe virus (PStV) (29%) and peanut mottle virus (PMV) (14%) than Aphis craccivora (17 and 4%, respectively). Peanut stripe virus was transmitted more efficiently (16%) than PMV (9%) by M. persicae from PStV/PMV doubly infected plants. Aphis craccivora also tramsmitted PStV more efficiently (7%) than PMV (3%) from doubly infected plants. In sequential feeding trials (aphid fed first on a PMV-infected leaf and then on a PStV-infected leaf, and vice versa), PStV was transmitted to healthy peanut plants at a higher percentage than PMV, regardless of the sequence of feeding. Peanut stripe virus transmission was enhanced to 35% with A. craccivora and 45% with M. persicae when the aphid vectors fed on PMV-infected plants before feeding on PStV source plants. Simultaneous transmission of both viruses by a single aphid from doubly infected plants or sequential feeding trials did not occur with A. craccivora and at 3% or less for M. persicae.