Description

Abstract: 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 PStVI 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.