The Effects of Bean Leafroll Virus on Life History Traits and Host Selection Behavior of Specialized Pea Aphid (Acyrthosiphon pisum, Hemiptera: Aphididae) Genotypes.

摘要: Intraspecific specialization by insect herbivores on different host plant species contributes to the formation of genetically distinct “host races,” but effects virus infection interactions between specialized and their plants have barely been investigated. Using three phenotypically divergent pea aphid clones ( Acyrthosiphon pisum L.) adapted either Pisum sativum or alfalfa Medicago sativa L.), we tested how these hosts an insect-borne phytovirus Bean leafroll ; BLRV) affects performance preference. Four important findings emerged: 1) mean survival rate intrinsic population growth Rm ) were increased 15% 14%, respectively, for aphids feeding infected with BLRV; 2) 34% variance in was attributable clone × host interactions; 3) a three-way species × virus treatment significantly affected rates growth; 4) each clone exhibited preference when choosing noninfected plants, two preferences modestly reduced selecting among virus-infected plants. Our studies show that colonizing BLRV-infected A. growth, confirming benefits pisum. BLRV transmission discrimination genotype-specific fashion, detected unique “virus-association phenotypes,” potential consequences patterns use populations crop epidemiology.