Infection of susceptible/tolerant barley genotypes with Barley yellow dwarf virus alters the host plant preference of Rhopalosiphum padi clones depending upon their ability to transmit BYDV

Abstract Discovering mechanisms of plant–virus–vector interactions is fundamental to understand their ecology and evolution apply this knowledge in plant protection. To study the influence varying Barley yellow dwarf virus (BYDV) transmission efficiencies on host preference Rhopalosiphum padi (L.) clones, we performed choice experiments with two barley cultivars (BYDV susceptible cv. ‘Rubina’ BYDV tolerant ‘Vixen’) including healthy virus-infected plants. For cultivar ‘Rubina’, aphid clone R07 (high efficiency) preferred BYDV-infected over plants after 24 h, while clones D10 (medium R09 (low neither host. In contrast, infection ‘Vixen’ did not affect plant’s appeal for R07. Host access, indicated by ingestion observed electrical penetration graph technique a period 2 was facilitated D10, whereas an opposite effect R09. R09, difference visible 5 h. As earlier wheat, enhanced emission volatile organic compounds associated virus-induced attraction detected ‘Rubina.’ It concluded that possibly linked high efficiency as R07, leading fitness advantage early increased ingestion. This present BYDV-tolerant genotypes most likely due absence symptoms.