ABSTRACT
Because aphids are important virus vectors in potato (Solanum tuberosum L.) crops, studies on aphid-plant-virus interactions are necessary for establishment of proper management strategies. This research was carried out to study transmission of Potato virus Y (PVY) strains to potato cultivars and to characterize the transmission resistance on these cultivars. Five cultivars (Ágata, Jaette Bintje, Mondial, Monalisa and Santè) were tested regarding their resistance to PVY transmission. In a preliminary test with a susceptible cultivar (Desirée), M. persicae was more efficient than Aphis gossypii Glover as a vector of these strains. Virus isolates belonging to strains PVYO, PVYN and PVYNTN were transmitted efficiently by M. persicae at variable rates depending on the potato cultivar, indicating various resistance levels among the cultivars tested. The cultivar Santè was resistant to all the strains tested, whereas the others were either susceptible or moderately resistant.
KEY WORDS:
Potato virus Y; Myzus persicae; potato; cultivars; resistance.