VIEW ARTICLE

Vector Relations

Potato Virus Y Transmission Reduced in an Aphid-Resistant Potato Species. Stephen L. Lapointe, Centro Internacional de Agricultura Tropical (CIAT), Apartado Aéreo 6713, Cali, Colombia (formerly, Department of Entomology, Cornell University, Ithaca, NY 14853); Ward M. Tingey(2), and Thomas A. Zitter(3). (2)Department of Entomology, Cornell University, Ithaca, NY 14853; (3)Department of Plant Pathology, Cornell University, Ithaca, NY 14853. Phytopathology 77:819-822. Accepted for publication 17 October 1986. Copyright 1987 The American Phytopathological Society. DOI: 10.1094/Phyto-77-819.

Transmission of potato virus Y (PVY) by the green peach aphid, Myzus persicae, was examined on an aphid resistant potato species Solanum berthaultii and on susceptible cultivars of S. tuberosum in a series of open field, field cage, and greenhouse studies. In open field trials, PVY incidence at the end of the season was not significantly different for S. berthaultii compared with S. tuberosum ‘Chippewa’ when both species were exposed to aphid-infested source plants of S. tuberosum. However, in field cage trials and in the greenhouse, S. tuberosum experienced less PVY infection when exposed to a source plant of S. berthaultii compared with S. tuberosum exposed to a source plant of S. tuberosum. Both source plant and target plant had a significant effect on PVY spread in field cages. The influence of the PVY-infected source plant was consistently greater than the effect of target plant on PVY spread.