Submitted to: American Phytopathological Society Annual Meeting
Publication Type: Abstract Only
Publication Acceptance Date: March 15, 2003
Publication Date: June 1, 2003
Citation: GROVES, R.L., GRAY, S.M. 2003. TIMING OF POTATO VIRUS Y INFECTION AND IMPLICATIONS FOR PATTERNS OF VIRUS MOVEMENT INTO AND AMONG TUBERS. PHYTOPATHOLOGY. 93:S30. Technical Abstract: Potato virus Y (PVY) has reemerged as a serious threat to seed potato production in areas of the northeastern United States. This reemergence may partially be linked to recently introduced, asymptomatic potato varieties where disease incidence is frequently underestimated. Research plots were established in 2001 and 2002 in Newport and Presque Isle, ME to monitor the efficiency of tuber infection among potato varieties Atlantic, Shepody, and Russet Norkotah relative to the timing of PVY infection in the growing season. Early season infections of PVY (pre-bloom developmental stage) resulted in the highest proportion of infected tubers compared to infections which arose during and following the bloom developmental stage. Throughout the growing season, PVY infection of the late-season maturity group Russet Norkotah yielded the highest proportion of infected tubers (80%) followed by medium maturing varieties Shepody (25%) and Atlantic (24%). Knowledge of PVY movement patterns into and distribution within developing potato tubers will aid in the reliability and accuracy of detecting PVY in dormant tubers.