Abstract
Potato virus Y (PVY) causes both foliar and necrotic tuber symptoms in a wide range of varieties. Knowledge of these symptoms in specific varieties will help managers determine the best course of action when plants are infected with PVY. Multiple isolates of PVY from five strains of PVY were used to infect potato varieties. Five market classes were represented and an overall total of sixty-seven potato varieties were used. Visual foliar ratings showed the most severe symptoms were associated with strain PVYO and the mildest symptoms were associated with PVYN:O. Tuber symptoms were not present in the red market class but were present and accounted for 38% of the symptoms in the chip class, 29% in the russet class, and 58% in the specialty/white class. Necrotic tuber symptoms were produced by some isolates in some cultivars in all five PVY strains O, NTN, N:O, Nwi, NE-11.
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