Potato Virus Y (PVY)

Pathogen: Potato Virus Y (PVY)

Symptoms

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Shortening of the stem internodes, spotting and severe malformation of the upper leaves, defoliation, and early plant death.

Damage

Yield reduction. Affected tubers are unusable for propagation.

Conditions for Development

The virus is transmitted by affected tubers, and is dispersed by aphids from infested plants (potato and other solanaceae spp.); it is also spread by contact. The most severe symptoms result from a combination of PVX and PVY (streak).

Control

Varieties: Use of resistant and tolerant cultivars.

Pesticides: Control of aphids, high-pressure spraying of oils.

Management: Use of disease-free seed tubers, and burning infested plants.

Aerial Stem Rot
Black Dot, Colletotrichum coccodes
Blackleg and Tuber Soft Rot
Black Scurf, Rhizoctonia Canker
Common Scab, Streptomyces scabies
Early Blight, Alternaria solani
Deep Pitted Scab, Streptomyces spp
Leak, Pythium ultimum
PLRV, Potato Leafroll Virus
Powdery Scab, Spongospora subterranea
PVX, Potato Virus X
PVY, Potato Virus Y
Verticillium Wilt, Verticillium dahliae