Potato Virus Y
Potato virus Y (PVY)
1 host plant · Viral
Last updated
This profile contains verified disease data from extension databases. Regional field notes and expert review are in progress.
Potato Virus Y can show up on landscape plants, producing visible damage that ranges from leaf spots and discoloration to branch dieback depending on severity. Early detection gives you the best management options.
Start with sanitation: remove and dispose of affected material as you find it. Thin dense growth to improve air circulation, and redirect irrigation away from foliage. If the condition persists despite cultural adjustments, your local Extension office can help identify the pathogen and recommend targeted treatments.
Quick Reference
Management
Growing season, especially early stages when plants are young and most susceptible to aphid feeding. Peak vector activity occurs spring through summer. Risk highest at planting (from infected seed) and during early plant growth.
Aphid vector activity is the primary activation factor. Warmer spring and summer temperatures increase aphid populations and feeding activity. Virus replication accelerates with moderate to warm temperatures (optimal ~20-25°C).
Cultural Controls
- Plant only certified virus-free seed potatoes Seed potato certification standards, PNW Plant Disease Management Handbook
- Rogue infected plants early and frequently during growing season IPM standards
- Control aphid vectors with insecticides or reflective mulch Integrated pest management guidelines
- Avoid replanting seed potatoes from same line for multiple consecutive generations Extension guidelines
- Isolate potato plantings from cull piles and other sources of infected tubers Field sanitation practices