Tomato Yellow Leaf Curl
Tomato yellow leaf curl virus (TYLCV)
1 host plant · Viral
Last updated
This profile contains verified disease data from extension databases. Regional field notes and expert review are in progress.
Tomato Yellow Leaf Curl 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
Seedlings and young transplants are most vulnerable to infection and show severe symptom development. Mature plants can be infected but develop less severe symptoms. Plants are vulnerable throughout the growing season when whitefly vectors are active. In Western Washington's maritime climate, vulnerability peaks during warm months (June-September) when whitefly populations are highest. Transplants arriving with whitefly contamination present immediate risk.
Initial symptoms appear 5-15 days post-infection depending on temperature. Young leaves develop chlorosis and slight yellowing along leaf edges. Affected leaves become distorted, curl downward (characteristic 'leaf curl'), and show yellowing starting at the leaf margins. Older leaves yellow less severely than younger leaves. Cool temperatures delay symptom expression; high heat can enhance severity. Symptom intensity depends on virus strain, plant age, and whitefly pressure.
Cultural Controls
- Use whitefly-free, virus-tested seedlings from reputable sources. Inspect transplants for whiteflies and TYLCV symptoms before planting. Scout crops regularly for whiteflies and disease symptoms. Remove and destroy infected plants immediately and completely. Control whiteflies aggressively to prevent virus transmission. Manage weeds that serve as whitefly hosts and virus reservoirs. Maintain plant spacing for air circulation. Use row covers or yellow sticky traps to monitor and trap whiteflies. Avoid overhead irrigation. Resistant cultivars are available for some tomato varieties. Source: PNW Plant Disease Management Handbook; Wikipedia