Non-Chemical Management
- Plant disease-tolerant or disease-resistant varieties. (See list in PNW Disease Management Handbook.)
- Watch for signs of infection during appropriate weather conditions.
- Pick off infected leaves to prevent spread of disease.
- Gather and destroy all fallen leaves.
- Prune out and destroy infected canes at end of season to prevent overwintering of disease.
- Space plantings and prune to provide good air circulation.
- Avoid overfertilizing, which encourages susceptible new growth. If necessary, switch to a slow-release or lower-nitrogen formula.
Select non-chemical management options as your first choice!