Non-Chemical Management
- Avoid overhead watering. If overhead watering is necessary, water during the morning hours so leaves can dry quickly.
- Space plantings and prune to improve air circulation. Good air circulation limits disease development.
- Prune and destroy diseased leaves and canes. Do not compost diseased material.
- Rake and destroy all fallen leaves from under plants.
- Plant resistant varieties. Your county extension agent or WSU Master Gardeners can make recommendations.
Select non-chemical management options as your first choice!