Non-Chemical Management
- Use resistant rootstocks. Mazzard rootstocks are reported to be moderately resistant after they are well established.
- Provide proper culture. Healthy plants are more resistant to infection.
- Remove damaged trees if necessary. When possible, remove roots 1" or more in diameter and air-dry soil before replanting.
- Avoid injury to roots and trunk.
- Plant resistant species in infected areas. Lists are available in the PNW Plant Disease Management Handbook and the Sunset Western Garden Book, or contact your county Extension agent or WSU Master Gardeners.
Select non-chemical management options as your first choice!