Resource Number: 56352
Title: Forest Disease Management Notes - Phomopsis Canker of Douglas-Fir
Publisher: USDA Forest Service
Resource Type: Fact sheet
Description:
Phomopsis canker of Douglas-fir is caused by the fungus
Diaporthe (Phomopsis) lokoyae. This disease appears
periodically in the Pacific Northwest, typically 1 or 2 years
after droughts. Damage is usually not serious. Infection can
result in cankers, top-killing, and tree killing of small trees.
Last Updated: January 9, 2026
Contributors:
Domain(s)/Area(S):
- Forestry