Resource Number: 55157
Title: Annosum Root Rot
Publisher: USDA Forest Service
Resource Type: Fact sheet
Description:
Annosum root rot is an important disease of conifers in temperate regions worldwide. Caused by Heterobasidion annosum (formerly Fomes annosus), it can lead to root rot, butt rot, reduced growth, and even tree mortality. The occurrence of this disease increases substantially after partial cuts in conifer stands, especially when environmental conditions favor its development.
Last Updated: December 2, 2025
Contributors:
Domain(s)/Area(S):
- Forestry
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