Sooty Bark Disease weakens and kills trees. The tree disease has been found in many areas of the Pacific Northwest.
Sooty Bark Disease is caused by the fungus Cryptostroma corticale. This fungal species grows inside the tree and releases spores after causing the outer bark to flake off.
Your help is needed to determine what trees are susceptible to this disease. So far, research has found the fungus on the following species:
- Horse Chestnut
- Bigleaf Maple
- Sycamore Maple
- Norway Maple
- Pacific Dogwood
The disease is likely emerging as an issue now because of recent longer and hotter droughts.