Unhealthy Maples Tacoma Street

Sooty Bark Disease Vulnerability

Sooty Bark Disease

Sooty bark disease is an emerging issue for urban forests in the Northwest. Many maple tree species are susceptible. Understanding the impacts of this disease is importance because maple trees account for nearly 25% of our urban forests.


Our lab provides diagnostics for sooty bark disease. Learn more about sooty bark disease and find instructions for submitting a sample or feel free to contact us.

Tacoma Study

We received a Washington State Department of Natural Resource Community Forestry Assistance Grant to engage communities and survey maple trees across Tacoma in 2022.

Our team visited 140 randomly selected blocks throughout Tacoma and surveyed the health of nearly 1000 maple trees. A blog post about the study was recently featured by the Tacoma Tree Foundation.

Sooty bark disease red maple