Is this black walnut dying?

Asked June 18, 2015, 10:49 AM EDT

The tree canopy seems very sparse for the time of year. Other black walnuts in neighborhood look fine. Maybe I should have it taken out instead of having dead branches removed. Can I be sure it isn't thousand cankers disease?

Olmsted County Minnesota black walnut tree thousand cankers disease

2 Responses

The dying branches and large crack in the main trunk indicate that the tree is structurally unstable and otherwise under stress. We believe it's prudent to ask a forester or certified arborist to assess the tree's health and suggest a course of action.

So far thousand cankers disease has not been detected in Minnesota. A forester or certified arborist is qualified to identify or rule out the presence of this disease.

Go to the following websites to learn more about it:


Thanks, Bob!