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Thousand Cankers #823896

Asked March 29, 2023, 6:45 PM EDT

A neighbor thinks the Black Walnut tree in my yard has Thousand Cankers disease. I'm trying to find out how I can verify that it is Thousand Cankers, and if it is, what I should do about it? Thank you.

Lane County Oregon

Expert Response

This link to OSU plant disease gives a very good rundown of the problem. This disease has be found in the Willamette valley. It is worst on poorly drained soils.
https://pnwhandbooks.org/plantdisease/host-disease/walnut-juglans-spp-thousand-cankers-disease-black-walnut-decline
Patricia Patterson Replied March 29, 2023, 10:09 PM EDT

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