Thousand Cankers - Ask Extension
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,...
Knowledgebase
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
https://pnwhandbooks.org/plantdisease/host-disease/walnut-juglans-spp-thousand-cankers-disease-black-walnut-decline