Knowledgebase

Walnut tree blight? #459186

Asked June 03, 2018, 1:49 PM EDT

Hi, in the last 3 weeks we’ve noticed these hard spots on our walnut tree leaves. See photos attached. Should this be a concern? If yes, what is the recommended response? Thank you.

Lane County Oregon

Expert Response

Thanks for the photos! That looks like the work of the walnut blister mite, which you can read about here...

https://pnwhandbooks.org/insect/nut/walnut/walnut-walnut-blister-mite

Generally no control is warranted.
The Question Asker Replied June 04, 2018, 3:37 PM EDT

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