Walnut leaf edges curling in

Asked May 12, 2019, 12:40 PM EDT

We have a couple walnuts in pots ready to be planted that we purchased from a nursery. The edges of the leaves are starting to curl in and some have black edges. I looked up walnut diseases online but don’t find anything that looks like this. Thank you

Yamhill County Oregon walnut trees

1 Response

Thank you for your question. Although an examination under a microscope would be necessary to confirm it, I suspect your trees have walnut blight, described in this article: https://s3.wp.wsu.edu/uploads/sites/2071/2013/12/Disease-Problems-in-Walnuts.pdf

I suggest you take some affected leaves to your county Extension office, where staff can examine them to confirm or not. Here is their webpage: https://extension.oregonstate.edu/yamhill

Good luck!