Is our Black Walnut Tree Dying?

Asked July 8, 2018, 7:59 PM EDT

For some reason this year our Black Walnut Tree did not leaf in several areas....

There are some leaves on the bottom, but not on the upper branches.

Is it insects? Maybe needs to be pruned? Not sure why?

Thank you,
Paul & Lisa

Northampton County Pennsylvania

1 Response

I advise having your black walnut tree examined by a certified arborist. A new fungal disease has been attacking and killing black walnut trees in Pennsylvanian counties adjacent to Northampton. The disease is thousand cankers disease and is spread by the walnut twig beetle. Here's a link to an excellent article about the disease:

To locate a certified arborist, I recommend using the International Society of Arborculture's web site tool:


Most arborists offer a free consultation visit. If the arborist believes that your walnut tree is infected with thousand cankers disease, it should be reported to your local county extension office:


Thanks for contacting us. I hope that you are able to find an arborist in your area soon!