Hello Bruce,

Based on what I see in your image - this looks like canker or some type of beetle or weevil damage.

PLEASE CONFIRM THIS DIAGNOSIS!! YOU HAVE A COUPLE OF WAYS TO DO THIS

Submit sample branches and attach your three pictures of the tree to the MSU Diagnostic Plant lab. There is a $20-25 dollar fee. Their website has the form and instructions: https://www.canr.msu.edu/pestid/

The lab strongly encourages clients to email digital images prior to bringing or sending physical samples. Images can be sent to <personal data hidden>.

Hire a certified arborist to come on-site and will physically examine the tree. You want an arborist, not just a tree service worker who may not have any schooling in diseases and pests. Find an arborist at: https://www.treesaregood.org/findanarborist/arboristsearch

I recommend hiring the arborist since submitting samples to the lab may not identify insects invading only the trunk as some do, and issues with roots, such as rot, which contribute to decline. The arborist will examine all parts of the trees and give you a plant care plan.

Hope this helps!!