What kind of bug is this? Found several in a downed ash tree I cut up today and more while I was splitting? Any cause for concern?
The frass and feeding galleries in the cambium layer just under the bark are a dead ringer for EAB, but that other boring beetle that went deeper into the tree is something else, equally as bad
Looks like you got it. Hopefully not a problem for the ash trees in my neighborhood. Neighbors have some pretty nice ones. This one came out of a stand of ash trees that I think are reasonably healthy. Gonna do a thread about the score when I get done for the evening