Dear Jonathan, thank you for contacting us. Unfortunately, without good pictures or specimens or looking at the trees in question, it is hard to tell you what is happening. You can start sending us some pictures of the holes you see and pictures of the trees. Please send them to my e-mail: hrogg@oda.state.or.us
Thank you and best regards, Helmuth

Helmuth Rogg
Feb. 25, 2021, 8:38 a.m.