Thank you for your report! Is this an ash tree? Emerald ash borer makes D-shaped holes about 1/8" wide, and attacks only ash trees, white-fringe trees and olive trees. Here is the address of Oregon Department of Agriculture's IPPM Survey and treatment projects EAB page

https://www.oregon.gov/oda/programs/IPPM/SurveyTreatment/Pages/EmeraldAshBorer.aspx

Scroll down to find photos of Emerald Ash Borer Look-Alikes, the EAB Response Plan for Oregon, and more information about how to recognize EAB attack, so that you can monitor your tree.

Tom Valente
Sept. 17, 2024, 2:50 a.m.