Insects and Spiders - native

unknown on Aug 29, 2026

Originally reported as Emerald Ash Borer (Agrilus planipennis)

Description of specimen

Submitter does not have a specimen

Oregon ash with significant canopy loss and potential d-shaped exit holes (see images). Lots of the ashes in the park seem to be sick with some infection on the leaf (see images).

Commentary

Avatar of commenter Thank you for your report! That doesn't look like EAB damage. Emerald ash borer makes D-shaped holes about 1/8" wide. Here is the address of Oregon Department of Forestry's EAB website

https://oregon-eab-geo.hub.arcgis.com/pages/identify

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

Tom Valente
Sept. 1, 2026, 10:52 a.m.

Location

Killin Wetlands nature park, along the “Peat Swamp Trail”. An Oregon ash in the Douglas-fir & ponderosa pine upland forest.

Expert Reviewer

Avatar of Reviewer

Tom Valente
Oregon Department of Agriculture

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