Insects and Spiders - native

unknown on Sep 15, 2024

Originally reported as Emerald Ash Borer (Agrilus planipennis)

Submitter does not have a specimen

Description of specimen

Have not found an actual insect - our ash tree though is having some of the same symptoms as what appears from the ash borers. Not sure if that is what’s causing it, but wanted to report just in case.

Commentary

Thank you for your report! Emerald ash borer makes D-shaped holes about 1/8" wide. You may be able to see S-shaped galleries inside those bark splits. A tree with bark splits like that would likely also show noticeable canopy thinning if EAB were the cause. 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, 2:53 a.m.

Location

Haven’t found an actual insect, but our ash tree is showing some similar signs as the ones I see in the emerald ash borer brochure. The ash tree is in the parking strip in front of our house, and started showing these sign about a year ago

Expert Reviewer

Tom Valente
Oregon Department of Agriculture

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