Insects and Spiders - non-native

Bronze Birch Borer (Agrilus anxius) on Sep 22, 2018

Submitter does not have a specimen

Description of specimen

Exit holes in trees and die back.

Commentary

Without pictures of the insect or damage to trees, this one is hard to diagnosis 100%, but it certainly sounds like bronze birch borer. This is an insect that is native to Oregon but that causes a lot of problems on planted birch. Here are a few good resources for landowners:
https://catalog.extension.oregonstate.edu/em9191
https://catalog.extension.oregonstate.edu/sites/catalog/files/project/pdf/em9189.pdf

Wyatt Williams
Oct. 1, 2018, 5:09 a.m.

Location

Bronze Birch Bore and Cypress Beetle. Loss of paper birch trees, several large cypress trees planted last year on property have die back and sap leakage all over.

Expert Reviewer

Wyatt Williams, Ph.D.
Wyatt Williams, Ph.D.

Invasive Species Specialist

Oregon Department of Forestry

Private Forests Division

2600 State St. Bldg. D

Salem, OR 97310-0340



Office: 503-945-7472

wyatt.williams@oregon.gov

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