Insects and Spiders - native

Western Cedar Borer (Trachykele blondeli) on Aug 22, 2025

Originally reported as Emerald Ash Borer (Agrilus planipennis)

Submitter does not have a specimen

Description of specimen

Shiny green beetle inside branch of unknown type of tree or bush. Not sure if Emerald Ash Borer.

Commentary

Thank you for your report! This is not EAB. This is Western cedar borer, Trachykele blondelii. They are much larger and less slender than EAB. Their grubs live in dead and dying conifirs, for example, arbor vitae. The hot dry conditions this summer are hard on the trees.

Tom Valente
Aug. 25, 2025, 1:42 a.m.

Resources

Western Cedar Borer information on iNaturalist and a guide to wood boring beetles in Oregon from the Oregon Department of Forestry.

Location

Inside branches in front yard

Expert Reviewer

Tom Valente
Oregon Department of Agriculture

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