Invasive beetle arrives in eastern Washington, threatens ash trees

By: Aspen Ford

Outlets: Washington State Standard

Published: October 16, 2026

Words: 491

Last Updated: 1 day, 3 hours ago


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The emerald ash borer, one of the most destructive invasive pests in the nation, has been detected in multiple trees outside of Walla Walla in eastern Washington .

Late last month, an arborist arrived at a home in College Place, a community southwest of Walla Walla. On an ash tree already in decline, the arborist found signs of a beetle infestation and reported it to the state officials who then sent samples to …

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