Emerald Ash Borer Hits Oregon | Portland News

Portland News Today | 2 Min News | The Daily News Now! · Aug 7, 2026 · 1m

The emerald ash borer, a deadly invasive beetle first spotted in Michigan two decades ago, has now reached Oregon—making it the first West Coast state to face this forest destroyer. Since its June 2022 discovery in Forest Grove, the pest has spread to four more Willamette Valley counties and confirmed sightings in cities like Beaverton and Salem. With hundreds of millions of ash trees already lost across North America, experts urge residents to spot and report beetles (active June–September), recognize signs like D-shaped holes and thinning leaves, and consider replacing ash trees with…