Emerald Ash Borer Detected in Salem and Beaverton, Prompting Quarantine and Mitigation Efforts
The invasive emerald ash borer has been confirmed in new locations in northwest Oregon, including Salem, Beaverton, and Rockcreek, marking a significant expansion of the beetle's presence in the state. First detected in Oregon in 2022, the beetle has now spread to five counties in the Willamette Valley. A quarantine is in place across these counties, prohibiting the movement of firewood from hardwood trees and parts of ash, olive, or white fringetree. Local municipalities have initiated mitigation efforts. In Salem, nearly 4,000 public ash trees have been inventoried, with the city halting new ash plantings, removing unhealthy trees, and injecting insecticides to protect 1,200 high-value trees. Beaverton has treated 600 of its 2,000 street trees using grant funding. Residents are urged to report sightings to assist in identification. 
