Invasive beetle known for wiping out ash trees found in Oregon: 'The most destructive and costliest forest pest ever to invade North America'
The insects have killed up to 99% of the ash trees in some North American locations. Years of attack by the invasive beetle species have decimated Connecticut's population of ash trees, for example.
He recognized the holes as a sign of the emerald ash borer and then spotted the beetles. He called the Oregon Department of Forestry and an entomologist and two other invasive species specialists confirmed the invasion. The Oregon Department of Forestry has already collected seeds from Oregon ash trees across the state to try and preserve as much of the tree's genetic diversity as possible. Researchers will test the seeds to see if any have resistance to ash borers and if so, they may be able to breed resistance into local strains and replant them.
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