If you're seeing lots of tiny holes on your tree's bark, you could be dealing with a major pest infestation. Find out which ...

The emerald ash borer, a tiny yet destructive invasive beetle, has been confirmed at six new locations in northern Oregon.

With their wide-spreading, leafy branches, ash trees are quite popular in the U.S., but they're being seriously threatened by ...

The discovery puts all of Multnomah County into a quarantine zone. It’s the fifth county to be quarantined in Oregon.