Oregon officials are warning about the spread of an invasive insect spreading across the Willamette Valley.

An invasive, tree-killing pest has made its way to Portland, spelling trouble for the many ash trees that cool residential neighborhoods on hot summer days. On Wednesday, Oregon forestry officials ...

The emerald ash borer, an invasive species of beetle, has been found in Portland. Local officials say it’s only a matter of time before the pests, which hollow out and kill ash trees, will arrive in ...

State forestry officials have confirmed new detections of the invasive emerald ash borer in three additional Willamette Valley communities, signaling the contin ...

The emerald ash borer, a tiny beetle responsible for killing ash trees across North America, was spotted in three new ...

PORTLAND, Ore. (KOIN) – The dreaded emerald ash borer has made its way into Portland, and it poses a threat to every ash tree in the city. The invasive beetle from East Asia has already had a ...

PORTLAND, Ore. (KOIN) — The tiny green insect known as the most destructive forest pest in North America has been found earlier than usual this year. The invasive emerald ash borer, which first ...

The emerald ash borer has been detected in a parking lot outside Newberg and in Tualatin and Silverton, the Oregon Department ...

KING CITY Ore. (KPTV) - Oregon forestry officials say an unusually warm winter and warm spring have caused larvae of the invasive emerald ash borer to mature and emerge weeks earlier than in previous ...

As Oregon gets hotter and drier due to climate change, tree-killing invasive pests that prefer warmer temperatures are thriving — endangering Sitka spruce along the coast, firs in the mountains and ...