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

The emerald ash borer has been detected in Portland, Oregon, and the Oregon Department of Forestry is urging residents to ...

Portland’s tree canopy will not look the same over the next decade. For many residents, the first signs of the emerald ash borer’s invasion will appear along the city's streets.

It’s official. The emerald ash borer, a half-inch-long metallic-green beetle, has arrived in Portland. Portland Parks and Recreation‘s Urban Forestry division recently released a plan to manage the ...

PORTLAND, Ore. (KOIN) – Portland is bracing for yet another threat to the city’s greenery. The emerald ash borer, a half-inch-long metallic-green beetle, is expected to arrive in Portland soon. More ...

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 ...

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Emerald ash borer, native to eastern Asia, was first found in the U.S. in Michigan in 2002. Since then, it’s killed millions of ash trees across the eastern U.S. The invasive beetle was first detected ...

Two new pests in the Willamette Valley could decimate trees and worsen the ‘urban heat island’ effect that makes some neighborhoods hotter than others For years, Portland area politicians have ...

The Oregon Department of Forestry discovered an emerald ash borer in a tree in the parking lot at the David Douglas Aquatics Center in the Hazelwood neighborhood deep in Northeast Portland. Peter Van ...