Oregon ash is one of 16 North American ash species and the only one native to the Pacific Northwest. The trees are most prevalent in the Willamette Valley west of the Cascades and along the ...

There’s a tree killer on the loose in Oregon, and nobody knows how to stop it. An invasive green beetle called the emerald ash borer arrived in the Midwest from Asia, and it’s killed over 100 ...

As native trees in the Pacific Northwest die off due to climate changes, the U.S. Forest Service, Portland, Oregon and citizen groups around Puget Sound are turning to a deceptively simple climate ...

PORTLAND, Ore. — On Friday, the Oregon Department of Forestry launched its annual aerial survey of forests throughout the state, something the agency has done since 1947. Over the next few ...

Oregon saw nearly 2.3M acres of new damage to forests last year, ... There are no long-term drought tolerance solutions for most tree species in the Pacific Northwest, ...

PORTLAND — Forestry officials in Oregon said Monday that an invasive beetle known for decimating ash trees throughout North America and Europe was recently discovered west of Portland.

PORTLAND, Ore. (KOIN) – The Oregon Department of Forestry spent three years collecting more than 900,000 seeds from populations of Oregon ash trees throughout the state. The ODF employees ...

The Douglas fir, the state tree of Oregon, can grow incredibly tall and live impressively long. The oldest Douglas fir trees have lived to be over 1,000 years old.

An invasive insect from Europe and the Middle East is attacking several Oregon white oak trees in the Wilsonville area, and state researchers say it's been found in other pest traps in the past ...

The Oregon Department of Forestry’s booth at the Oregon State Fair featured an aggressive education campaign to raise awareness about emerald ash borer. More than 2,000 stickers, temporary ...

Pine trees are one of the most common coniferous species in North America. ... Oregon, Montana, and California, ... There are about 111 species of pine tree in the genus Pinus, ...