Add Yahoo as a preferred source to see more of our stories on Google. Drought and insects have killed an unprecedented number of Oregon's Douglas fir trees during the last decade, costing billions in ...

COEUR D'ALENE, Idaho -- If you want to impress your friends with your tree knowledge on your next hike, check out the upcoming class from UI Extension Forestry. On April 26, The UI Extension Forestry, ...

In southern Oregon, they call it “fir-mageddon.” That’s where we first began to notice the rapid decline of the Pacific Northwest’s largest and most prolific tree. The Douglas fir is not only the ...

With so many varieties sold as Christmas trees, knowing what differentiates a Douglas fir from a Norway spruce is key to shopping for a real tree you’ll love. You’re likely to see more than one ...

Douglas fir dieback is spreading from southwest Oregon into the Willamette Valley. Long-term drought has led to swaths of weakened trees increasingly killed off by insects and disease. The flathead ...

Entomologist explains why Douglas fir trees are dying in Oregon An Oregon Department of Forestry entomologist explains how drought stress weakens Douglas fir trees, leaving them vulnerable to ...

When Brian French learned last week that the Doerner Fir was burning, he could think of only two reasons why: Either lightning had struck the enormous conifer in coastal Oregon — or someone had set it ...