There is a low-key battle with bark beetles underway on the flanks of Aspen Mountain. Colorado State Forest Service workers marched down steep slopes two weeks ago, stapling thousands of pheromone ...

Douglas fir dieback, caused by drought and insects, has spread from southwest Oregon into the Willamette Valley in a major ...

As Colorado experiences its signature whiplash weather, arborists are warning that stressed trees are more vulnerable to pests and diseases. Peel back the bark, and you may find a predator in your ...

While bark beetles have been slowly infesting trees in Aspen, winter won’t offer any respite. Aspen is currently home to the Douglas-fir beetle, the spruce beetle, the mountain pine beetle, Ips ...

The rapid decline of our largest and most prolific tree in the Pacific Northwest andmost important tree species to the ...

Concerned Vancouver residents have raised the alarm about a 400-year-old Douglas Fir tree cut down in Stanley Park. Norm Oberson, a provincially-certified tree risk assessor, said he was contacted two ...