Helena’s recent wave of brutally cold temperatures probably isn’t doing much to beat back the mountain pine beetle infestation that’s killing hundreds of thousands of evergreen trees around here.

BOULDER - Western U.S. forests killed by the mountain pine beetle epidemic are no more at risk to burn than healthy Western forests, according to new findings by the University of Colorado Boulder ...

BISHOP, Calif. — Forest pathologist Martin MacKenzie strode forward on a narrow path through California’s mythic bristlecone pine forest in the White Mountains near the Nevada border, methodically ...

Trees, especially pine trees, are in for challenging times. Although pine trees are relatively drought tolerant, ongoing drought, as we’ve experienced in Marin County for several years, has caused ...

This month's early cold snap may have killed a few mountain pine beetles, but probably not many, according to a scientist with the U.S. Forest Service. Unseasonably cold weather sometimes is more ...

The Local newsletter is your free, daily guide to life in Colorado. For locals, by locals. Herbal tea may soothe your nerves, but it’s stinky stuff if you’re a bark beetle. So say U.S. Forest Service ...

LOS ALAMOS, N.M., November 23, 2021—In California’s Sierra Nevada, western pine beetle infestations amped up by global warming were found to kill 30% more ponderosa pine trees than the beetles do ...

CHERRY HILLS VILLAGE, Colo. — A homeowner in Cherry Hills Village noticed that his 90-foot spruce tree wasn't looking so good this spring. By August, the tree was almost completely dead. Denver ...

JOINT BASE LEWIS-MCCHORD, Wash. — A state’s insect expert called the discovery of a tree-killing bark beetle in a Bothell trap “concerning.” Washington state officials have been tracking the migration ...

11:07 a.m. June 29, 2022: A previous version of this story misspelled Constance Millar’s first name. Forest pathologist Martin MacKenzie strode forward on a narrow path through California’s mythic ...

BISHOP, Calif. — Forest pathologist Martin MacKenzie strode forward on a narrow path through California’s mythic bristlecone pine forest in the White Mountains near the Nevada border, methodically ...