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 ...

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 ...

Despite the damage incurred by recent hurricanes, notably Hurricane Michael in 2018, the pine tree industry in Florida still is a major contributor to the state’s economy. This industry includes the ...

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Mountain pine beetle-killed trees at Lookout Pass in 2002. Provided by Idaho Dept of Lands. Bark beetles are only about the size of a grain of rice. But for such tiny critters, they can take a big ...

Bark beetles are dark flying insects about the size of a grain of rice that leave tiny holes in the bark and branches of trees. Their very small grubs feed voraciously on the inner bark of trees that ...

Q: We just noticed that our pine tree has a lot of loose bark. I guess we’re not very observant because it looks like it’s been going on for some time. Is this due to the drought? We have not been ...

A scientist helps save Crater Lake’s whitebark pine trees from an invasive fungus. In 2002, “Oregon Field Guide” told the story of how an invasive fungus called blister rust was killing Crater Lake's ...

SPOKANE, Wash. — Spokane's urban forest is facing a significant challenge due to a pine bark beetle outbreak, which has resulted in the removal of at least 200 Ponderosa trees. Urban Forester Katie ...