Gabe Thorne collects cones from a healthy whitebark pine in Sula, Montana, in 2013. U.S. officials say climate change, beetles and a deadly fungus are threatening the long-term survival of the ...

Diplodia tip blight is a fungus disease that kills the new growth on susceptible species of pine trees. The obvious sign of diplodia tip blight is seen in spring, when new needles at the tips of ...

BILLINGS, Mont. (AP) — Climate change, voracious beetles and disease are imperiling the long-term survival of a high-elevation pine tree that’s a key source of food for some grizzly bears and ...

But the U.S. Fish and Wildlife Service announced Wednesday that it will protect the whitebark pine under the Endangered Species Act, warning that a number of menaces — a deadly fungus, a hungry ...

This tree is susceptible to a number of pests and diseases, including pine wilt nematodes, sawflies, a number of moth species, and fungal diseases.

Whitebark pine trees are known as a foundational species, Hooke said, which means when whitebark pines establish themselves in an area, they allow other species to start to grow.

Half of grizzlies' prehibernation diet made up of pine nuts which are being attacked by fungus Grizzly bears in Yellowstone National Park can weigh up to 600 pounds.

A tree species that plays a critical role in the ecosystem of the greater Yellowstone area is dying off, and researchers are ...

About 100 whitebark pine tree seedlings were recently planted in Central Oregon. The tree population has been declining due to fungal disease, bark beetles and climate change.

The fugal mycelium of this disease can persist for decades below ground, living in partially-decayed woody roots long after the infected tree has died. To keep your tree from succumbing to the ...

The disease commonly affects pine species that have their needles in bundles of two or three. Austrian pine (Pinus nigra) is the most susceptible host, which is one reason the Arboretum does not ...