Bark beetles moving between trees routinely carry two fungi that are responsible for the Dutch elm tree disease outbreak.

CODY, Wyo. — In the coming years, loggers may cut thousands of trees atop Carter Mountain that are dying from infestation by an army of tiny, forest-ravaging beetles. An epidemic of bark beetles has ...

On the northwest corner of Manito Park, dozens of ponderosa pines appear to stand strong. Joggers and dog walkers weave ...

Spruce bark is rich in phenolic compounds that protect trees from pathogenic fungi. A research team at the Max Planck Institute for Chemical Ecology in Jena has investigated how these plant defenses ...

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 Alabama Forestry Commission is working with Wiregrass timber owners to try to save the timber industry from the outbreak of Ips Bark Beetles. “Ips Bark Beetles are hitting our pines very hard,” ...

Adult spruce bark beetles in their galleries in the bark of a Norway spruce tree. The beetle in the middle is infected with the fungus Beauveria bassiana. Spruce bark is rich in phenolic compounds ...

Clockwise from top left: (1) Two lodgepole pines growing side-by-side with notably different bark textures, (2) a rough-barked limber pine that has been attacked by bark beetles, (3) a limber pine ...

Bark beetle-infested spruce trees begin to dry out already before any visible signs of tree mortality appear, a recent study shows. Bark beetle-infested spruce trees begin to dry out already before ...

ISLAND PARK, Idaho – Oblivious to the dry summer heat, Forest Service silviculturist John Councilman hikes through a stand of trees looking for signs of violent struggle. It doesn’t take long.