DENVER (AP) — An annual aerial survey of forest health in Colorado shows the mountain pine beetle epidemic is slowing dramatically, but the spruce beetle outbreak is expanding, forest officials said ...

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 ...

Mountain pine beetle sap, also known as pitch, appears as popcorn-like globs or masses on the tree's bark, often near entry points where beetles bore into the tree. This example was observed Monday, ...

Bark beetles can destroy spruce forests by converting the trees' defences into even more toxic substances, scientists recently discovered. But a special fungus can help the trees circumvent this ...

A plan to limit some of the effects of the spruce-beetle infestation and aspen decline in western Colorado is due to be released this spring. The U.S. Forest Service estimates that 10 percent of the ...

A new study predicts the likelihood of European spruce bark beetle damage, Ips typographus, at stand level in Finland, opening a path to proactive interventions for bark beetle management. Researchers ...

CHEYENNE – Crews from the city of Cheyenne Urban Forestry Division will begin spraying spruce trees the week of April 7 to prevent ips beetle infestation at several city parks and city-owned ...

Bark beetle-infested spruce trees begin to dry out already before any visible signs of tree mortality appear, a recent study from the University of Eastern Finland shows. Led by Dr Samuli Junttila, ...

Add Yahoo as a preferred source to see more of our stories on Google. Trees produce antibodies against harmful fungi. But bark beetles absorb these antibodies and use them to their own advantage. And ...