A warm, dry spring across El Paso County has left trees in distress and in some cases wearing the signs of several years of hardship. Evergreens display the battle scars of radical temperature swings, ...

CARBONDALE — Beneath the bark’s surface, a small green bug has been sucking the nutrients out of Carbondale’s ash trees for the past two decades. “Our ash trees are inundated with emerald ash borer,” ...

Fungi may help some tree-killer beetles turn a tree’s natural defense system against itself. This fungi-made perfume might explain why bark beetles tend to swarm the same tree. As climate change makes ...

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 ...

SEQUOIA NATIONAL PARK, California — High in the evergreen canopy of General Sherman, the world’s largest tree, researchers searched for evidence of an emerging threat to giant sequoias: bark beetles.