Bark beetles can destroy spruce forests by converting the trees' defences into even more toxic substances, scientists ...

Spruce bark beetles don’t just tolerate their host tree’s chemical defenses—they actively reshape them into stronger ...

Then there is the fungus, Beauveria bassiana. This fungus is neither the tree’s nor the beetle’s friend; as a pathogenic ...

An Ashland reader recently noticed some curious little, almost lantern-like attachment appearing on her spruce. At first glance, these little cocoons looked like little lanterns in her evergreen.

A study has identified genes involved in development of stone cells -- rigid cells that can block a nibbling insect from eating budding branches of the Sitka spruce evergreen tree. The insect's attack ...

How trees fare under drought depends heavily on their past experiences. In some cases, adversity breeds resilience: Spruce trees that experience long-term droughts are more resistant to future ...