If you take a close look at some of the more established trees in your landscape, you may notice something you cannot seem to describe – it may look to you like a kind of fungus on your tree trunk. Is ...

A beloved 250-year-old tree in Kansas City is set to be removed after succumbing to root fungus, marking the end of an era ...

Spruce bark beetles hijack their host tree’s chemical defenses, transforming them into potent weapons against fungal threats.

Q: I recently noticed a black, tar-like patch on my tree trunk, though it’s not tacky like actual tar. Are these insect eggs? Dried sap? Do I try to scrape it off? The tree has lichen but I don’t ...

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

An interesting amber-colored mushroom is showing up in many gardens. It’s actually kind of pretty, but it’s scaring some folks, especially when tree care companies and arborists report that it is ...

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

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

The list of diseases attacking trees in the Pacific Northwest grows every year. A pathogen new to Pierce County brings an added concern: It can injure people. A research project using citizen ...