"We did find that they can parasitize multiple oak gall wasp species and that they can spread," Prior said, per Bing U News. ...

In a matter of weeks, the larvae will eat the host insect entirely. A scientist says the wasps have no plans of eating human ...

An invasive insect has caused noticeable damage to Oregon’s white oak trees in 2022, the Oregon Department of Forestry said.

Oak wilt is a fungal disease that damages the vascular system of oak trees, limiting their ability to take up water. It is spread by root grafts, insects, or poor pruning techniques.

"I have some weird, seemingly hollow, green, round balls falling from my oak tree. What in the world are these things?" — S.Y.

Years of drought conditions in the Midwest and Great Plains have opened the door for pests and diseases that are killing trees. Now people working in parks and forests are planting new species ...

The oak lace bug is native from southern Canada to the Eastern, Central and Southern United States. In Oregon, they are mostly a pest of urban oaks but can infest related trees. The insects are an ...

The Minnesota DNR’s forestry health program, working with the state Department of Agriculture and other partners, are the CDC of tree health in Minnesota.

Drought in the middle of the country has opened the door for pests and pathogens that can kill trees. That's particularly true of a fungus that's decimating bur oak trees once known as the "King of ...