More than half a million acres of trees spread across Washington were sick, struggling, or dead last year, according to the ...

A swarm of destructive wasp-like insects is spreading fast, and it could mean bad news for pine trees, holiday traditions, and your backyard.

Summer is here, and that means ticks are, too. Why it matters: Ticks, which are most active in warmer seasons, transmit Lyme ...

Pine sawflies are invasive bugs that resemble wasps and are taking over pine trees in Washington's Pierce County.