The goldspotted oak-borer, an invasive beetle responsible for killing 200,000 trees in Southern California, is now present in ...

‘I have some weird, seemingly hollow, green, round balls falling from my oak tree. What in the world are these things?” — S.Y. You are describing an interesting growth that can occur on a variety of ...

A drive to the mountains in San Diego County means you're surrounded by nature, trees especially, which have been facing a major threat from something so small you might not even notice it. You will ...

It’s less than a half-inch long but it can fell a giant oak tree in no time. The goldspotted oak borer, GSOB or Agrilus auroguttatus, is a 0.4-inch bullet-shaped beetle with six golden spots on its ...

Many caterpillars feed on the leaves of oak trees. Most will not do much damage, but some can pose a real threat to the health of the tree. Here’s what you need to know to identify the caterpillars on ...

Oak trees around Minnesota have suffered from bouts of heavy precipitation and drought — conditions that make them more vulnerable to two-lined chestnut borer, a beetle that eats the inner bark of oak ...

AUSTIN (KXAN) — As the winter months roll in through Central Texas, so, too is oak wilt season. Oak wilt is one of the most impactful tree diseases nationally, and is particularly destructive here in ...

“They’re really majestic trees,” she says. “They go back centuries of importance to people.” Hagerty, an arborist for 11 years, and the owner of Arbor Gold Tree Services in Plymouth, is fighting to ...