‘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 ...

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

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 ...

Invasive goldspotted oak borers have been newly detected in Ventura County. UC ANR is calling on community scientists to ...

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 ...

Most oak tree insects in the larval stage just sit there in oak branches. They have glycerine, a kind of antifreeze that allows them to survive even the harshest winters. In the fall acorns, the seed ...

“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 ...

Question: Yesterday I read that “oaks are a keystone species”. What exactly does that mean? Answer: A keystone species is a plant, animal or microorganism that is vitally important to its environment.

Oak wilt, a lethal tree disease in which species such as Mizunara and Kashiwa oaks are attacked by insects and eventually d ...