California's oldest tree, a Palmer's oak thought to be 13,000 to 18,000 years old, may be threatened by a proposed development, environmentalists say.

As the name suggests, California oak moths are a native species, and their offspring like to feed on native coast live oak trees, or any other oak tree that happens to be in their path. Despite ...

The goldspotted oak borer is just 14 miles from the Santa Monica Mountains' 600,000 oak trees and threatens to devastate forests throughout California, harming wildlife and increasing fire risks.

In California’s coastal forests, health is anything but good. Since 1995, a pathogen that causes a phenomenon dubbed ‘sudden oak death’ (a far catchier name than that of the pathogen itself ...

Two years ago, my husband and I volunteered to help conduct a sudden oak death (SOD) blitz in Marin County. After training, we surveyed bay laurel trees on Belvedere Island as well as the Tiburon ...

More than one million trees along California’s coast have died from Sudden Oak Death since its discovery in 1994. Santa Clara and San Mateo are among the 14 counties where the disease is present.