The invasive goldspotted oak borer has spread across SoCal, leaving boneyards of dead trees behind. This June, UC ANR and ...

Black oak (Quercus velutina) is a deciduous, medium-to-large oak tree is commonly found in the eastern half of the United States. A black oak tree can be identified by its bark and leaves.

There are four species of oak trees the insect has been affecting: the coast live oak, California black oak, canyon live oak, ...

Trees generally die within three years of an incursion. The insects go only for oaks. In the Golden State, they are attacking the coast live oak, canyon live oak and the California black oak.

The GSOB only infests oak trees, namely the three native to California: coast live oak, canyon live oak and the California black oak. These are the most prevalent trees that make up Southern ...