Help Detect Tree-killing insect in Southern California

Coast live oak killed by GSOB at William Heise State Park, San Diego County; photo by F.T. Campbell

Forest entomologists in southern California have organized the first of what they intend to be annual an annual “GSOB blitz”. The goldspotted oak borer has established widely in the region and has killed tens of thousands of California black and coast live oaks. 

The goal of the “blitz” is to train community members & organizations in detecting and reporting presence of this beetle. Survey events are scheduled in six Southern California Counties between June 1-June 15, 2025. Participants are welcome from the general public, private business, public or community organizations, etc.

Please join! & inform your friends!

To register for these training sessions, go to GSOB Blitz | UC Agriculture and Natural Resources

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