Goldspotted Oak Borer Training


The goldspotted oak borer (GSOB) is an invasive, woodboring beetle responsible for significant and on-going oak tree mortality in southern California, specifically San Diego, Riverside, Orange, and Los Angeles Counties. GSOB was first detected in California in 2004. Researchers believe that GSOB arrived in California in infested firewood that was transported from its native range in southeastern Arizona. In California, GSOB has attacked and killed over 20,000 oaks, including California black oak, canyon live oak, and coast live oak. 

The native ranges of California black oak and canyon live oak extend into southern Oregon, and both species are a significant component of our native oak woodlands. Considering that GSOB could be one infested load of firewood away, we are on the lookout for signs of this pest in Oregon. If we can detect GSOB early, we have a chance at eradicating an incipient population before it becomes established. 

For more information, you may review the module below or check out our resources page.

Goldspotted Oak Borer Learning Module

Goldspotted Oak Borer Learning Module

Estimated Time: 17 minutes

Special thanks to entomologists Tom Coleman (USDA Forest Service) and Bill Schaupp (USDA Forest Service) for reviewing the content of this learning module. 

Photo Credit: Mike Lewis