The Goldspotted Oak Borer (GSOB) is tiny beetle that’s infesting and killing oak trees in San Diego County. This beetle came from Arizona, where the environments have predators that naturally keep the beetle populations under control. Here in California, the only method of controlling the spread of GSOB is containment.
Cut wood that’s infested is still a threat, so don't move firewood, and follow some basic containment techniques to keep any mature beetles from escaping and reproducing.
University of California Agriculture & Natural Resources - Integrated Pest Management Program
California Firewood Task Force - Learn about the "Buy it Where You Burn It" campaign
Firewood Scout - Need to buy firewood? Find a vendor that knows where their supply comes from and has taken necessary precautions by seasoning the wood for two years or heat treating it.
California resources & info on Don't Move Firewood dot org