San Diego County has experienced the loss of tens of thousands of oak trees as a result of goldspotted oak borer attacks. With more than a million acres of susceptible oaks in southern California and millions more acres throughout the state, communities are encouraged to work collectively to develop prevention, monitoring, and response plans before GSOB strikes. Guidelines for strategic action before GSOB strikes your communities are available as a PDF brochure download.
Infested Live Trees
See management options discussed in the University of California Integrated Pest Management publication, UC IPM Goldspotted Oak Borer Pest Note.
Several land managers, tree care professionals and homeowners have inquired about insecticide treatments and methods, which could be used to protect oaks not yet affected by GSOB or to salvage infested trees that are still alive. At this time it is not known which insecticide, if any, will effectively and safely control GSOB. Due to the many complex issues involved with insecticide use, any management program utilizing chemicals cannot be recommended until adequate research on GSOB in our geographic area has been completed. Research studies currently in progress will help determine if insecticide use may be an effective, cost efficient and safe component of a management program for GSOB. For more information, refer to these resources from the University of California Integrated Pest Management program:
Infested Dead and Downed Trees
- Professional Tree Care Association of San Diego (Website)
- International Society of Arboriculture (Website)
- National Arborists Association - Call 1.800.733.2622
- American Society Consulting Arborists (Website)
- To verify California License (#D49-Tree Service Contractor) (Website)
Note: Your local telephone directory may also provide listings for arborists and local tree care specialists.