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University of California, Agriculture and Natural Resources
University of California
Goldspotted Oak Borer
Goldspotted Oak Borer
Goldspotted Oak Borer
Goldspotted Oak Borer
University of California
Goldspotted Oak Borer

Host Oaks

Dead Oak


The goldspotted oak borer attacks have been found in the older, mature trees of three types of oak. Attacks have not been observed in small diameter oaks (<12 cm at breast height). For specific information on affected species, 'click' on the name of the oak species.


GSOB has been identified in Englemann Oak (Quercus engelmannii), but has not been found to be detrimental.



More Information

Coast Live Oak (Quercus agrifolia)

Canyon Live Oak (Quercus chrysolepis)

California Black Oak (Quercus kelloggii)

GSOB Host Oak Tree Species

Coast Live Oak (Quercus agrifolia)
Coast Live Oak (Quercus agrifolia)
Canyon Live Oak (Quercus chrysolepis)
Canyon Live Oak (Quercus chrysolepis)
California Black Oak (Quercus kelloggii)
California Black Oak (Quercus kelloggii)

Coordinating Workgroup Organizations:

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This site contains research-based information for education purposes. For specific guidance check with your local land management regulatory authorities. Any information on products and practices is for educational purposes only and does not constitute an endorsement or recommendation by the University of California. 

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