State and Private Forestry - Pacific Southwest Region
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Pacific Southwest Region |
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Contact Web Manager |
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State and Private Forestry (707) 562-8921 |
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Goldspotted Oak Borer |
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| The goldspotted oak borer (GSOB) Agrilus coxalis (Coleoptera: Buprestidae), is a wood borer native to southeastern Arizona, southern Mexico, and northern Guatemala. It is believed to be introduced into California and was first collected in San Diego Co. in 2004. In 2008, GSOB was linked to continuing oak mortality occurring since 2002 across all land ownerships. Tree mortality associated with GSOB was estimated at >20,000 covering an area of 4903 km2 (2009). Extensive larval feeding at the interface of the phloem and xylem leads to tree mortality after several years of injury. The goldspotted oak borer is currently the most significant insect threat to oaks in California and its known hosts range from southern California up to Oregon. Oak mortality is impacting aesthetics, property values, increasing health hazards in high-use areas, diminishing wildlife habitat, and changing the fuel structure in areas prone to wildfire. |
Oak Mortality, San Diego County, 2003-2009 |
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GSOB Information
Current GSOB Activities: Entomology and Pathology
Collaborators with FHP on GSOB Studies
2010 2009 2008 Outreach Publications
Additional Information
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USDA Forest Service - State and Private Forestry
Last Modified: Monday, 24 October 2011 at 18:37:21 EDT