Goldspotted Oak Borer (GSOB) has recently been found to be causing significant mortality in three different Oak tree species in San Diego County. This invasive pest was found in San Diego County several years ago, but only recently has it been linked to the death of three common oak tree species. The insect pest is still confined only to San Diego County in California, and has not been found here in Riverside County. The pest is spread primarily through the movement of infested firewood. Due to the proximity of Riverside County to San Diego County, we are asking for the public's help in preventing the introduction of this pest into our county.

The links below have been provided to help answer questions about GSOB and the serious threat to the oak trees in our county. Information about GSOB will be updated as necessary so please check back frequently.

Website Links

UC ANR - GSOB Working Group

UC Riverside - Center for Invasive Species

California Forest Pest Council

California Firewood Task Force

Educational Materials

Oak Firewood Advisory Flyer

Vendors and Sellers Oak Firewood Advisory Flyer

US Forest Service GSOB Flyer

UC GSOB Pest Note

UC GSOB Field ID Guide

CalFire GSOB Tree Note

USDA FS Pest Alert 2008

Newspaper Articles

NC Times - 2/13/2010

Press Enterprise - 12/24/2009

Idyllwild Town Crier - 9/23/2010

Last Update: 9/21/2011