Invasive oak pest found in Riverside County
The goldspotted oak borer (GSOB) has been detected in a recently-killed California black oak tree in the Riverside County mountain community of Idyllwild.
Larvae extracted from under the tree bark were subjected to DNA analysis at the University of California Riverside and confirmed to be Agrilus auroguttatus, the scientific name for GSOB. This new detection of GSOB represents the first long-distance movement of the beetle from its known area of infestation in San Diego County, 40 miles to the south. It is believed to have made the jump from San Diego to Idyllwild through the movement of infested firewood. The infested tree is slated for immediate removal and disposal.
The GSOB is transported in oak firewood, so it is critical that Californians keep firewood local and not move it out of the area.
“The public plays a key role in stopping the spread of the destructive GSOB,” said CalFire Director and State Forester Ken Pimlott. “When choosing firewood make sure you buy it from a local source and not from out of the area. This infestation could have devastating effects on California and we all must work to stop its spread.”
The California Department of Forestry and Fire Protection is collaborating with the University of California, the U.S. Forest Service and the County of Riverside to develop a rapid response plan for GSOB in San Jacinto forest communities. Surveys are already in progress to determine the extent of the infestation.
“This discovery of GSOB in Riverside County is of great concern,” said CalFire/Riverside County Fire Chief John R. Hawkins. “These mountain communities have endured years of drought and bark beetle infestation and we need to work collaboratively with the public and all stakeholders to stop the GSOB from further destroying our forest and oak woodlands.”
Anyone planning to purchase or burn firewood is encouraged to visit www.firewood.ca.gov to learn how help stop the spread of GSOB and other pests through the movement of firewood.
For more information on GSOB, visit www.gsob.org.