Red Imported Fire Ant & Goldspotted Oak Borer

Red Imported Fire Ant

Orange County is currently within the regulated Red Imported Fire Ant Federal Quarantine area. Various areas throughout the county have been found to be infested with this invasive pest and eradication efforts are underway by the Orange County Vector Control District. As part of this effort, the California Department of Food and Agriculture has established a toll-free RIFA Hotline to report any suspect ant locations. Anyone finding suspected Red Imported Fire Ants should report them to the hotline at 1-800-491-1899.

Images of Red Imported Fire Ant Activities

Goldspotted Oak Borer

An infestation of the Goldspotted Oak Borer (GSOB – Agrilus auroguttatus) has been discovered in approximately 30 oak trees in Orange County as of December 2014. The GSOB is a non-native invasive beetle that has killed an estimated 80,000 oak trees in San Diego County. An infestation of just over 50 trees has also been identified in the community of Idyllwild in Riverside County. Scientists believe that the insect was transported to San Diego County via oak firewood from its native range in southeastern Arizona. The Irvine Ranch Conservancy, OC Parks, the Nature Reserve of Orange County, USDA Forest Service, UC Riverside, UC Cooperative Extension and Orange County Fire Authority are currently working in partnership to identify infected oak trees and develop a pest management plan for the GSOB in Orange County. Because the GSOB reaches adult maturity in May – June, we would like to identify trees that are potentially infested before then so that we can reduce the spread of adult GSOB into healthy trees this summer. You can help in our efforts by not moving firewood out of local areas as this is the primary mechanism for widespread infestation. Please do your part and keep firewood local.