The California Board of Forestry periodically updates the Goldspotted Oak Borer Zone of Infestation (GSOB ZOI) to include new areas of infestation and areas with increased risk to host oak trees. This page features the maps produced in 2019.
Maps courtesy of Kim Corella at CalFire
GSOB Zone of Infestation (ZOI) in
San Diego, Riverside, Orange, Los Angeles and San Bernardino Counties
Maps of the ZOI as of 2019 are shown below by county: San Diego, Riverside, Orange, Los Angeles, and San Bernardino.
GSOB Distribution in San Diego County
(2019)
GSOB Distribution: Riverside County
(2019)
(Printable JPG)
(Printable PDF)
GSOB Distribution: Orange County
(2019)
(Printable JPG)
(Printable PDF)
GSOB Distribution: Los Angeles County
(2019)
GSOB Distribution: San Bernardino County
(2019)
