Distribution in California

MOB has been found in Amador, El Dorado, Lake, Marin, Mendocino, Napa, Sacramento, Sonoma, Sutter and Yolo Counties.

This is an updated map of MOB confirmations as of November 2025.

 

 

 

Source URL: https://www.ucanr.edu/site/mediterranean-oak-borer/distribution-california