Distribution in California

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

 

This map shows the progression in the spread of Mediterranean Oak Borer from 2020 through 2024.
Source URL: https://ccfruitandnuts.ucanr.edu/site/mediterranean-oak-borer/distribution-california