HLB Virus Information and Resources 

**CITRUS QUARANTINE EXPANDED IN SAN DIEGO COUNTY AS OF 2026**

Parts of San Diego County are under a citrus quarantine due to the HuanglongBing (HLB) virus spreading from the Asian Citrus Psyllid. Oceanside, Valley Center, Escondido, and now Fallbrook are under quarantine. 

IF YOU BELIEVE YOUR PLANT IS AFFECTED PLEASE CALL THE CITRUS PEST HOTLINE: 1-800-491-1899

 The map of quarantined areas and regulation boundaries can be found on the CDFA Website.

The image is a map showing the 2026 Huanglongbing (HLB) quarantine boundaries in California, with grid numbers and county outlines.
Updated as of 7/30/2026

Check out the Citrus Pest and Disease Prevention Program Citrus Insider Informational Materials.

 

Infographic about citrus quarantine in California due to Huanglongbing (HLB) disease, symptoms, affected areas, and actions to take.
From County of San Diego.