Parts of California See New Expansion in Citrus Greening Quarantine

USDA’s Animal and Plant Health Inspection Service (APHIS), in cooperation with the California Department of Food and Agriculture (CDFA), is expanding the area quarantined for citrus greening (aka, HLB) in parts of southern California.

APHIS is establishing a new quarantined area in the Ramona area of San Diego County of 93 square miles and is expanding the quarantined area in the Loma Linda area of San Bernardino and Riverside Counties by 26 square miles. These measures parallel the intrastate quarantines that CDFA established on March 2, and March 6, 2026, respectively.

APHIS is taking this action because of citrus greening detections in plant tissue samples collected from residential properties. There are 25.16 acres of commercial citrus impacted by the new Ramona quarantine and 411.47 acres of commercial citrus impacted by the Loma Linda area expansion.

Similarly, APHIS expanded the quarantined area in the Corona area of Riverside County and the San Juan Capistrano area of Orange County back in January.

Click here to see specific changes to the quarantined areas in California and beyond.

APHIS will publish a notice of this change in the Federal Register.