APHIS Expands the Citrus Greening (Huanglongbing) Quarantined Area in California

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FOR INFORMATION AND ACTION 
DA-2025-48 
November 25, 2025

Subject: APHIS Expands the Citrus Greening (Huanglongbing) Quarantined Area in California
 
To: State, Tribal, and Territory Agricultural Regulatory Officials

Effective immediately, the USDA’s Animal and Plant Health Inspection Service (APHIS), in cooperation with the California Department of Food and Agriculture (CDFA), is expanding the areas quarantined for citrus greening (Huanglongbing; HLB), caused by Candidatus Liberibacter asiaticus, in California. APHIS is expanding the quarantined area in the Capistrano Beach area of Orange County by 29 square miles and the Murrieta area of Riverside County by 129 square miles. These measures parallel the intrastate quarantines that CDFA established on October 22, 2025. APHIS is taking this action because of citrus greening detections in plant tissue samples collected from residential properties in Orange and Riverside Counties. There is no commercial citrus impacted by the expansion in Orange County. There are 170 acres of commercial citrus impacted by the expansion in Riverside County. 

APHIS is applying safeguarding measures outlined in 7 CFR 301.76 and Federal Orders pertaining to the interstate movement of regulated articles from the quarantined areas in California. This action is necessary to prevent the spread of citrus greening to non-infested areas of the United States. 

The APHIS Citrus Greening website contains specific changes to the quarantined areas in California. APHIS will publish a notice of this change in the Federal Register. 

For additional information you may contact:

Abby R. Stilwell 
Agriculturist 
(919) 323 -6296 
abby.r.stilwell@usda.gov

/s/

Matthew A. Rhoads 
Acting Deputy Administrator 
Plant Protection and Quarantine