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

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FOR INFORMATION AND ACTION 
DA-2025-28 
July 11, 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 Coto de Caza area of Orange County by 11 square miles, the Rancho Santa Margarita area of Orange County by 93 square miles, the Perris area of Riverside County by 37 square miles, and the Rancho Cucamonga and San Bernadino areas of San Bernadino County by 88 square miles. These measures parallel the intrastate quarantines that CDFA established on May 19 (Orange and San Bernadino Counties), June 17 (Orange County), and July 1 (Riverside County), 2025. APHIS is taking this action because of citrus greening detections in plant tissue samples collected from residential properties in Orange, Riverside, and San Bernadino Counties. There are 1.44 acres of commercial citrus impacted by this expansion. 

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 web page 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: 

 

/s/

Matthew A. Rhoads 
Acting Deputy Administrator 
Plant Protection and Quarantine