Who runs the citrus quarantine program?
In California, CDFA and each county's agricultural commissioner; at the federal level, USDA (APHIS). Here are their official pages and phone numbers.
State of California
- CDFA Citrus Pest & Disease Prevention DivisionSet up in 2019 inside the California Department of Food and Agriculture (CDFA). It looks for citrus pests and diseases with traps and surveys, runs the control programs, and enforces the quarantine rules. Pest hotline: 1-800-491-1899. (checked October 9, 2026)www.cdfa.ca.gov
- Citrus Pest & Disease Prevention Committee (CPDPC)Advises the CDFA Secretary and the citrus industry on fighting citrus pests and diseases. Its meetings are open to the public (recent ones in person and by webinar); agendas are posted on its page. Anyone may comment (up to 3 minutes per item) and suggest topics. CDFA announces open committee seats in its press releases. (checked October 9, 2026)www.cdfa.ca.gov
- CaliforniaCitrusThreat.orgThe public-education site of the Citrus Pest and Disease Prevention Program, which is funded by California citrus growers and run by CDFA. (checked October 9, 2026)californiacitrusthreat.org
- CDFA: Report a PestCall the pest hotline (1-800-491-1899), use the online form, or call your county agriculture department. (checked October 9, 2026)www.cdfa.ca.gov
Federal government
University of California
County agricultural commissioners
Each county has an agricultural commissioner who works with CDFA; you can call them to report a pest. Tap the county for its official site, or the number to call.
Counties with quarantine areas today
The other 51 California counties
Source: CDFA — County Agricultural Commissioners & Sealers contact information (effective October 6, 2026) · CDFA directory (checked October 9, 2026). The Los Angeles number is from the county's own contact page.
TreeCheck is independent and not affiliated with CDFA, USDA or UC. For any decision, follow what CDFA tells you.