California expands huanglongbing quarantine in Riverside, San Diego

Appeals to the boundary expansion must be filed in writing by May 6.

A composite graphic; the background is a map of Southern California showing sections of Riverside and San Diego counties circled in blue, indicating the boundaries of the new quarantine area. Layered on top of this map is a photo of leaves that are mottled with yellowish patches and a close-up of a small Asian Citrus Psyllid, the vector of the disease causing the discoloration of the leaves.
Shown are, in background, a screen capture of the quarantine expansion as of 3:20 p.m. MDT on April 23, 2025; at bottom left, leaves affected by HLB; and at bottom middle, an Asian citrus psyllid.
(Images courtesy of the California Department of Food and Agriculture)

The California Department of Food and Agriculture expanded the huanglongbing quarantine boundary in the Riverside area of Riverside County (grid 472) and the Valley Center area of San Diego County (grid 500), effective April 22. A map of the expanded boundaries can be found online.

Also effective April 22, the department expanded the Asian Citrus Psyllid Bulk Citrus Regional Quarantine Zone 6 in the Riverside area of Riverside County and the Valley Center area of San Diego County to reflect the HLB quarantine boundary expansion. A map of the expanded boundary can be found here.

Regulated articles and conditions for intrastate movement under the quarantine can be found at Title 3 of the California Code of Regulations sections 3435 and 3439. Pursuant to those regulations, any interested party or local entity may appeal a quarantine area designation.

The appeal must be submitted to the department in writing and supported by clear and convincing evidence. The appeal must be filed no later than 10 working days from the date of the notification. During the pending of the appeal, the designated quarantine boundary under appeal shall remain in effect.

Appeals should be mailed to: CDFA - Citrus Division, 1220 N Street, Sacramento, CA 95814

The California Code of Regulations allows interested parties to be notified of quarantine area boundary changes, as well as the opportunity to submit quarantine boundary appeals. Those interested can sign up online for regulatory updates via email.

Questions regarding the regulations or map can be sent to Kiana.Dao@cdfa.ca.gov or by calling 916-274-6300.

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