Citrus Quarantine Program (CQP)

Asian Citrus Psyllid

The department’s Citrus Quarantine Program (CQP) supports and promotes the local citrus industry by enforcing Asian Citrus Psyllid (ACP) and Huanglongbing (HLB) quarantine regulations. Inspections conducted by CQP inspectors ensure compliance in order to suppress the movement of ACP and therefore mitigate the potential spread of HLB into the region. 


********** Updates (As of 07/27/2020) Posted Below **********

Updated Regulations on Bulk Citrus Movement into the HLB Quarantine Area

This is a reminder that, effective April 30, 2020, the California Department of Food and Agriculture (CDFA) revoked Quarantine Commodity (QC) permit number 1486. QC 1486 originally authorized the intrastate movement of bulk citrus fruit from the Asian citrus psyllid (ACP) Bulk Citrus Regional Quarantine Zones 2, 3, 4, 5 or 7, into the Huanglongbing (HLB) quarantine area, without meeting the ACP-free performance standard. The motion to revoke QC 1486 was unanimously passed by the Citrus Pest and Disease Prevention Committee (CPDPC) at a committee meeting on March 11, 2020. CDFA subsequently approved the motion and its implementation began this month. Read more about these changes here.


NEW HLB Find in Tijuana, Mexico

    An ACP (Asian Citrus Psyllid) on the outskirts of Tijuana tested positive for Clas, the bacteria that leads to Citrus Greening (a.k.a. HLB). The infected psyllid was found seven miles south of the US-Mexico border. This is the first time an HLB positive psyllid has been found in the area since the United States Department of Agriculture (USDA) began its cooperative program with Mexico. The USDA works cooperatively with Mexico to conduct area wide treatments, biocontrol and surveys in the border region to help prevent the spread of HLB. The find site is currently being treated and surrounding trees and ACP are being tested for HLB. Updates to follow as more info becomes available. 

    As of July 27, 2020, a total of 1,964 trees and 306 ACP samples have tested positive for the HLB bacterium on a total of 1,423 sites. The sites are located in the following counties: Los Angeles, Orange, Riverside, and San Bernardino.



New! The Citrus Pest & Disease Prevention Program (CPDPP) Released a new 30-second Public Service Announcement (PSA), “What If California Citrus Disappeared?”

What if citrus disappeared?

English Version (YouTube) | Spanish Version (YouTube)

And if you haven't seen the County of San Diego's ACP/HLB PSA, click below!


Don't Spread the Asian Citrus Psyllid (YouTube)


California Citrus Pest and Disease Prevention Committee (CPDPC) endorses “Best Practices for Growers in Response to HLB in California.”

To provide California citrus growers with a strong toolbox of options to protect their orchards from Huanglongbing (HLB), the Citrus Pest & Disease Prevention Committee has endorsed the following “Best Practices for Growers in Response to HLB in California.” The recommendations – which are grouped based on a grower’s proximity to an HLB detection – represent the most effective tools known to the citrus industry at this time and are meant to supplement the California Department of Food and Agriculture’s required regulatory response.

Growers are encouraged to use as many methods as feasible for their operation in order to limit the spread of the Asian citrus psyllid (ACP) and HLB, as the cost to manage the Asian citrus psyllid is far less than any potential costs or loss to the industry should HLB take hold throughout our state.

Please visit for more information.


Huanglongbing (HLB) Sampling for Growers

HLB Sample Collection and Submission Protocol

Citrus Pest Detection Program (CPDP) Services

The following are links that are provided to assist both homeowners and industry members alike.


Citrus Pest & Disease Prevention Program (CPDPP)

Homeowner Oriented:

Industry Oriented:


California Department of Food and Agriculture (CDFA) ACP Information

CDFA Notice of Treatment (NOT) Information

CDFA currently coordinates areawide treatments for ACP present in San Diego county when no other mitigation methods are available. CDFA posts Notices of Treatment (NOTs) at least 48 hours in advance of any treatment. To view NOTs for San Diego county, please click here.


United States Department of Agriculture Animal and Plant Health Inspection Service (APHIS) Citrus Information


Contact Information

Residents can contact the San Diego County Dept. of Agriculture, Weights & Measures’

Citrus Quarantine Program at or by calling (858) 614-7770 for more information.

Commercial Growers can also contact the San Diego County Grower Liaison, Robert Atkins, at for more information.


Entomology Lab

Email (Please put “Entomology” in the subject line to ensure timely routing) or call (858) 614-7738 for more information.