ACP/HLB Updates for SLO, Santa Barbara and Ventura Cos

Nov 18, 2022



ACP Update

The next Area Wide Management coordinated grower treatment window will be in January. Be sure to renew permits as needed with the County Agriculture Department. Growers are also encouraged to work with your pest management professionals to stay vigilant with regular monitoring of your trees for ACP, especially young trees and along grove perimeters. Research shows that in generally infested areas like Santa Barbara County, keeping ACP populations low reduces the risk of citrus trees acquiring the bacteria that causes the deadly HLB disease. 


Please consider removing citrus that is no longer being cared for or is not worth the resources required to protect it from ACP & HLB.  


Biological Control Releases

Monthly releases of the ACP biological control agent Tamarixia radiata continued in October in residential areas of Santa Maria, Guadalupe, and Orcutt in the northern part of the county, and to the south in Goleta, Santa Barbara, Montecito, Summerland and Carpinteria. 


En Español -- Spanish Language ACP/HLB Presentations

Las grabaciones de video y solamente audio están disponibles a continuación para nuestras presentaciones en español ACP / HLB desde el 27 de septiembre de 2022. Francisco Macías, asesor local de control de plagas, dio una presentación general sobre ACP y HLB, y Rafael Raygoza de la oficina agrícola del condado de Ventura presentó sobre las inspecciones. El evento fue moderado por Maureen McGuire de la Oficina Agrícola del Condado de Ventura y el Grupo de Trabajo ACP / HLB. Muchas gracias a nuestros presentadores y moderador por proporcionar esta valiosa información en español.


Video and audio-only recordings are available below for those who missed our Spanish language ACP/HLB presentations on September 27, 2022. Francisco Macias, a local pest control advisor, gave a general presentation on ACP and HLB, and Rafael Raygoza with the Ventura County Agricultural office presented on inspections.  The event was moderated by Maureen McGuire from the Ventura County Farm Bureau and ACP/HLB Task Force. Muchas gracias to our presenters and moderator for providing this valuable information in Spanish.  


Video presentation

Audio-only recording


HLB Quarantine Update

As of October 28, a total of 3,942 trees and 501 ACP have tested positive via PCR for the bacterium that causes HLB. Trees that test positive are treated for ACP and removed, and the HLB quarantine may be expanded. Additional ACP treatments and HLB detection surveys are conducted on a recurring basis to remaining citrus within 250 meters of each detection. 


Counties where HLB has been detected via PCR testing are Los Angeles, Orange, San Diego, Riverside, San Bernardino and San Diego, with the majority of detections in Orange County. Recent expansions of the HLB quarantine occurred in Riverside and Orange counties. To see a map of the current HLB quarantine areas, and other details of locations and numbers of HLB detections, please visit


To help you prepare for the regulatory impacts of HLB, please refer to CDFA's Information for Citrus Growers/Grove Managers,  Action Plan for ACP and HLB or this summary flier for information on regulatory and treatment requirements growers can expect when HLB is detected in or near your citrus grove or packing house.


Upcoming CPDPC Meetings -- Webinar and In Person 

All meeting agendas and eventually the minutes are posted at committee/. All meetings are free and open to the public to listen to or make public comment. Meetings are currently in person and accessible via phone and/or webinar. Links to register for and join meetings are included in agendas when posted. 

For a list of current committee members, click here


Additional ACP/HLB Resources

oInformation on the state ACP/HLB program including maps, quarantine information, and a signup option for email alerts:

oBiology of ACP and HLB, detection maps and recommendations for monitoring, eradication and management: 

oUC IPM recommendations for ACP

oWeb-based map to find out how close you are to HLB:

oVideo on Best Practices in the Field, available in English and Spanish

  • Research

oUC Ag Experts Talk presentations on management of various citrus pests and diseases are available for viewing here and here on YouTube.

oSummaries of the latest research to combat HLB:

oScience-based analyses to guide policy decisions, logistics, and operations:

  • Regulatory/Quarantine

oSign up for program updates from the Citrus Pest and Disease Prevention Division at www.cdfa/signup-email-updates.

oRegulatory requirements for moving bulk citrus: Information for Citrus Growers

oSummary of regulatory requirements in the event of an HLB detection in commercial citrus:

oSanta Barbara County Ag Commissioner's Office




Cressida Silvers

CA Citrus Pest and Disease Prevention Program

ACP/HLB Grower Liaison

Ventura, Santa Barbara and San Luis Obispo Counties

805 284-3310 (phone or text)

By Ben Faber
Author - Advisor

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