Treatment Schedules by Region
Treatment strategies for the Asian citrus psyllid are different in various regions of the state depending on if the psyllid is well-established (requiring an area-wide management strategy) or is new to an area (requiring an eradication strategy). More details about eradication strategies and treatments can be found on the University of California’s website.
Below are the currently scheduled coordinated and area-wide treatments across the state. All dates and information are subject to change. For additional questions or information, contact your grower liaison about area-wide management and how to implement the recommended protocols.
Central Coast
- There are currently no treatments scheduled for this region.
Eradication – no area-wide treatment
The treatment windows for each PMA are listed below. PMA maps and other information are posted here.
Each organic treatment must consist of two applications applied 10-14 days apart. Double organic treatments are required because of their limited residual activity. The list of approved materials for both conventional and organic orchards is listed here.
Winter 2026 PMA Treatment Window
- Dec 29 – Jan 19 V-5, V-6, V-31, V-32, V-34, V-35
- Jan 5 – Jan 26 V-7, V-8, V-24, V-25, V-29, V-30
- Jan 12 – Feb 2 V-3, V-4, V-9, V-23, V-27, V-28, V-33 V-44, V-45, V-46, V-47, V-48, V-49, V-50
- Jan 19 – Feb 9 V-1, V-2, V-16, V-21, V-22, V-26
- Jan 26 – Feb 16 V-15, V-18, V-19, V-20, V-42, V-43
- Feb 2 – Feb 23 V-10, V-13, V-14, V-37, V-38, V-39
- Feb 9 – Mar 2 V-11, V-12, V-17, V-36, V-40, V-41
Please treat as close to your window as possible, and as early as you can within each window, especially during the Fall Treatment period. Work with a PCA if you have one, to optimize ACP management in your orchard. If you need a PCA or applicator referral, please contact one of the grower liaisons listed below. It is understood that weather, equipment availability, or other field conditions may unexpectedly affect treatment timing. It will be up to the growers to work with their PCAs and applicators to schedule treatments.
Southern California
Conventional Applications:
- One application to be performed within treatment dates of January 5th through January 25th.
- Approved conventional materials include:
- Fenpropathrin (Danitol 2.4 EC) Rate 16-21.33 fl oz/acre
- Beta-Cyfluthrin (Baythroid XL) Rate 3.2-6.4 fl oz/acre
- Cyfluthrin (Tombstone) Rate 2.0-3.2 fl oz/acre
- Fenpyroximate (Fujimite SC) Rate 2-4 pt/acre
- Flupyradifurone (Sivanto Prime) Rate 10.5-14 fl oz/acre
- The District requires that you conduct your applications via ground, at 100-200 gallons per acre. In the event that you cannot comply with defined protocols, the District may grant waivers with the written approval of the ICCPCD Manager.
Organic Applications:
- The 1st application needs to be performed between December 29th and January 11th.
- The 2nd application should be applied 10 to 14 days after your first application.
- Approved organic material options include:
- Spinosad (Entrust SC) Rate 9-10 fl oz/acre (IC)** Plus oil or a similar organic adjuvant/surfactant
- Pyrethrins (PyGanic EC5.0II) Rate 15.61 fl oz/acre (IC) Plus oil or a similar organic adjuvant/surfactant
- Narrow Range Oil (415, 435, 440) Rate 1% (IC)**
Following the advice of the leading citrus researchers in the country, the District is recommending that both conventional and organic applicators spray the perimeter of your grove(s) first. The District recommends night spraying as research indicates that there is more efficacy in controlling ACP when spraying at night.
** IC – Intermediate coverage uses 250-to-600-gal water/acre.
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Winter 2026 ACP Area-Wide Treatment Schedule for San Diego County:
- San Diego citrus outside the pest control district (PCD): January 12-26
- Pauma and San Pasqual Valley (mandatory in the PCD): January 12-26
- Anza Borrego (mandatory in the PCD): January 19 – February 2
*Organic operations require 2 applications within 10 days for effective ACP control due to the shorter residual efficacy of organic materials.
The University of California (UC) strongly recommends properties with citrus to participate in ACP area-wide treatments for Asian citrus psyllid (ACP) in regions like San Diego County, where the ACP pest is well established.
Coordinated treatments across neighboring citrus are the most effective way to keep ACP populations low and reduce the risk of ACP transmitting and spreading a deadly and incurable citrus disease called Huanglongbing (HLB). To support this science-based recommendation, treatment with an effective ACP product is MANDATORY within pest control district boundaries. Areas outside of district boundaries are strongly encouraged to participate in coordinated treatments. UC provides a list of ACP-effective materials and best management practices for citrus.