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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

  • The latest coordinated Area Wide ACP Treatment Window for Santa Barbara County citrus is September 15 – October 12, 2024, or as close to this window as possible. Degree day modeling and field observations suggest ACP populations are increasing in the Santa Barbara area. If your citrus has not already been treated recently, please treat within this time frame or as close to it as possible. If you can, work with a pest management professional to monitor your citrus for ACP and apply ACP-effective materials when ACP is present and when treating for other pests, if possible. Ant control is also important, as ants protect ACP from natural enemies.

Eradication – no area-wide treatment

The annual ACP area-wide management (AWM) treatment protocol for 2024-2025 consists of three applications: a summer, fall, and winter AWM treatment.

Summer 2024 PMA Treatment Window

  • Apr 29 – May 27 V-5, V-6, V-31, V-32, V-34, V-35
  • May 20 – Jun 17 V-7, V-8, V-24, V-25, V-29, V-30
  • Jun 10 – Jul 8 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
  • Jul 1 – Jul 29 V-1, V-2, V-16, V-21, V-22, V-26
  • Jul 22 – Aug 19 V-15, V-18, V-19, V-20, V-42, V-43
  • Aug 12 – Sep 9 V-10, V-13, V-14, V-37, V-38, V-39
  • Sep 2 – Sep 30 V-11, V-12, V-17, V-36, V-40, V-41

Fall 2024 PMA Treatment Window

  • Sep 30 – Oct 21 V-5, V-6, V-31, V-32, V-34, V-35
  • Oct 7 – Oct 28 V-7, V-8, V-24, V-25, V-29, V-30
  • Oct 14 – Nov 4 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
  • Oct 21 – Nov 11 V-1, V-2, V-16, V-21, V-22, V-26
  • Oct 28 – Nov 18 V-15, V-18, V-19, V-20, V-42, V-43
  • Nov 4 – Nov 25 V-10, V-13, V-14, V-37, V-38, V-39
  • Nov 18 – Dec 9 V-11, V-12, V-17, V-36, V-40, V-41

Winter 2025 PMA Treatment Window

  • Dec 30 – Jan 20 V-5, V-6, V-31, V-32, V-34, V-35
  • Jan 6 – Jan 27 V-7, V-8, V-24, V-25, V-29, V-30
  • Jan 13 – Feb 3 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 20 – Feb 10 V-1, V-2, V-16, V-21, V-22, V-26
  • Jan 27 – Feb 17 V-15, V-18, V-19, V-20, V-42, V-43
  • Feb 3 – Feb 24 V-10, V-13, V-14, V-37, V-38, V-39
  • Feb 10 – Mar 3 V-11, V-12, V-17, V-36, V-40, V-41

Central Valley

Eradication – no area-wide treatment

Growers are encouraged to contact the local Kern County Grower Liaison with questions.

Eradication – no area-wide treatment

Eradication – no area-wide treatment

Eradication – no area-wide treatment

Southern California

Check back later for more details.

Riverside County 2024 ACP Treatment Schedule (outside the PCD)

  • Spring Treatment – Apr. 29-May 24, 2024
  • Summer Treatment* – Jul. 1-Aug. 2, 2024
  • Fall Treatment – Oct. 7-Nov. 1, 2024
  • Winter Treatment – Nov. 18-Dec. 20, 2024

*May be a perimeter spray if scouted and determined that the center has no ACP

San Bernardino County 2024 ACP Treatment Schedule

  • Spring Treatment – Apr. 29-May 24, 2024
  • Summer Treatment* – Jul. 1-Aug. 2, 2024
  • Fall Treatment – Oct. 7-Nov. 1, 2024
  • Winter Treatment – Nov. 18-Dec. 20, 2024

*May be a perimeter spray if scouted and determined that the center has no ACP

Fall 2024 ACP Areawide Treatment Schedule for San Diego County:

  • Pauma Valley and San Pasqual Valley - August 26 to September 9
  • Borrego - Systemic: September 2-16, Foliar: October 1-15

*Organic operations must do 2 applications within 10 days of each other with at least one application within the treatment window.

Treatment with an effective ACP product is MANDATORY within pest control district boundaries. Areas outside of district boundaries are strongly encouraged to participate in the coordinated treatments to aid in the effectiveness of the treatment strategy. Studies indicate a treatment rate of 90% or more is necessary for area wide effectiveness. In addition, pest control district zones that reach 90% will also receive residential citrus treatments conducted by CDFA.

The district will begin enforcing treatments in the near future in order to ensure an area wide rate greater than 90% of planted commercial citrus acreage. See website for a full copy of the enforcement ordinance.