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
Fall 2022 Treatment:
- Beginning September 4, 2022
- The Fall coordinated area wide grower treatment window has begun. All commercial citrus growers and property owners with 25 or more citrus trees are asked to treat for ACP, to reduce populations and minimize the risk of HLB for everyone.
Eradication – no area-wide treatment
Summer 2023:
- May 1 – May 29: V-5, V-6, V-31, V-32, V-34, V-35
- May 22 – Jun 19: V-7, V-8, V-24, V-25, V-29, V-30
- Jun 12 – Jul 10: 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 3 – Jul 31: V-1, V-2, V-16, V-21, V-22, V-26
- Jul 24 – Aug 21: V-15, V-18, V-19, V-20, V-42, V-43
- Aug 14 – Sep 11: V-10, V-13, V-14, V-37, V-38, V-39
- Sep 4 – Oct 2: V-11, V-12, V-17, V-36, V-40, V-41
Central Valley
Eradication – no area-wide treatment
Fall 2022:
- The Kern County ACP/HLB Task Force is recommending growers treat commercial orchards between mid-August and mid-September.
Eradication – no area-wide treatment
Eradication – no area-wide treatment
Eradication – no area-wide treatment
Southern California
Fall 2022:
- September 18, 2022 – October 23, 2022
- All conventional acres will be required to make a systemic chemigation application of Imidachlopyrid, Platinum or Verimark between September 18th and October 23rd. Organic acres will need to apply two (2) foliar treatments between 10 and 14 days apart with a treatment window of October 1st to October 30th.
- The exact dates of the 2-week treatment window target will be coordinated with the members of each growing zone.
2023 ACP Treatment Schedule*
- Spring Treatment – May 15 – June 30
- Summer Treatment – July 1 - August 31
- Fall Treatment – October 1 – November 15
- Winter Treatment – November 16 – December 31
*Note: The dates above are for non-Pest Control District areas. If your operations are in a PCD, your PCD Manager will provide the ACP treatment schedule.
2023 ACP Treatment Schedule
- Spring Treatment – May 15 – June 30
- Summer Treatment – July 1 – August 31
- Fall Treatment – October 1 – November 15
- Winter Treatment – November 16 – December 31
Summer 2023:
- San Diego Citrus (outside the Pest Control District (PCD)) - June 12 - June 25
- Pauma Valley and San Pasqual Valley (mandatory in the PCD) - June 12 - June 25
- Anza Borrego – No treatments required
*Organic operations must do 2 applications within 10 days of each other with at least one application within the treatment window.