Asian Citrus Psyllid Distribution and Management
University of California
Asian Citrus Psyllid Distribution and Management

San Diego

The strategy for all regions is to minimize the number of extra pesticide treatments applied for ACP in order to preserve IPM programs and reduce the risk of resistance. 

San Diego area-wide program: ACP is well established in San Diego County.  The area-wide program for this region consists of a coordinated application in late winter to kill overwintering adults and to protect spring flush and a coordinated fall treatment to protect the fall flush.  Additional grower choice treatments are encouraged in between coordinated treatments. Whenever treating for another pest, choose a pesticide that will also control ACP. For example, the Fujimite, Movento, Delegate, Sevin and Lorsban treatments (shown in red) applied for common pests would assist with ACP control.

Special Notes for San Diego Growers

  • The goal is to suppress psyllids below 0.5 nymph/flush.
  • Urban areas are infested with ACP and can be a source of psyllids for groves.
  • If sampling demonstrates psyllid populations are increasing ahead of the timing of the coordinated treatment, then apply a full orchard or border spray (if psyllids are only found on the borders) in addition to the coordinated treatment.

Common Treatments for San Diego Citrus Pests

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