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KAC Citrus Entomology
University of California
KAC Citrus Entomology

Long-term Management in Conventional Orchards

Psyllid Treatment Goals: The goal is to reduce psyllid densities to very low levels in order to slow the spread of psyllids to new areas and prevent them from finding HLB-infected trees. The long-term strategy is followed once the local eradication strategy is no longer effective. 

Manage Established Populations.  This strategy is followed once the psyllid is found in multiple sites, in multiple stages and is detected less than 9 months after the first application of insecticides.  A year-round areawide response that involves treating a minimum of three times a year with ACP effective insecticides is initiated.  Care should be taken to treat overwintering populations in late fall and early spring and new flushes.  Commercial citrus orchards and neighboring homeowners should be treated at the same time. Insecticides that are effective for ACP that are used for other pests assist with control. 

Manage Resistance. To avoid selecting for resistance in the psyllid, do not use an insecticide from any one mode of action number more than once a year for any insect. Insecticides in red are broad spectrum and have a greater effect and/or last longer than softer insecticides shown in green.


ACP Effective Treatments

The UC IPM Guidelines for Citrus and the UC ANR ACP Distribution and Management web site provide lists of insecticides that are effective against Asian citrus psyllid.

Regional Treatment Strategies

Because each California citrus growing region has its own set of pests and chemical strategies, we have worked with the growers and Pest Control Advisors to indicate typical treatments that would be effective against Asian citrus psyllid that would be applied for other pests.  The long-term management strategy integrates these 'normal' treatments with early spring and late fall treatments to manage Asian citrus psyllid.

The following California and Arizona regions have grower/PCA developed strategies:
San Diego, Ventura, Coachella Valley, Riverside, San Joaquin Valley, Yuma Arizona

(click the buttons on the left hand navigation bar to see the treatment strategies)

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