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KAC Citrus Entomology
University of California
KAC Citrus Entomology

San Diego Region

ACP Treatment Strategy

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

Year-round suppression program: Once ACP is established, treatments continue year-round with the goal of suppressing ACP. Whenever you treat for another pest, choose a pesticide that will also control ACP.  For example, in San Diego primary pests include bud mite, citrus red mite, mealybug, black scale, ants and California red scale.  Agri-Mek, Losban and Sevin (shown in red) are insecticides applied for these pests that would assist with ACP control. 

Highlighted in yellow are critical treatments applied for ACP at times of year that may not be covered by treatments for other pests.  Insecticides are not normally applied during the periods of late fall and early spring.  But these treatment timings have been shown to have a very strong impact on ACP populations because they attack ACP as it goes into overwintering and as it comes out of overwintering.  Thus, these are important treatment additions.   A late fall Lorsban budmite treatment would be helpful for reducing overwintering psyllids. Pyrethroids are most effective in cold weather and function well in early spring just prior to first flush. The best timing for an imidacloprid treatment is summer, to assist with controlling the nymphs in the fall flush.


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