The most effective treatment for ACP is a combination of Tempo (cyfluthrin) spray combined with a soil drench of systemic Merit (imidacloprid) applied by a licensed applicator.
Homeowners can apply their own foliar sprays (Sevin, Malathion) when psyllids are observed. Softer foliar insecticide options include horticultural oils and insecticidal soaps. However, these products must make direct contact with psyllids to kill them and the residues are short lived, so they must be applied more frequently.
Homeowners can also apply systemic imidacloprid (Bayer Advanced Fruit, Citrus & Vegetable). This soil drench should be applied during summer or fall when roots are active.
|Type of treatment||Pesticide Name||
Effectiveness against ACP
Duration of control
|Professional treatment||Tempo & Merit||High||Months||
Foliar: when psyllids are present
|Homeowner-applied broad-spectrum foliars||Sevin, Malathion||Moderate||Weeks||When psyllids are observed|
|Homeowner-applied soil drench||Bayer Advanced Fruit, Citrus & Vegetable||Moderate||Months||When psyllids are observed in summer or fall|
|Homeowner-applied soft foliars||Insecticidal soaps, oils and pyrethrins||Low to moderate||Days||Every 7-10 days during *leaf flushing|
*Flushing: when new leaves are first developing until they expand and harden
- always follow label instructions for the safe and effective use of the product
- only apply pesticides if psyllids have been observed or are known to be in your neighborhood
- only apply insecticides to host plants of psyllids (citrus and closely related hosts)
- avoid using insecticides during blooming periods to limit impacts on bees
- good coverage, including undersides of leaves, is important for foliar sprays
- If Tamarixia wasps have been released near your home, then use the soft insecticides (oils and soaps) that are safer for the Tamaraxia and be sure and control ants (UC IPM guidelines for ant control).