The effect of spraying a mixture of the insect growth regulator (IGR) pyriproxyfen (1 mg/liter) and either 1% boric acid sugar bait or eugenol sugar bait on croton petra plants (Codiaeum variegatum L.) was evaluated against the container-inhabiting mosquito, Aedes albopictus (Skuse). Treatments were applied to plants and evaluated against adult and larval Ae. albopictus in the laboratory through contact and wash off experiments, respectively. The control treatment lacked an active ingredient and were treated with an attractive sugar bait. The plants treated with attractive toxic sugar baits plus the IGR resulted in 60–100% mortality of laboratory-reared adult Ae. albopictus. The pyriproxyfen solutions collected from the plant wash experiment resulted in 80–100% emergence inhibition to the exposed third- and fourth-instar larvae, compared with the untreated control. Attractive toxic sugar baits mixed with the IGR not only provide effective control of adult mosquitoes, but also provide additional control of larval mosquitoes after being washed off from the treated plants.
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Vol. 51 • No. 4