We report results of susceptibility tests for Aedes taeniorhynchus from 2 localities of Yucatan State, Mexico, to different insecticides. The Centers for Disease Control and Prevention bottle bioassays were performed using the active ingredients of 3 pyrethroids, 2 organophosphates, and 1 carbamate: permethrin (15 μg/ml), deltamethrin (10 μg/ml), alpha-cypermethrin (10 μg/ml), malathion (50 μg/ml), chlorpyrifos (85 μg/ml), and bendiocarb (12.5 μg/ml). The mortality recorded at the diagnostic time of exposure (30 min) was 100% with all insecticides evaluated and for both populations. These results suggest complete susceptibility to the 3 chemical groups generally used for urban Ae. aegypti mosquito control.
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