Figure 2. Permethrin sensitivity.

Mean (± SEM) proportional mortality of uninfected insecticide-resistant mosquitoes from the laboratory (left) and field population (right) 24 hrs after permethrin-exposure. White bars represent permethrin-induced mortality of 3-day old mosquitoes exposed once on day 0. Grey bars show mortality of 6-day old mosquitoes exposed once on day 3. Black bars show permethrin-induced mortality after a second exposure on day 3 of 6-day old mosquitoes that had survived a first exposure on day 0. From left to right, data depict 10, 5, 5, 8, 4, and 4 replicate groups of 28 females, with significant differences in group means indicated by non-corresponding letters.