Fig 2. Mortality rates of adult A. albopictus from Cameroon (8 locations) 24 hrs after exposure to insecticides alone or with 1 h pre-exposure to synergist.

a, Edéa; b, Buea; c, Bafang; d, Bamenda; e, Mbalmayo; f, Melong; g, Kribi; h, Tibati. Error bars represent standard error of the mean (SEM). DDT, Dichlorodiphenyltrichloroethane. PBO, Piperonyl butoxide. DEM, Diethyl maleate.