Fig. 1

Temperature affects the survival of female Anopheles arabiensis exposed to deltamethrin. a In the unselected An. arabiensis strain, SENN, deltamethrin displayed a consistently negative temperature coefficient, its toxicity decreasing with increasing temperature. b SENN-DDT females, however, are more likely to survive deltamethrin exposure under standard insectary conditions; the probability of dying increased at both the lower and higher temperatures. PBO pre-exposure completely restored susceptibility to deltamethrin