Responses of A. gambiae to individual compounds added to a basic blend in an olfactometer.

Compounds were added in three concentrations (dilution 1∶100, 1∶1,000 or 1∶10,000) to the basic blend (ammonia, lactic acid, tetradecanoic acid) (basic blend + compound  =  Treatment) and tested against the basic blend (Control) alone in two series (A and B). N = number of mosquitoes released. Error bars represent standard errors of the mean; ***: χ2-test P<0.001; **: χ2-test P<0.01: *: χ2-test P<0.05.




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