Fig. 4

Mean number of wild female mosquitoes caught indoors in MM-X traps with no bait or in a trap baited with either CO₂ alone, 2-butanone (99.5%) alone, MB5, MB5 + CO₂, or MB5 + 2-butanone (99.5%). Error bars denote the standard error of the mean number of mosquitoes trapped. Bars with different letters within a given mosquito species denote significant differences in the number of mosquitoes trapped. No An. funestus were caught with the unbaited trap