Screenhouse mosquito catches in traps baited with synthetic blends. Estimated mean proportion (GLM) of mosquitoes caught in a screenhouse using MM-X traps without (strips only) and with CO2 (control) or with CO2 plus synthetic blends. Error bars represent the standard error of the mean. Numbers in the bars indicate number of mosquitoes caught. For each mosquito species: different letters indicate significant differences between treatments (P < 0.05, GLM).