Fig. 4.

a Percentage of Culex pipiens flying upwind in a dual-choice flight olfactometer in response to a three-component blend, consisting of benzaldehyde, (E)-2-nonenal, and phenylacetaldehyde; *** P < 0.001 by chi-squared test. b Percentage of C. pipiens flying upwind in response to the full (six-component) and minimal (three-component) synthetic blends of A. syriaca floral odor. NS = no significant difference