Figure 1. Response of female P. viteana to doubling the ratio of a single volatile constituent.
Flight responses (% ±1 SE) of female P. viteana (N = 241) in the flight tunnel to hexane control, 7-component “optimized blend”, and six ratio-modified synthetic blends. Ratio modification was done systematically by doubling one compound in the optimized blend singly and is indicated by “x2” in the figure legend. Partial upwind flight was recorded when P. viteana made more than 50 cm of zig-zag upwind flight toward the target. Full upwind flight was the upwind flight to within 10 cm of the target. An average of 30 individual moths was flown to each target tested. tDMNT: 4,8-dimethyl-1,3(E),7-nonatriene.
