Table 2.

Flight responses of virgin male A. ipsilon to heptanal and the pheromone in a wind tunnel.

Stimulus	Number of males	Activation	Taking off	Partial flight	Source flight
Pheromone	50	100	96.0	92.0	34.0
0.1% heptanal	26	84.6	76.9	61.5	0.0
1% heptanal	24	91.7	79.2	75.0	0.0
Control	50	78.0	56.0	50.0	0.0

Data are the percentages of four behavioral items carried out within 90 s.