Abstract
From laboratory and field experiments the male behavioural response to the female Spodoptera litura sex pheromone was obtained over a range of wind velocities. The male response of interest here is the maximum distance at which incipient movement toward the source occurs. In the windless laboratory, males responded to the pheromone only within a short distance of the source. In the firld, the maximum distance for incipient male movement increased with an increase in wind velocity until a maximum was reached at a wind velocity of 1.0 m/sec. Males displayed a different behaviour to each component of the sex phermone. Cis-9, trans-11-tetradecadienyl acetate emitted by virgin females, resulted in incipient movement at greater distances than did cis-9, trans-12-tetradecadienyl acetate.
