Attractant pheromone for male rice bug,Leptocorisa chinensis: Semiochemicals produced by both male and female.

GC profiles of the airborne volatiles produced by adult males and females of the rice bug,L. chinensis showed no qualitative chemical dimorphism. However, GC-EAD experiments showed that eight of the compounds elicited strong responses in male and female antennae. Ruling out alarm pheromone and compounds that were not found in the whole-body extracts of the bugs, four compounds remained to be tested as possible attractants. In field experiments, the whole mixture or tertiary blends were not attractive: however, males were strongly attracted to a 5 : 1 mixture of 2-(E)-octenyl acetate and octanol. The attractancy of the binary mixture was decreased by the addition of 3-(Z)-octenyl actetate. Although the binary lure specifically attracted males, there was no evidence that it triggered any response of sexual behavior in males.