Evidence for cis-11-hexadecen-1-ol acetate as a major component of the sex pheromone of the bertha armyworm, Mamestra configurata (Lepidoptera: Noctuidae).
A potent sex pheromone produced by females of Mamestra configurata Wlk. was isolated in investigations in Saskatchewan in 1973. Chemical degradative and gas liquid chromatographic (GLC) retention data indicated that it was an unsaturated alkenyl acetate with 15 carbon atoms. The location and configuration of the double bond was determined from the electroantennal responses of males to a series of cis and trans mono-unsaturated alken-l-yl acetates, of which cis-11-hexadecenyl acetate elicited the greatest response. The GLC retention times of the purified insect sex pheromone corresponded exactly with those of authentic cis-11-hexadecenyl acetate on several analytical columns. The maximum biological response in laboratory experiments in which males were exposed to synthetic materials was obtained from a mixture of approximately 8.5% cis- and 15% trans-11-hexadecenyl acetates.