A Sex Attractant for the European Fir Budworm Moth, Choristoneura murinana

Pheromones, Sex Attractant, (Z)-9-dodecenyl Acetate, Olfactory Receptors, Choristoneura muri­ nana, Tortricidae Traps baited with 100 ^g (Z)-9-dodecenyl acetate and 10|ig (Z)-ll-tetradecenyl acetate are highly effective in attracting C. murinana males at varying population densities. The attractive mixture was established by electrophysiological and Field screening studies combined with chemical analysis of the female pheromone secretion. (Z)-9-dodecenyl acetate is a major constituent in washes of pheromone glands of calling C. murinana females. This compound, the first dodecenyl ester pheromone known for a species of the Archipini tribe, is moderately attractive on its own at low doses. Attraction is strongly synergized by 10% (Z)-ll-tetradecenyl acetate but is inhibited by small amounts of (Z)-9tetradecenyl acetate. Each o f the three compounds acts upon a separate type of receptor cell in hair sensilla of the male antenna.