A number of acetates of alcohols with a straight chain of 10–16 carbon atoms and a double or triple bond at the 9th or 11th position were synthesized. Their influence on the attractancy of the sex pheromones ofAdoxophyes orana(Fischer von Röslerstamm), a mixture ofcis-9-tetradecen-1-ol acetate (cis-9-tda) andcis-11-tetradecen-1-ol acetate (cis-11-tda), was investigated. The acetates of 9-dodecyn-1-ol, 9-tridecyn-1-ol, 9-tetradecyn-1-ol, 9-pentadecyn-1-ol, and 11-tetradecyn-1-ol had an inhibitory effect. Replacingcis-9-tda orcis-11-tda or both by a similar compound resulted in a mixture unattractive for the male insect. A series of 5 compounds which seemed to have a synergistic effect in 1972 trials was investigated more thoroughly together with 4 other compounds.