Males ofPectinophora scutigera(Hold.) were captured in traps baited withZ,Z,7,11- hexadecadienyl acetate. Catches were reduced when the level ofZ,Eisomer present exceeded 50%.P. endemaCommon andP. gossypiella(Saund.) were attracted to 1:0.5 and 1:1 blends of theZ,ZandZ,Eisomers respectively.