ISOLATION AND IDENTIFICATION OF SEX-PHEROMONE OF SYMMETRISCHEMA-TANGOLIAS (GYEN) (LEPIDOPTERA, GELECHIIDAE)

The sex pheromone of the South American potato tuber moth Symmetrische nna tangolias (syn.: Symmetrischema plaesiosema) was identified as a 2 :1 mixture of (E,Z)-3,7-tetradecadien-1-ol acetate and (E)9-tetradecen -1-ol acetate by means of dual-column GC, EAG, GC-EAD, CC-MS, NMR, and wind-tunnel bioassays. (Z)-5-Tetradecen-1-ol acetate and (Z)-7-tetrad ecen-1-ol acetate were also identified in the pheromone gland extract. Male S. tangolias were able to detect these acetates (EAG), but their addition to the two-component sex pheromone did not improve attractiv eness. Field trials in Cajamarca and Cusco, Peru, showed that traps ba ited with the synthetic sex pheromone were able to catch large numbers of male S. tangolias.