モモシンクイガの合成性フェロモンおよびその関連化合物の生物活性

抄録

Active components of the sex pheromone of the peach fruit moth, Carposina niponensis WALSINGHAM, have been isolated and identified as (Z)-7-eicosen-11-one and (Z) or (E)-7-nonadecen-11-one. Therefore, sex-pheromone activities of 7-alken-11-ones of carbon numbers 17∼23 were evaluated with an electroantennogram (EAG), field trapping, and laboratory tests of sexual stimulation. On the EAG, the male antenna of peach fruit moth was more sensitive to each (Z)-isomer than to the corresponding (E)-isomer. Among the 12 homologues, (Z)-7-eicosen-11-one wasconfirmed to be most active, followed by (Z)-7-nonadecen-11-one. On field trapping, the activity as attractant for males was confirmed only for (Z)-isomers of 17∼20 carbon homologues. Of these, (Z)-7-eicosen-11-one (A) and (Z)-7-nonadecen-11-one (B) were conspicuously attractive. Furthermore, the activity was synergistically enhanced by mixing the two compounds at the ratio of 20:1 for A to B. This synergistic action of the two compounds was also confirmed in sexual stimulation under the laboratory conditions. These results confirm that (Z)-7-eicosen-11-one and (Z)-7-nonadecen-11-one are the major and the minor components, respectively, of the female sex pheromone of the peach fruit moth.