| Abstrakt: |
When electroantennographic responses of maleYponomeuta malinellus Zeller to model compounds were determined at dosages of 0.3–30 ng, the strongest responses were obtained from (Z)-9-dodecen-1-ol acetate (Z9–12:Ac). Also, strong responses were obtained from (Z)-11-tetradecenal (Z11–14:A1) and (Z)-11-tetradecen-1-ol (Zl1–14:OH). At a dosage of 0.3 ng,Z11–14:A1 produced a stronger response thanZ11–14:OH, while at a dosage of 30 ng,Z11–14:OH andZ11–14:A1 produced equal responses. Gas chromatographic and mass spectral analysis of extracts of female sex pheromone glands showed the presence ofZ9–12:Ac, tetradecan-1-ol (14:OH), (E)-11-tetradecen-1-ol (E11–14:OH),Z11–14:OH, hexadecan-1-ol, and hexadecan-1-ol acetate in a ratio of 0.6:200:37:100:140:35. In field tests,Z9–12:Ac andZ11–14:OH together were required for trap catch, and addition ofZ11–14:A1,E11–14:OH, 14:OH, or (Z)-11-tetradecen-1-ol acetate did not increase catch. Ratios in rubber septa of 0.5:99.5 to 1.5:98.5 (Z9–12: Ac/Z11–14:OH) captured the most males and captures were statistically equivalent for dosages of 10–1000 µg/rubber septum. Traps baited with the synthetic lure produced better catches than those baited with females. |
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