合成性诱剂对粘虫雄蛾的引诱活性

本文叙述合成性诱剂对粘虫Mythimna separata Walker雄蛾的引诱活性。在北京第二代粘虫发生期间的试验表明,顺—11—十六烯醛对粘虫雄蛾有很强的引诱活性。在顺—11—十六烯醛中加入少量顺—11—十六烯醇乙酸酯(1—10％),能显著地提高诱蛾活性。同时表明在日本活性很高的粘虫诱芯(顺—11—十六烯醇乙酸酯及顺—11—十六烯醇比例为8:1或9:1)在中国北方诱到的粘虫雄蛾数量极少。在中国北方第三代粘虫发生期,以顺—11—十六烯醛和顺—11—十六烯醇乙酸酯(9:1或9.5:0.5)为组分的诱芯对粘虫雄蛾也显示了较弱的引诱活性。

ATTRACTIVENESS OF SYNTHETIC SEX ATTRACTANTS TO THE MALE MOTHS OF ARMYWORM, MYTHIMNA SEPARATA WALKER

Field trapping tests of male moth of army worm,Mythimna separata Walker have shown that the attractant activity of the Z-11-hexadecenal was enhanced by the addition of 1-10% of Z-11-hexadecenyl acetate.The mixture of Z-11-hexadecenyl acetate and Z-11-hexadecenol (4 : 1 or 9: 1) proved to be attractive to the male moths of Pseudaletia separata Walker in Japan was less attractive to the male moths of Mythimna separata Walker in North China during the second flying season. Blend baited with Z-11-hexadecenal and Z-11-hexadecenyl acetate (9:1 or9.5: 0.5) showed less attractant activity to the male moths of army worm during third flying season in North China.The stage of the ovary development of the female moths captured by "poplar Shoot traps" and the number of the male moths captured by the synthetic sex attractants were sychronistic. When the ovaries of most female moths have been developed to the 3 rd and 4 th stage, the higher catch number of the male moths by the sex attractants was achieved.