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通过室内饲养与野外观察榆木蠹蛾Holcocerus vicarius(Walker)成虫的羽化、交尾、产卵行为,触角电位反应测定处女雌蛾性信息素产生与释放节律,旨在为榆木蠹蛾性信息素的鉴定和合成奠定基础。结果表明:榆木蠹蛾羽化行为全天可见,主要集中在15:00-19:00。成虫羽化当日即可交尾,21:30-0:30进行婚飞和交尾,交尾高峰出现在晚23:00左右,光期未见交尾。随着日龄的增加,召唤时间前移并且延长,2～3日龄处女雌蛾召唤时间早于1日龄雌蛾,交尾时间较短;雌蛾在羽化1d后达到性成熟,2日龄雌蛾交尾百分率最高,达41.8%。雌蛾将产卵器伸出寻找缝隙处产卵,分多处产卵,雌虫最高产卵量达720粒,最低产卵量为105粒,卵期为12～22d不等,孵化率为72%～88%。羽化当晚的雌蛾体内性信息素含量较低,第2天最高,以后逐日下降;2日龄榆木蠹蛾处女雌蛾性信息素的产生量从晚17:00起逐渐增加,21:30-22:00时最高,22:00后逐渐减小。雄蛾触角电位反应在22:30最强。21:30-23:00是雌蛾产生和释放性信息素的高峰期。榆木蠹蛾的羽化、交尾存在一定的时辰节律,通过处女雌蛾的野外诱集试验证实了性信息素释放与交配行为在时辰节律上的一致性。
The sex pheromone production and release rhythms of virgin female moths were determined by indoor feeding and field observation of eclosion, mating, oviposition and antennae responses of adults Holcocerus vicarius (Walker) The identification and synthesis of the foundation. The results showed that the eclosion behavior of Erigeron molitor was visible all day, mainly in 15: 00-19: 00. Adult mating day can be done on the same day, 21: 30-0: 30 wedding fly and mating, the intersection of the peak appeared at about 23:00 late, no light period of mating. With the increase of age, the summon time moved forward and lengthened. The call of female virgins was earlier than that of 1-day-old female at 2 ~ 3 days old, and the mating time was short. The female reached sexual maturity on day 1 Female moths had the highest percentage of mating, reaching 41.8%. The female moth extended the ovipositor to find the gap to lay eggs and lay eggs at many places. The maximum fecundity of females was 720 grains, the minimum fecundity was 105 grains and the egg period was 12-22 days. The hatching rate was 72% ~ 88%. Sexual pheromone content in female eclosion night was lower, highest on the second day, and then decreased on a daily basis. The sex pheromone production of virgin female moth on the 2nd instar increased gradually from 17:00 to 21:30 The highest at -22: 00 and the second at 22: 00. The male antennae response was the strongest at 22:30. 21: 30-23: 00 is the peak of female pheromone production and release of pheromones. There was some timing rhythm in eclosion and mating of the elm moth, which was confirmed by the field trapping test of virgin female moths.