交配和温度对甜菜夜蛾(Spodoptera exigua)雌蛾性信息素产生的影响

研究表明，交配对甜菜夜蛾雌蛾性信息素各组分的滴度，比例及其在个体间的变异均无显著的影响，因此交配不影响雌蛾在下一暗期的再次求和交配，环境温度对甜菜夜蛾性信息素的产生则有显著的影响，15－25℃最有利于甜菜夜蛾性信息素的产生，而10℃低温和35℃主温则使信息素产生受到明显影响，其中以10℃低温的影响更甚。10℃低温不仅使各组分的滴度产生显著改变，而且使二元性信息素组分的比例受到显著影响，并使二元组分通讯信息的个体间变异明显增大（CV＞10％），这些改变必半扰乱甜菜夜蛾雌雄间的正常交配。

Effects of mating experience and temperature on sex pheromone production of beet armyworm,Spodoptera exigua

Mating experience could not affect the production of sex pheromone in the female glands 24 h later, which meant that the beet armyworm females might call and mate again in next scotophase. This result explained the phenomenon why the beet armyworm could mate several times in their life under field conditions. On the contrary, ambient temperature greatly influenced the pheromone biosynthesis in the beet armyworm females. The optimal temperature for the biosynthesis of sex pheromone was between 15-25 degrees C. Under the temperature beyond this range, the biosynthesis of the pheromone components was disturbed in terms of absolute titers, proportions, and their CVs. The biosynthesis of component B was suppressed under 35 degrees C, and the proportion of A to B was significantly higher. In contrast, under 10 degrees C, the titer of A and the proportions of A to B were disturbed significantly, and the proportions of A in AB and AD binary blends changed significantly. Furthermore, the CVs of the ratios of A to B and A to D became larger than 10% under 10 degrees C.