斜纹夜蛾在风洞中对性信息素的行为反应及田间诱捕试验

雌蛾腺体内含量最高的组份9,11-14∶Ac（A）在风洞中能引起雄蛾从搜索气迹、定向飞行到撒开味刷企图交尾连续的行为反应，而雌蛾腺体内其它组份单独使用时均不能引起雄蛾上述行为反应。一定量的Z9,E12-14∶Ac（B）对A的活性有增效作用，诱芯中B数量过多，不但失去对A的活性增效作用，还对雄蛾接近诱芯和企图交尾有强烈的抑制作用。9-14∶Ac（C）与11-14∶Ac (D)对雄蛾的定向行为无影响，诱芯中含有50%的C时，反而对雄蛾接近诱芯和企图交尾有抑制作用。A与B在滤纸诱芯中的含量比例与诱芯释放的挥发物比例明显不同，从9∶1（A∶B）诱芯释放的挥发物比例更接近于雌蛾腺体内的天然比例。田间诱捕试验中两组份诱芯的诱捕量随两组份比例不同而变化， 9∶1（A∶B）诱芯的诱捕量最大，1∶1（A∶B）诱芯的诱捕量低于单一的A组份诱芯。

The behavioral responses of Spodoptera litura (F.) males to the female sex pheromone in wind tunnel and field trapping tests

The major component of the sex pheromone of S. litura (F.) female, Z9, E11-14∶Ac(A), elicited all steps of the male behavioral sequence, i. e., searching for the odor, oriented upwind flight, approaching the source and displaying hairpencils. No males showed oriented flight when Z9, E12-14∶Ac (B), Z9-14∶Ac©, E11-14∶Ac (D) were assayed individually. Component B was able to enhance the activity of A, but larger amount of B in mixture strongly inhibited males from approaching the source and displaying hairpencils. The components of C and D had no effect on male behavior, but larger amount of C in a mixture of A and B inhibited males approaching the source and displaying hairpencils. There was a significant difference between the ratio of A to B in the filter paper lure and that in volatile from the filter paper lure. The ratio of A to B in volatile from the most effective lure in the wind tunnel was approximate to the natural ratio of A to B in the sex pheromone gland. In the field, the attractiveness of trap for male moths changed with the ratio of the components with most males being caught in traps baited with a ratio of 9∶1(A∶B). The attractiveness of traps with ratios of 1∶1(A∶B) was lower than the attractiveness of traps baited with single component A.