烟盲蝽对斜纹夜蛾捕食功能反应的初步研究

Preliminary Study on the Functional Responses of Cyrtopeltis tenuis to Spodoptera litura

通过严格的室内试验，测定了烟盲蝽雌成虫、雄成虫和５龄若虫对斜纹夜蛾卵、１龄幼虫和２龄幼虫的捕食作用。结果表明，烟盲蝽对猎物的功能反应均呈ＨｏｌｉｎｇⅡ型。烟盲蝽３种虫态对猎物捕食能力的大小顺序为：雌成虫＞５龄若虫＞雄成虫。烟盲蝽雌成虫对猎物１龄幼虫的捕食效应随自身密度的增加而下降。个体间相互干扰对捕食效应有一定影响，随着捕食者和猎物密度的增加，干扰作用增强，雌成虫对１龄幼虫的捕食作用率显著下降，用Ｈａｓｓｅｌ方程模拟能够很好地反映这一变化规律。

The preying efficacies of Cyrtopeltis tenuis female, male, and fifth instar nymph to the eggs,first instar larvae,and second instar Iarvae of Spodoptera litura were determined through strict indoor experiment. The results indicated that all the functional responses of Cyrtopeltis tenuis to Spodoptera litura were showing a HollingⅡ Type. The three stages of Cyrtopeltis tenuis, from large to small according to their preying efficacies,were female,fifth instar nymph,and male. The preying efficacy of the female Cyrtopeltis tenuis to the first instar larvae of Spodoptera litura decreased as the population density of preyer increased.Interference between individuals had some effect on the prey efficacy. As the densities of the preyer and the prey increased,the interference effect increased, and the preying efficacy of the female Cyrtopeltis tenuis to the first instar larvae of Spodoptera litura decreased significantly. E=0.822 2P -1.215 0 , which was simulated from Hassell Equation,coorespond adequately with such variation.