烟盲蝽对温室白粉虱和小菜蛾捕食作用研究

Predation of Nesidiocoris tenuis to Trialeurodes vaporariorum and Plutella xylostella

为了测定烟盲蝽对温室白粉虱成虫、卵和小菜蛾二龄幼虫、卵的捕食作用,在室内条件下,研究了烟盲蝽对温室白粉虱成虫、卵和小菜蛾二龄幼虫、卵的捕食作用并进行了定量研究。结果表明:烟盲蝽对猎物的捕食功能反应均符合Holling II型,对白粉虱成虫、卵和小菜蛾二龄幼虫、卵理论最大日捕食量分别为62、112、74、101头,烟盲蝽对白粉虱卵和小菜蛾卵的捕食量大于对白粉虱成虫和小菜蛾二龄幼虫的捕食量;烟盲蝽的寻找效应随着自身密度的增加而下降,烟盲蝽与猎物的个体间存在着较大的干扰,烟盲蝽和猎物的相互干扰作用的关系均可用Hassell模型模拟。

The predation of Nesidiocoris tenuis （Reuter） on the adults and eggs of Trialeurodes vaporariorum as well as on the eggs and second instar larva of Plutella xylostella was quantitatively in- vestigated in the laboratory. Results indicated that all the functional responses of N. tenuis to preys belonged to a Holling Ⅱ Type. The maximum predatory daily amount for N. tenuis to the eggs of T. vaporariorum and to the eggs and second instar larva of P. xylostella was 62, 112, 74, 101 individuals, respectively. That of N. tenuis to the eggs of T. vaporariorum and P. xylostella was higher than the adults of T. vaporariorum and second instar larva of P. xylostella. The searching efficiency decreased with the increase of predator density. N. tenuis and preys had interference problems, whose relationship may be described by Hassell model.