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叉角厉蝽Cahtheconidea furcellata是一种重要的捕食性天敌昆虫,为了探明该虫的捕食潜能,在室内条件下研究了叉角厉蝽成虫对斜纹夜蛾Spodoptera litura Fab.二龄和三龄幼虫的捕食作用和种内干扰作用。结果表明,叉角厉蝽成虫的捕食量随着斜纹夜蛾幼虫的密度增加而增大,其捕食功能反应符合HollingⅡ型方程。叉角厉蝽对斜纹夜蛾2龄幼虫的捕食量符合Na=0.7364N/(1+0.0118N),对斜纹夜蛾3龄幼虫的捕食量符合Na=0.7504N/(1+0.0005N),叉角厉蝽的捕食作用有较强的种内干扰反应,捕食率与个体间相互干扰的关系符合Hassell模型。叉角厉蝽的捕食量与害虫密度正相关,寻找效应与害虫密度负相关。
To investigate the predation potential of Cahtheconidea furcellata, an important predatory insects, Spodoptera litura Fab., Adult adults of Spodoptera litura, were studied in laboratory conditions. Second and third instar larvae Predation and intraspecific interference. The results showed that the predation amount of adult Lygus sonatus increased with the density of the Spodoptera litura larvae increasing. The predation functional response accorded with the Holling type Ⅱ equation. The prey on the 2nd instar larvae of Spodoptera litura was consistent with Na = 0.7364N / (1 + 0.0118N). The predation of 3rd instar larvae of Spodoptera litura was Na = 0.7504N / (1 + 0.0005N) Predatory function of the pronghorn had a strong intraspecific interference response, and the relationship between predation rate and individual interference was in accordance with the Hassell model. The predatory amount of prustifolia was positively correlated with the pest density, and the finding effect was negatively correlated with the pest density.