草间小黑蛛对柏小爪螨控制作用的研究

Study on Predatory Process of Erigonidium Graminicolum to Oligonychus Perditus

草间小黑蛛成蛛对柏小爪螨雌成螨的捕食功能反应属HollingII型.对柏小爪螨各螨态的控制能力从到大依次为:成螨>若螨>幼螨.草间小黑蛛对柏小爪螨的寻找效应(S)随猎物(Nt)和天敌密度的增加而降低.草间小黑蛛的饥饿程度、生境大小等因素均可引起功能反应参数的变化.草间小黑蛛成蛛喜食柏小爪螨的成螨和若螨,对幼螨的捕食能力较弱.

The functional response of the adult Erigonidium graminicolum to the adult female Oligonychus perditus belongs to Holling II type.The order of the controlling abilities of E.graminicolum to O·perditus is as follows: adult>nymph>larvae ,the searching efficiency of E.graminicolum to O.perditus declines with the increasing of the prey density (Nt) and the predator density(P).The length of E.graminicolum being starved and the size of habitat could lead to the change of the parameters of the functional responses. the adult E.graminicolum more liked predating the adults and nymphs of O.perditus than the larvaes.