智利小植绥螨对土耳其斯坦叶螨的捕食效能评价

Functional of Phytoseiulus persimilis to predation of Tetranychus turkestani Ugarov et Nikolski

采用室内观察的方法,用HollingⅡ型圆盘方程进行拟合,研究了智利小植绥螨雌成螨和若螨在不同的温度下对土耳其斯坦叶螨成螨的功能反应,以及智利小植绥螨个体之间捕食的干扰反应,为智利小植绥螨人工繁殖以及在田间释放提供理论依据。结果表明,各个温度下智利小植绥螨雌成螨和若螨对土耳其斯坦叶螨成螨的反应均属于HollingⅡ型。智利小植绥螨雌成螨和若螨对土耳其斯坦叶螨成螨的最大捕食量分别为16.13头/d和1.07头/d,瞬时攻击系数分别为:0.801和0.115,捕食能力(a/Th值)随温度的升高而增大,27℃达到最大;研究发现在土耳其斯坦叶螨密度一定时,智利小植绥螨个体之间存在干扰和竞争作用,平均捕食量随着捕食螨密度的增加而减小。在防治土耳其斯坦叶螨的过程中,应考虑智利小植绥螨雌成螨和若螨的捕食能力差别以及其自身存在的干扰作用,以混合螨态进行田间释放,以达到持续防治土耳其斯坦叶螨的效果。

By the observation in room, the experimental results were fitted with Holling H model patter.. The purpose of the research on the functional response of female mite and the deutonymphs of Phytoseiulus persimilis to predation of Tetranychus turkestani and the functional response of the density of P. persimilis to provide theoretical and practical basis for the application of P. persimilis. The results indicated that each temperature all belong to Holling 11 model patter. The result shows that the maximum predation capacity of female mite and the deutonymphs of P. persimilis are 16. 13 and 1.07, the instantaneous attack rates are 0. 801 and 0. 115. The predation ability （ a/Th value ） increase with temperature arise, the maximum temperature is 27~C; The research of the functional response of the density of predator, Preying of female P. persimilis to the female T. turkestani decreased with the increase of population density of female P. persimilis. In order to in order to achieve continuous control of T. turkestani, considered female mite and the deutonymphs of P. persimilis predation ability difference and the functional response of the density of P. persimilis, we should release with mixed state.