智利小植绥螨对朱砂叶螨的捕食效能

摘要

The predation efficiency of Phytoseiulus persimilis to egg, nymph and adult of Tetranychus cin-nabarinu was studied in laboratory. The distribution density of Tetranychus cinnabarinu played an important role on the predation efficiency. The predation rate increased firstly with the increase of distribution density of Tetranychus cinnabarinu, but decreased after the density of Tetranychus cinnabarinu reached the critical value. The predation rate was the highest when the density of egg, nymph and adult of Tetranychus cinnabarinu was 80, 30 and 10 per leaf disc respectively.%在实验室条件下研究了智利小植绥螨雌成螨对朱砂叶螨卵、幼螨和成螨的捕食效能.结果表明:朱砂叶螨各螨态不同密度分布情况对智利小植绥螨的捕食效能有一定的影响,在一定范围内,当害螨各螨态分布密度增加,智利小植绥螨的捕食量随之增加,但当增加到一定程度后,智利小植绥螨的捕食量又随密度的增加而减少.试验以朱砂叶螨卵密度为80粒/叶碟、若螨密度30头/叶碟、成螨密度10头/叶碟时,智利小植绥螨的捕食量最多.