猎物和湿度对三种植绥螨生育的影响

本文报道了从国外引入的西方盲走螨(Metaseiulus occidentalis Nesbitt)、智利小植绥螨(Phytoseiulus Persimilis Athias-Henriot)和国内新近发现的拟长毛钝绥螨(Amblyseius Pseudolongispinosus Xia Laing et Ke)、捕食山楂叶螨(Tetranychus viennensis Zacher)和二点叶螨(T.urticae Koch)的生育情况及其对相对温度的反应。西方盲走螨捕食山楂叶螨与捕食二点叶螨相比,世代发育历期延长,产卵量减少,性比也有所下降。拟长毛钝绥螨捕食两种叶螨,在发育历期和雌成螨产卿量方面差别不显著,但捕食山楂叶螨的性比降低。智利小植绥螨捕食山楂叶螨,对其生育影响最明显,表现雌成螨寿命显著缩短,产卵量和性比下降。在相对湿度29.5～92.5%范围内饲养三种植绥螨,在卵的孵化,幼螨、若螨的成活和成螨产卵方面均有明显的差异。试验表明,西方盲走螨是耐干的种类,拟长毛钝绥螨和智利小植绥螨是喜温的种类,特别是拟长毛钝绥螨对湿度更为敏感。

EFFECTS OF PREY SPECIES AND RELATIVE HUMIDITY ON THE DEVELOPMENT, SURVIVAL AND FECUNDITY OF THREE SPECIES OF REDACIOUS MITES

The effects of prey species and relative humidity on three species of predacious mites were studied in the laboratory.Metaseiulus occidentalis fed on Tetranychus viennensis had a longer developmental period and lower fecundity than those fed on T.urticae,however the effect was not signi-ficant on Amblyseius pseudolongispinosus,although the sex ratio of the F₁ progeny was lower when A.pseudolongispinosus were reared on T.viennen-sis.Phytoseiulus persimilis fed on T.viennensis had shorter adult life,lower fecundity and the F₁ progeny had lower sex ratio.