斯氏新小绥螨以神泽氏叶螨为猎物的发育与实验种群生命表研究

本研究进行了斯氏新小绥螨Neoseiulus swirskii （Athias-Henriot）以神泽氏叶螨Tetranychus kanzawai（Kishida）为猎物时,在15℃、18℃、20℃、25℃、30℃和35℃下的发育历期和实验种群生命表的研究,结果表明15℃时斯氏新小绥螨不能完成发育,18℃时仅少量个体能完成发育.在18～35℃之间,雌螨的发育历期为7.15～18.70 d,雄螨的发育历期为4.00～16.20 d.在20℃～35℃之间,斯氏新小绥螨的雌雄性比（♀∶♂）随着温度的升高而变小,20℃时性比最大（1.77）,25℃时净增殖率（R0）最大（36.497）,35℃时世代生长周期最短（15.433）,30℃时内禀增长率（rm）和周限增长率（λ）均最大,分别为0.197和1.218,种群倍增时间（t）最短（3.513）;随着温度的增加,斯氏新小绥螨的平均寿命逐渐变短,20℃时最长（73.40±1.26 d）,35℃时最短（25.10±1.20d）;25℃时每雌平均产卵量最高（60.44±1.51粒/雌）,35℃时日平均产卵量最高（2.06±0.09粒/雌/d）.

Laboratory Population Life Table and Developmental Duration of Neoseiulus swirskii (Athias-Henriot)Feeding on Tetranychus kanzawai (Kishida)

Laboratory population life table parameters and developmental duration of Neoseiulus swirskii （Athias-Henriot） were studied at six constant temperatures, 15 ℃, 18 ℃, 20 ℃, 25 ℃, 30 ℃ and 35 ℃, respectively, feeding on Tetranychus kanzawai （Kishida）. The results indicated that all of individuals of the predatory mite could not remain alive at 15 ℃, and a few predators could do at 18 ℃. The developmental duration of female was 18.70 days at 18 ℃ or 7.15 days at 35 ℃, correspondingly, that of male was 16.20 days or 4.00 days respectively. The highest sex ratio （1.77）, the highest net reproductive rate （Ro = 36.4972 ） and the lowest mean generation time （T=-15.4329） were obtained at 20 ℃, 25℃ and 35 ℃, respectively. The highest intrinsic rate of natural increase （rm = 0.1973） was observed at 30℃, and the population could double in 3.513 2 days. The highest longevity （73.40 ± 1.26 days） and the highest mean number of eggs （60.44 ± 1.51 eggs/female） were observed at 20 ℃ and 25℃, respectively.