温度对以朱砂叶螨为食的加州新小绥螨实验种群参数的影响

Effects of temperature on the parameters of experimental populations of Neoseiulus californicus(Acari:Phytoseiidae)feeding on Tetranychus cinnabarinus

在19、22、25、28和31 ℃ 5种温度条件下, 研究了加州新小绥螨［Neoseiulus californicus （McGregor）］国内种群以朱砂叶螨［Tetranychus cinnabarinus （Boisduval）］为猎物的实验种群参数。在19~31 ℃温度范围内, 随着温度的升高, 加州新小绥螨世代发育历期和种群倍增时间缩短, 在31 ℃下, 世代历期和种群倍增时间最短, 分别为5.69 d和2.537 2 d。净增殖率在25 ℃时最大, 为26.707 7。内禀增长率（rm）和周限增长率（λ）随着温度的升高而增大, 在31 ℃时为最大, 分别为0.273 2和1.314 2。在28 ℃时性比（♀/（♀＋♂））最大, 为0.642 4。在28 ℃时, 平均每雌产卵数最大, 为46.6粒/雌。加州新小绥螨国内种群捕食朱砂叶螨的发育和繁殖生物学特性表明该捕食螨具有重要的生物防治潜能。

The parameters of the experimental populations of domestic Neoseiulus californicus （McGregor） feed- ing on Tetranychus cinnabarinus （Boisduval） were investigated in the laboratory at five constant temperatures, namely 19, 22, 25, 28 and 31 ℃. The generation time and population doubling time decreased with increasing temperature from 19 ℃ to 31 ℃. Generation time and population doubling time were shortest at 31 ℃, which were 5.69 days and 2. 537 2 days, respectively. Net reproductive rate was highest （26. 707 7） at 25 ℃. The intrin- sic rate of natural increase （rm） and finite rate of increase （λ） increased with increasing temperature, and both rm （0. 273 2） and 2 （1. 314 2） were highest at 31 ℃. The sex ratio （♀/（♀＋♂） was highest （0. 642 4） at 28 ℃. The mean number of eggs （46.6 eggs per female） was highest at 28 ℃. The data obtained from N. californicus feeding on T. cinnabarinus showed that N. californicus had an important potential for biological control of T. cinnabarinus.