多异瓢虫的发育与温度的关系

测定多异瓢虫Hippodamia variegata(Goeze)在13,17,21,25,29和33℃下各虫态的发育历期。结果表明,在不同温度梯度下,多异瓢虫全世代历期依次为:(62.23±3.42)d,(48.31±2.96)d,(25.01±2.53)d,(20.78±1.83)d,(13.68±0.67)d和(10.92±0.58)d。利用最小二乘法确定出多异瓢虫各虫态的发育起点温度和有效积温,其全世代的分别为10.85℃和249.79日.度;由微分法求出Logistic曲线方程中的最大发育速率K,进而由最小二乘法求出a、r,从而确定出多异瓢虫各虫态的发育速率与温度的Logistic曲线关系,其全世代的为:V=0.101156/1+exp(3.905041-0.183509T)];由Lagrangc中值定理求出各虫态的发育最适温度、适宜温区,其全世代的分别为:Tmid(最适温度)=21.28℃、Tmin(适宜温区下限)=11.55℃、Tmax(适宜温区上限)=31.01℃。

Relationship between the temperature and the development of Hippodamia variegata

The duration of Hippodamia variegata （Goeze） was measured at the temperature of 13,17,21,25,29, and 33℃. The results showed that the whole generation duration of H. variegata was （62.23 ± 3.42）d, （48.31 ± 2.96） d, （25.01 ± 2.53）d, （20.78 ± 1.83）d, （13.68 ± 0.67）d and （10.92 ± 0.58）d, respectively, at the temperature mentioned above. The developmental threshold temperature and effective accumulated temperature of H. variegata were also calculated as 10.85℃ and 249.79 day-degree, respectively, by the Least Squares Method. The Logistic curve equation of the whole generation was V = 0. 101156/ 1 ＋ exp （ 3.905041 - 0. 183509 T ） ]. The optimal temperature, the lowest temperature for development, and the highest temperature for development was estimated as 21.28℃, 11.55℃ and 31.01℃, respectively, by the method of Lagrangc Theorem.