中文摘要：

采用饲料含毒法，测定了棕尾别麻蝇Boettcherisca peregrine 1日龄幼虫连续取食含不同浓度Cd^2＋或Cu^2＋的人工饲料，体内丙二醛含量的变化过程。实验结果表明：二种重金属离子能诱导昆虫的脂质过氧化反应，并且存在浓度依赖效应和时间依赖效应。在0—1600μg/g饲料浓度范围内，丙二醛（malondialdehyde，MDA）含量与幼虫取食Cd^2＋和Cu^2＋的浓度呈线性关系，所求回归方程分别为y=0．2789＋0．0002x和y=0．3141＋0．0002x。当处理浓度为800μg/g时，在0-120h时间内，MDA含量与幼虫取食Cd^2＋和Cu^2＋的时间呈线性关系，回归方程分别为y=0．3041＋0．0042x和y=0．3251＋0．0029x。

英文摘要：

The dynamical variations of malondialdehyde in Boettcherisca peregrine larvae were studied af- ter one-day-old instar larvae were fed on the artificial diet containing various concentration of Cd^2＋ or Cu^2 ＋. The results showed that increasing of LPO was induced in B. peregrine larvae by Cd^2 ＋ or Cu^2 ＋ indose-dependent and time-dependent effects. When the exposure concentrations were in the range of 0 - 1600 μg/g diet, the linear relationship was found between the malondialdehyde （MDA, LPO product and a marker of oxidative stress） concentrations and Cd^2＋ or Cu^2＋ concentrations in the artificial diets. The regression equations for Cd^2＋ and Cu^2＋ were as follows： y =0. 2789 ＋0. 0002 x and y =0. 3141 ＋ 0. 0002 x. There was a linear relationship between the MDA concentration and feeding time, during the 120 h at the level of dietary Cd^2＋ or Cu^2＋ （800 μg/g） . The regression equations were y =0. 3041 ＋ 0. 0042x and y = 0. 3251 ＋ 0. 0029 x, respectively.