杀虫剂的

There are over 500 species of insect with ecotypes known to be resistant to insecticides.6

有超过500种的昆虫物种出现了针对杀虫剂的抗性。

They said this is because of a decrease in pesticide use made possible by Bt cotton.

他们说这是由Bt棉花使杀虫剂的使用减少所导致的。

Worse yet, the Diamondback is becoming resistant to pesticides.

更糟的是，小菜蛾对于杀虫剂的抗药性越来越大。

Due to emergence of the drug resistance of the parasite and the insecticide resistance of Anopheles mosquito, it becomes more difficult to control malaria.

由于疟原虫抗药性以及蚊媒抗杀虫剂的抗性产生，使疟疾防治面临严重困难。

The goal is to reduce use of the pesticide known as DDT.

目标是减少像DDT杀虫剂的使用，美国早在1972年基本上已禁用。

It is common practice to screen for this toxicity in the evaluation of the safety of new insecticides.

一般在评价新杀虫剂的安全性时，常检查这一毒性。

The results showed that leaf protection rates represented protection effect of insecticides more accurately than mortalities.

结果表明：叶片保护率比死亡率能更准确地反映部分杀虫剂的保护作用。

Times of signal-to-noise ratio being taken as detection limit, the limits of 3 kinds of pesticides detected by this method were: Aldrin of 0.3 μg/kg, Dieldin of 0.5 μg/kg and Endrin of 0.3 μg/kg respectively.

以3倍信噪比为检出限，采用该方法对3种杀虫剂的检测限分别为：艾氏剂为0.3μg/kg；狄氏剂为0.5μg/kg；异狄氏剂为0.3μg/kg。

Methods The insecticide film was used to identify the resistance of German cockroach to four kinds of insecticides.

采用药膜法测定德国小蠊对4种常用杀虫剂的抗性水平，采用分光光度法测定酶活性。

Collected strains of the German cockroach （Dictyoptera: Blattellidae）［J］.

北京市区德国小蠊对4种杀虫剂的抗性测定［J］。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。