二氯苯醚菊酯,又名除虫精,1973年首先由英国合成。江苏农药研究所于1975年试制成功。它是一种低毒、无残留、对光稳定的广谱高效杀虫剂。本所1978～1979年应用10％二氯苯醚菊酯乳油防治二代粘虫,亩施药1.25克有效成分,小区试验表明:24小时后杀虫效果达96％。1981年又在前二年试验的基础上,把60％的原油加工成粉剂,并在1,094亩谷地上做了防治粘虫的试验示范,结果如下: Permethrin, also known as demetonidin, was first synthesized by the British in 1973. Jiangsu Institute of Pesticide trial success in 1975. It is a low toxicity, no residue, light stable broad-spectrum efficient insecticides. The Institute from 1978 to 1979 using 10% permethrin EC control of the second generation armyworm, acres of pesticide application of 1.25 grams of active ingredient, cell test showed that: 24 hours after the insecticidal effect of 96%. In 1981, on the basis of the first two years of experiments, 60% of the crude oil was processed into a powder and tested against armyworm in 1,094 mu of valley. The results are as follows: