棉红蜘蛛是棉花上一种重要害虫,由于杀螨剂品种太少,多年来长期使用三氯杀螨砜,三氯杀螨醇及其他几种常用农药,害虫大多产生了抗药性。我们于1982年用甲胺磷和敌百虫混剂防治棉红蜘蛛获得了较好的防治效果,现将试验结果总结如下: 试验材料供试药剂:50%甲胺磷复合一号(甲胺磷+敌百虫)和50%甲胺磷复合二号(甲胺磷+敌百虫+增效剂)两种乳油均为安徽省化工研究所提供。50%甲胺磷乳油市售(宁国农药厂产)。试验在历年棉红蜘蛛发生为害较重的宿县棉种场大田中进行,棉花品种为鲁棉一号,生长期处 Cotton spider mite is an important pest on cotton. Due to too few varieties of acaricides, long-term use of dicofol, dicofen and several other commonly used pesticides has resulted in resistance to insects. We in 1982 with methamidophos and trichlorfon mixed cotton spider mites prevention and control have a better control effect, the test results are summarized as follows: Test materials for the test agent: 50% methamidophos complex (methylamine Phosphorus + trichlorfon) and 50% methamidophos complex No. 2 (methamidophos + trichlorfon + synergist) two kinds of EC are provided by the Institute of Chemical Industry. 50% methamidophos marketed (Ningguo Pesticide Factory production). Experiments in the calendar year before the occurrence of cotton spider mites heavier Suxian cotton fields in the field, cotton varieties for the lumaian one, the growth period