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一、材料与方法试验设四个处理，即50％的甲拌乳剂用清水分别配制成1％、1．13％、1．33％浓度的药液，用清水作对照。试验地点设在106团7连17号条田，该条田已重茬4年，且去年棉叶螨大发生为害重。每个处理面积为4．5公顷（67．5亩），每公顷喷药液225公斤。50％甲拌乳剂三个
First, the material and method The experiment set up four treatments, namely 50% of the A emulsion with water were formulated into 1%, 1.13%, 1.33% concentration of liquid, with water as a control. The test site is located in the 106th Regiment 7th and 17th Field, which has been re-cropped for 4 years, and last year the spider mite occurred as a serious weight. Each treatment area of 4.5 hectares (67.5 acres), spraying liquid per hectare 225 kg. 50% A three emulsion