一、材料和方法1、供试药剂 25%硫·氰乳油(江苏丰山集团有限公司)、40%久效磷(安徽蚌埠农药厂)。2、试验设计试验设5个处理,即:处理1,40%久效磷100毫升/667米~2;处理2,25%硫·氰乳油100毫升/667米~2;处理3,25%硫·氰乳油110毫升/667米~2;处理4,25%硫·氰乳油125毫升/667米~2;处理5,对照(清水)。小区面积为30米~2,重复3次,随机区组排列,每小区之间留1.5米的保护行,于7月3日用工农-16型背负式手动喷雾器按50升/667米~2药液量进行喷雾,喷洒均匀周到,无重喷漏喷。3、试验地基本情况试验设在巴楚县恰瓦克乡4村2组,壤土,肥力中上,前茬作物棉花,供试棉花品种为中棉所35号。棉花株高整齐,长势良好,正值花铃期,为二代棉铃虫幼龄盛期,危害较重。是历年棉铃虫重发生地。4、调查方法每小区单对角线5点取样,每点 First, the material and methods 1, the test agent 25% Sulfur · Cyanide EC (Jiangsu Fengshan Group Co., Ltd.), 40% monocrotophos (Anhui Bengbu Pesticide Factory). 2, the experimental design of the experiment set up five treatments, namely: 1,40% monocrotophos 100 ml / 667 m ~ 2; 2,25% sulfur and cyanide EC 100 ml / 667 m ~ 2; Sulfur · Cyanide EC 110ml / 667m ~ 2; Treating 4,25% Sulfur · Cyan EC 125ml / 667m ~ 2; Treatment 5, Control (clear water). Residential area of ​​30 m ~ 2, repeated 3 times, random block arrangement, leaving 1.5 meters between each cell protection line, on July 3 with a worker-peasant -16 type portable sprayer by 50 liters / 667 m ~ 2 Amount of liquid spray, spray evenly and thoughtful, no heavy jet spray. 3, The basic situation of the experiment The experiment was set up in Group 2 of 4 villages of Chawak Township, Bachu County. The loam soil, the upper and middle fertility, the cotton of the former crop, the cotton variety for testing was CUM-S35. Cotton plants neat and tidy, good growth, positive when the flowering period, the second generation of cotton bollworm young age, more serious harm. It is the place where cotton bollworm occurs in the past years. 4, the survey method for each cell single diagonal 5 sampling, each point