目前,防治棉红蜘蛛的常用农药石硫合剂加退得完效果往往不够理想,新农药杀虫脒防治效果虽然很好,但又供不应求。为了寻找防治效果好的药剂,1975年我们进行了药效对比试验,发现25％二二三乳剂200倍加1％尿素对红蜘蜘的防治效果很好:对卵的防效达100％,比0.2度石硫合剂加800倍退得完防效提高63.3％;防治若虫和成虫的效果达98.1—99.5％,比0.2度石硫合剂防效提高11.5％。另外,对棉蚜和棉铃虫也有良好防治效果。对棉蚜防治效果可达98％以 At present, the commonly used pesticide stone sulfur and sulfur compound for controlling cotton spider mites is often not ideal enough, and the control effect of the new pesticide chlordimeform is good, but it is in short supply. In order to find a good effect of prevention and treatment of agents, in 1975 we conducted a comparative test of efficacy and found that two hundred twenty-three emulsion 200% plus 1% urea on the red spider control effect is very good: the egg control effect of 100% 0.2 degree stone sulfur mixture plus 800 times the end of anti-efficiency increased 63.3%; prevention and control of nymphs and adults effect of 98.1-99.5%, 0.2% than limestone sulfur mixture control effect increased by 11.5%. In addition, cotton aphid and cotton bollworm also have good control effect. Cotton aphid control effect up to 98%