利用化学药剂防治棉蚜是目前行之有效的方法。但由于长期单一使用乐果,1059药剂,产生了抗药性,防治效果大大降低。几年来,我们对北京市农药二厂提供的新的药剂氧化乐果和氧敌乳油进行了试验,效果很好。试验方法是,防治前在同一块地上定株挂牌,调查蚜虫基数,喷药后,分别于24小 The use of chemical agents to control cotton aphid is currently an effective method. However, due to long-term single use of dimethoate, 1059 agents, resulting in resistance, prevention and control greatly reduced. In recent years, we have carried out experiments with the new agents omethoate and oxymatrine EC provided by Pesticide Factory No. 2 in Beijing. The test method is, before the prevention and control in the same piece of land Dingbian listing, aphid base survey, after spraying, respectively, in the 24 small