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山楂叶螨是为害北方果树叶子的主要害螨,减产20～60％。目前广泛应用20％三氯杀螨醇,为了扩充药源,明确克螨特防治果树山楂叶螨的效果,交替使用农药,以延缓抗药性产生,1984～1985年做了克螨特防治试验,现总结如下。一、室内试验 1.杀卵试验:在水培的苹果枝条的叶上接成螨,待其产卵后去掉,留下卵期为一天的卵,用定时(3秒钟)浸药液法浸带卵的枝叶,药后6天查其卵孵化率,在平均气温为28.53℃,平均相对湿度为73.81％条件下,73％克螨特1000～3000倍处理的卵孵化率为零,校正死亡率为100％,比常用农药20％三氯杀螨醇
Hawthorn spider mite is the main pest damage to the northern fruit tree leaves, cut 20 to 60%. At present, 20% dicofol is widely used. In order to expand the source of medicine, the effect of propargite on the control of fruit tree hawthorn spider mite is clearly demonstrated. Pesticide is used alternately to delay the emergence of drug resistance. Experiments on propargite were conducted from 1984 to 1985 and are summarized as follows. First, the indoor test 1. Ovicidal test: in the hydroponic branches of the apple leaves mites, to be removed after spawning, leaving the egg for one day eggs, with time (3 seconds) dip liquid method The egg hatching rate was checked 6 days after the drug was dipped. With the average temperature of 28.53 ℃ and the average relative humidity of 73.81%, the egg hatching rate of 73% The mortality rate is 100%, 20% dicofol than the commonly used pesticides