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我国菜青虫抗药性的形成大体上可分为两个阶段,六十年代末为滴滴涕抗药性高峰期,停用滴滴涕后,其抗性有所衰退。七十年代中期进入敌百虫抗性高峰期。目前的菜青虫多为敌百虫-滴滴涕联合抗性种群。敌杀死对敌百虫表现出正交互抗性,滴滴涕与敌百虫之间未表现明显的交互抗性,而辛硫磷对敌百虫却表现负交互抗性现象。用33种杀虫剂对联合抗性菜青虫种群做了田间药效试验及毒力测定,按药效将其分为六级:属特效、高效和有效级的药剂共有22种;属低效,基本无效和无效级的药剂共有11种。沙蚕毒素类药剂杀虫环对菜青虫药效高,对菜青虫体内的某些种类的寄生蜂影响较小,有利于协调防治。
The resistance formation of Pieris rapae in our country can be divided into two stages in general. In the late 1960s, the resistance of DDT was peaked. After DDT was disabled, the resistance declined. Seventy time into the trichlorfon resistance peak. The current cabbage caterpillar is mostly trichlorfon - DDT joint resistant populations. Enemy kill showed antagonistic activity to trichlorfon, DDT and trichlorfon did not show obvious cross-resistance, while phoxim showed negative cross-resistance to trichlorfon. With 33 kinds of insecticides on the combined resistance Pieris rapae field population efficacy test and virulence determination, according to the efficacy of its six grades: a special effect, high efficiency and effective level of a total of 22 kinds of pharmaceutical agents; inefficient , Basically ineffective and ineffective level of a total of 11 kinds of drugs. The nereistoxin insecticidal ring has high efficacy on Pieris rapae and has less effect on some parasitic wasps in Pieris rapae, which is good for coordination and prevention.