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How to prevent vegetable pests from developing drug resistance
Pest resistance refers to “the ability of a certain pest to have a dose that is resistant to killing most of the same species of normal pestsâ€. In recent years, due to the large amount of insecticides used to control vegetable pests, the resistance of insect pests has been increasing. Some types of vegetable pests, even if the dosage or concentration of drugs is increased by several to several tens of times, the desired control effect cannot be obtained. This brings great difficulties to the normal production of vegetables. Methods to prevent drug resistance: 1. Change the use of new agents and alternate rotations of agents with different modes of action: After pests become resistant to certain insecticides, use alternative modes of action (insecticide mechanisms) for different agents. Will basically eliminate the original resistance to the kind of agent. Experiments have shown that the alternate use of agents with different modes of action alternately can significantly delay the development of pest resistance and improve control effectiveness. 2, rational mix of pharmaceutical agents: such as Spodoptera litura and other lepidopteran pest resistance to a certain agent, such as mixed with microbial agents can receive good control effect. 3. Comprehensive prevention and control: The use of comprehensive prevention and control measures such as agricultural control and biological control can not only reduce the use of chemical pesticides, but also prevent pests from developing resistance.