1. It is prohibited to use highly toxic and high-residue pesticides such as 1605, 1059, methamidophos, organic amalgam, arsenic, chlordane, cyanide, dibromochloropropane, and chloroacetic acid amine. At the same time, we must strictly implement the "safety interval" standard for pesticide use. Do not spray pesticides 10 to 15 days before harvesting vegetables to ensure that vegetables meet pollution-free standards. 2, the right medicine and timely medication: a lot of pests and diseases of vegetables, and sometimes several pests and diseases occur at the same time, there must be targeted use of pesticides and methods of application. 3. Correctly grasp the use concentration of various types of pesticides: At present, there are many kinds of pesticides and dosage forms. For pesticides with the same name but different dosage forms, the concentration, application method, and time are often different, so it is necessary to strictly follow the types of pesticides. Recommended doses and methods to use. 4. Implementation of Alternation Alternation and Mixed Use In the production practice, alternations and rotations of pesticides with different mechanisms of action should be adopted to control pests, which can effectively overcome the effects of resistance, rapid killing and cost reduction. In the same way, adopting scientific and rational compounding of mixed pesticides can be used to expand prevention and control targets and improve control effectiveness. It can also effectively exert its advantages to delay pest resistance and reduce control costs. However, it must not be blindly and randomly mixed, should choose the same nature (such as both acidic or alkaline) of the two or three pesticides mixed, so that according to their respective concentration requirements for mixing, with the mix with the spray.