1, symptomatic application of drugs, timely medication. First of all, we must accurately identify the types of pests and diseases, determine the key targets for prevention and control, and select the appropriate pesticide species and dosage forms according to the occurrence period and occurrence level. To prevent and treat diseases, spray the protective agent before the occurrence of the disease. After the occurrence of the disease, spray the therapeutic agent. Prevention and treatment of diseases should be based on the principle of first-protection and post-treatment, seize the best timing of application, and use drugs several times to achieve good results.
2, rational use of drugs. In the case of ensuring the control effect, do not blindly increase the amount of drug, concentration and frequency of application, overdose is prone to phytotoxicity. In the range of effective concentration, the use of low-concentration drugs should be used as far as possible to prevent and control. The number of prevention and cure should be determined according to the residual effect period of pesticides and the occurrence of pests and diseases.
3, pay attention to spraying methods. Different formulations of pesticides should use different methods of application. General emulsions and wettable powders are mainly sprayed and splashed; dusts are mainly dusted; granules are mainly spread or deep-based; powders with strong suction are sprayed, sprayed, poured, coated Stems can be. Pesticides with different mechanisms of action should also adopt different methods of application in order to achieve the highest control efficiency. According to the location of the disease, the pest activity patterns and different pesticide formulations, choose different methods of application and application time.
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