Xia Shi pesticide "six don't"

First, do not use sewage treatment: There are many impurities in the sewage. It is easy to plug the nozzle with its dispensing, and it can also destroy the suspension of the pharmaceutical and cause precipitation. Second, do not use well water dispensing: well water contains more minerals. The combination of these minerals and pesticides is prone to chemical reactions, precipitation, and reduced efficacy. Third, do not use pesticides on stormy days and hot days: windy spray will make pesticide powder and liquid dispersion; rain, pesticides, liquid medicine will be washed to reduce efficacy; under the hot sun, plant metabolism, leaf Stomatal expansion, prone to phytotoxicity. The best spraying time: 8 to 10 am, 3 to 6 pm. Fourth, do not abuse pesticides: According to the type of crop, the object of control and the performance of pesticides using the corresponding pesticides, truly corresponding to the drug, the abuse of pesticides often cause phytotoxicity. Fifth, do not use a drug: long-term use of a drug, easy to make pest resistance, reduce control effect. 6. Do not spray before harvesting: The residual period of general high-toxic pesticides is about 60 days; the residual period of high-efficiency low-toxic pesticides is about 15 days. Spraying before harvest can easily cause food poisoning.