First, do not use sewage treatment. There is a lot of impurities in the sewage. It is easy to clog the nozzle and it is also easy to destroy the suspension of the chemicals and cause sedimentation. Second, do not use well water dispensing. Well water is rich in minerals and generally contains calcium and magnesium. These minerals are easily mixed with pesticides to form chemical compounds, which can lead to drug precipitation and reduce efficacy. It is best to dilute pesticides with clear river water. Third, do not use pesticides on stormy days and hot days. Wind spray will make pesticide powder and liquid medicine drift; rain, pesticide, liquid medicine will be washed by rain to reduce efficacy, resulting in economic waste; under the hot sun, plant metabolism, leaf stomatal opening, spraying The most prone to phytotoxicity. The best application time is: 8-11 am and 3-6 pm. Fourth, do not abuse pesticides. First of all, it is necessary to apply the corresponding pesticides according to the type of crop, the object of control, and the performance of the medicament, and it is truly possible to prescribe the right medicine, and indiscriminate use of pesticides will often cause the consequences of spending money to buy medicine. Fifth, do not spray during the flowering period. Crops and fruit trees flowering and young fruit, young and tender, poor disease resistance, prone to phytotoxicity. Therefore, it is necessary to avoid spraying and flowering. Six, do not use a drug. The use of only one agent for a long period of time makes it easier for pests to develop drug resistance and reduce the effectiveness of control. 7. Do not spray before harvesting. The period of high-efficiency highly toxic pesticides is approximately 60 days, and the period of high-efficiency and low-toxicity pesticides is approximately 15 days. Therefore, grain and vegetable products are prohibited from applying pesticides before harvest to prevent food poisoning.
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