Avoid use of well water or sewage dispensing: well water contains more calcium, magnesium and other minerals, and they are easy to react with chemicals to produce precipitates, thereby reducing the efficacy. Sewage contains a lot of impurities, spray will block the sprayer nozzle, while also destroying the stability of the liquid, but also reduce the efficacy.
Second, avoid bogey and high temperature under the spraying: spraying pesticides will make the pesticide drift; rain, pesticides, rain washed by the liquid is easy to reduce efficacy; application of pesticides at high temperatures, prone to phytotoxicity and poisoning. Therefore, the best application time is from 8 to 11 am, and from 4 to 6 pm when the weather is fine.
Three bogey spraying: crops applied during the flowering period, prone to phytotoxicity.
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