In the prevention and control of crop diseases and pests, some households do not pay attention to the dilution of pesticides, resulting in pesticides failing to exert their due prevention and control functions, resulting in failure to control or even causing phytotoxicity, and causing losses to agricultural production.
There is a difference between soft and hard water for diluting pesticides, namely soft water and hard water. Hard water refers to water containing calcium, magnesium, and other ions, such as well water, salt water, and sea water. The hardness (100 parts of water in 100,000 parts of water contains 1 part of calcium oxide) is generally 18-20 degrees. The so-called soft water refers to fresh water such as river water, river water, and lake water, containing less calcium and magnesium ions, and its hardness is about 7.5 degrees.
Diluting the pesticide with hard water, the calcium and magnesium ions in the water can reduce the suspension rate of the wettable agent, or synthesize calcium and magnesium precipitates with the emulsion in the emulsion, and destroy the emulsifying performance of the emulsifiable concentrate, which not only reduces the control efficiency of the pesticide, but also easily Crops produce phytotoxicity and can easily clog the sprinkler. Therefore, when diluting pesticides, we must use soft water for water use. It is best to use fresh water such as river water, river water, lake water, and natural rainwater and snow filled with utensils to ensure the control effect.
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