First, pay attention to drug selection
Wheat with broadleaf weeds as the dominant species, 10% bensulfuron-methyl WP or 75% sulfonate dry suspension or 72% 2,4-D butyl emulsifiable concentrate; For the dominant species of wheat, spray with 3.6% methyl disulfuron (Sima) suspension; broadleaf weeds mixed with grasses such as wheat, weeds, and 3.6% methyl disulfuron can be used. + Methyl iodsulfuron sodium salt (Koshima) water dispersible granule spray.
Second, pay attention to pesticide compounding
Scientific compounding pesticides has a multiplier effect, but improper mixing is often prone to phytotoxicity. To this end, the relevant technical personnel must be consulted before mixing, and it is not allowed to be mismatched.
Third, pay attention to the concentration of liquid
The concentration of the liquid should be prepared in strict accordance with the instructions for the use of herbicides. Do not arbitrarily reduce or increase the concentration of the liquid.
Fourth, pay attention to the amount of liquid
Taking a conventional sprayer as an example, the amount of liquid used in the mu should generally be controlled at 30-40 kg, at least not less than 30 kg (ie 2 sprayers).
Five, pay attention to the dispensing method
Regardless of which type of herbicide, it should be scientifically prepared according to the amount per acre and the amount of water per acre. First, it is formulated into a mother liquor, and then diluted twice. It is not allowed to add water directly into the cartridge.
Six, pay attention to the spraying period
Spring is the period of chemical herbicide weeding. Generally, wheat is the best time for chemical weeding, and the early control is not good. It is easy to produce phytotoxicity when it is too late.
Seven, pay attention to the timing of spraying
Choose sunny, no wind, the daytime temperature is stable above 10 °C and no frost and heavy rain in 4 days, the spraying time is preferably 10:17-17 hours.
Eight, pay attention to the choice of medicine
In the spring wheat chemical weeding, we should pay attention to three points when using the medicine: First, do not use the sprayed herbicides; second, do not use the drugs that are serious in dripping; third, do not use the medicines that are not well atomized.
Nine, pay attention to the weather conditions
Can not be used in windy weather, in order to avoid the drift of the liquid, causing phytotoxicity to nearby sensitive crops; if the temperature is too high or the cold wave comes, do not use the medicine to avoid the phytotoxicity of the wheat seedling itself.
Ten, pay attention to the watering time after the medicine
Do not flood the wheat field with water in 5 days after application to avoid phytotoxicity. (Yicheng County Agricultural Technology Center Zhao Baoqin)
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