1, to choose the herbicide
For wheat fields dominated by monocotyledonous weeds, herbicides such as thrips, golden horses, and Shima can be used. For the wheat field dominated by dicotyledonous broadleaf weeds, herbicides such as sulforaphane, thifensulfuron and 2,4-D butyrate may be used. Single or dicotyledonous mixed wheat fields can be mixed with giant stars or bensulfuron-methyl.
2, to strictly control the dosage and the preparation method of the liquid
It is necessary to strictly control the dosage, and it is not possible to reduce or increase the dosage at will, so as not to reduce the control effect or cause phytotoxicity. For the pharmaceutical liquid, the second dilution method should be used to prepare the original drug into the mother liquor. The sprayer should be properly added with water, then the appropriate amount of mother liquor should be poured, and finally, the water should be added and mixed evenly. The water consumption per mu is not less than 30 kg.
3, to master the best period of medication
In the spring wheat field, chemical weeding starts from the greening period to the beginning of the early jointing stage. The spraying is too early, and the low temperature effect is not good. If the temperature is high after spraying, the wheat seedlings will cause phytotoxicity and will cause phytotoxicity to the lower crop.
4, to master the temperature and humidity of medication
The starting time for the medication is required to be above 10 °C on average, and on sunny days from 10 am to 3 pm. If the soil is dry, first pour the green water before spraying the herbicide.
5, to master the correct use
Spray the drug evenly and thoughtfully, try to make the agent moisten the stems and leaves of the weeds, and do not spray or spray. It is strictly forbidden to spray on windy days when spraying, especially 2,4-D butyl fat, to prevent the liquid from drifting, causing phytotoxicity to other crops. After the sprayer is used, it should be strictly cleaned, especially 2,4-D butadiene. Soak it in 3% ferrous sulfate for 24 hours, and unplug the switch, nozzle and spray belt, and rinse it well to avoid other use. Crops produce phytotoxicity.
More pesticide knowledge , please pay attention to China Pesticide Network
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