How to improve the herbicide effect
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1. When purchasing corn herbicides, the herbicide weeding object and instructions for use are first removed. For plots of foxtail, goosegrass, alfalfa, alfalfa, and crabgrass, 41% Yucaojing SU (suspension) 180-200 ml/mu, or 40% atrazine SC160 ml/mu, may be used. Or use 40% acetaminophen SC (suspension) 160 ~ 200 ml / mu, used before emergence of corn after sowing, can not be later than the weed 2 leaf stage; weeds should choose 4% in the 2 to 5 leaf stage Yu Nong Le SC70 ml / mu, or 2.25% Kang Shi EC (milk oil) 120 ml / mu, weed control; there are large weed plots, corn immediately sprayed 20% paraquat AS ( Water agent) 80 ~ 12. ML/mu, after spraying cornfield herbicide.
2. Mechanical harvesting of corn plots of wheat should first clear the wheat straw and wheat bran in the field, and increase the dosage appropriately. The maximum dose can be indicated in the corn field with high wheat.
3. When the herbicide is used, it should be sprayed according to the principle of first spraying the ground and moistening the surface of the soil. In the dry year, spray the pesticide immediately after watering. After spraying, it will rain and the efficacy will be lost. Spray should be sprayed again. When spraying, it is better to moisten the surface of the ground, which is conducive to the formation of the film, and achieves the effect of closing the ground and exerting the effect of weeding.
4, strictly control the amount of medication, increase the amount of liquid. At present, there are many types of corn herbicides, and the content of active ingredients is quite different. It is strictly used according to the dosage instructions of the medicine. It is strictly forbidden to use too large or too small a dose, and it is necessary to ensure the herbicidal effect without affecting the growth of corn and squat crops. Generally, it is required to use 35 to 45 kilograms of medicinal liquid per mu, or a large amount of 45 to 55 kilograms per acre to ensure the moist surface effect of the soil after spraying.
5. Timely and correct application of herbicides (1) Determine the spraying period according to the instructions for use of the herbicide. (2) Shake the mother liquor thoroughly before using it. (3) Spraying by spraying in the spray. (4) Master the windless weather before 9 am or after 5 pm. Do not spray, do not leak, spray a proper amount.
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