Second, the herbicides uncovered in enclosed weeds include the mixture of ethazione, yucacao, and thiamine. In general, 200 grams per mu is used, and 45 kg of water is used. If the amount of water is small, the drug sealing layer is thin, and some highly resistant weeds can easily drill out the sealing layer, resulting in poor control efficiency. However, the amount of water can not be too large, otherwise the effective concentration of the agent will decrease, and no blocking effect will be achieved.
3. When the above-mentioned closed herbicides come into contact with cotton, peanuts, soybeans, and vegetables, they will have different degrees of phytotoxicity. Therefore, when spraying the above herbicides, the following principles must be followed: Spray as much as possible without wind, and prevent the medicaments from falling into the wind. Floating to vegetables, peanuts and other crops; spraying after lowering the sprayer to minimize the drift of the sprayer; wearing a protective cover and directional spray before the spray head.
4. In recent years, due to the poor effect of using enclosed herbicides on individual plots, some farmers’ friends, such as corn and weeds, have grown out and weeding with herbicides such as Yule, Yuheng. However, farmers' friends should be reminded that the best time for prevention and control is when 4 to 5 leaves of corn and 3 to 4 leaves of weeds are used. If the corn is used for control after 7 leaves, it may cause injury.
5. Insect pests may occur in corn fields. Mixtures of insecticides and herbicides can be used. However, with herbicides Yu Nongle and Yu Hengshi, pesticides cannot be mixed with organophosphorus pesticides to avoid phytotoxicity.
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