Closed weeding method of soil in Maize Field

What are the main weeds in the cornfield? What are the closed weeding methods of soil in corn field? We also ask experienced netizens to help introduce the main weeds in the cornfield, such as Monocotyledon and dicotyledonous weeds, such as Monocotyledon and dicotyledon. Among them, Codonopsis grossedentata and Euphorbia angustifolia are the most common. Because the weeds in the corn field grow rapidly and grow rapidly, and compete with corn for water, fertilizer and space, it does great harm to the growth of maize at the seedling stage, resulting in thin seedlings and weak seedlings, affecting the yield by up to 10%. Therefore, the planting network has arranged the method of closed weeding in the soil of the corn field, and the following steps are listed for netizens' reference. First, the correct selection of suitable herbicide varieties: 40% suspension emulsion or 48% herbicide can be used, which has the characteristics of new type, safety, high efficiency, low toxicity, low residue and so on. Second, the application time: generally used before the emergence of corn after sowing, or in the early stage after the emergence of corn seedlings. During this period, weeds are in the seedling stage, easy to touch the drug and die, and the effect of spraying after the emergence of weeds will not be ideal. Third, dosage: commonly used dosage, 40% suspension emulsion 165 grams or 48% propoxur suspension 150 ml per mu. However, for mechanical harvesting of plots with higher wheat stubble, the dosage should be increased appropriately, using 40% suspension emulsion 200 grams per mu or 48% propoxur suspension emulsion 175 Mel 200 ml. It is strictly forbidden to ignite wheat stubble to prevent the burning wheat ash from reacting with herbicides and reducing the efficacy. 4. Application skills: it should be used when watering or when there is a high humidity in the field after rainfall, it is best to irrigate immediately after corn sowing, and it can be sprayed 3 days after irrigation. Shake the medicine fully and evenly, then calculate the dosage according to the use area, and take it accurately. First add a small amount of water to dilute the agent into the mother liquid, and then according to the amount of water 40ml / mu 50kg, stir evenly and spray evenly on the soil surface. Spray in order not to damage the film, take the reverse walk, spray while retreating the way. Matters needing attention: 1, it is best to use sprayer, the amount of water should be sufficient, the spray should be uniform, do not re-spray or leak spray, avoid windy weather spray. 2. It is not suitable to use corn seed field and sandy soil when corn is just outcrop, so as to avoid drug damage. 3. A film is formed on the surface after spraying. Do not destroy the film by ploughing. 4. Spray before 10:00 or after 4pm to avoid volatilization or damage to the film. 5. If there is heavy rain within 24 hours after application, it should be sprayed in time. 6. For more plots of Cyperus roxburghii, dimethyl tetrachloride directional spray should be selected in the later stage. 7. Clean the spraying equipment with alkali water in time after spraying to avoid damage to other crops. The effect of thienesulfuron herbicide what weeds can be removed by bentazon herbicide