How to use herbicides in corn fields?

How to use herbicide in cornfield? Which weeding methods can be used in corn fields? Also ask experienced netizens to help introduce that with the continuous development of the aquaculture industry, the demand for corn is also increasing, corn planting is also gradually entering a large scale, and the weeding techniques in corn fields are also diversified. therefore, the farming network has sorted out several weeding methods in corn fields, which are listed in detail below for netizens' reference. Method 1. Soil closed weeding method: soil closed weeding technology has always been the main method used in corn field weeding. One application of weeds before weeds are unearthed can effectively control the damage of weeds during the whole growth period of corn. The key points of using closed herbicide technology are as follows: 1. Herbicide varieties should be selected correctly: varieties with the characteristics of new type, safety, high efficiency, low toxicity and low residue should be selected. 2. Use time: after sowing, before emergence, or in the early stage after emergence. 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. 3. Use dose: commonly used dose, use the recommended dose according to the instructions. However, the amount of mechanically harvested plots with higher stubble can be increased appropriately. It is strictly forbidden to ignite wheat stubble to prevent the burning wheat ash from reacting with herbicides and reducing the efficacy. 4. Usage: it is best to use it when there is a high humidity in the field after watering or rainfall, and it is best to irrigate immediately after corn sowing. 3 days after irrigation. When mixing the medicine, shake it evenly, then calculate the dosage according to the use area, and take it accurately. Spray in order not to damage the film, take the reverse walk, spray while retreating the way. Precautions for closed weeding in corn field: first, it is best to use a sprayer, the amount of water should be sufficient, the spray should be uniform, do not re-spray or leak spray, and avoid windy weather spray; second, it is not suitable to use corn seed fields and sandy soil in order to avoid drug damage; third, a film is formed on the surface after spraying, so as not to destroy the film by ploughing. Fourth, spraying before 10:00 in the morning or after 4 p.m., it is better to avoid liquid volatilization or damage to the film; fifth, in case of heavy rain within 24 hours after spraying, you should make up spraying in time; sixth, more plots of Cyperus should be used in the later stage to use effective agents for directional spray prevention; seventh, clean the spray equipment with alkali water in time after spraying to avoid injury to other crops. Method 2. The method of spraying weeds on stems and leaves: generally in the 3-5 leaf stage of maize and 3-5 leaf stage after the emergence of weeds. North China summer corn field uses 38% atrazine 1500 ml plus 25% Baocheng 60 grams per hectare, northeast spring corn field uses 38% atrazine 2250 ml plus 25% Baocheng 75 grams per hectare, add water 450L, spray evenly. The herbicidal effect can be improved by adding Nonionic surfactant or neutral detergent with spray volume of 0.1% Mel 0.2%. At the 3-5 leaf stage after emergence, the monocotyledonous weed laggard 2 leaf stage, the dicotyledonous weed 2 leaf stage, the available 40% atrazine water suspension emulsion 3000,3750ml per hectare, or 4% Yunongle water agent 1200-1500 ml, or 50% du A mixture 3000 ml, or 38% atrazine gel suspension 2250 ml plus 48% Rasol EC 1800-2250 ml, or 38% atrazine gel suspension 2250 ml plus 33% Zancaotong EC 1500 ml Or 38% atrazine gel suspension 2250 ml plus 4% Yunongle water agent 900ml. Or 38% atrazine gel suspension 1800 ml plus 48% Baicao enemy water agent 300ml, add water 750kg uniform spray. For example, in corn fields with heavy occurrence of broad-leaf weeds, 75% Juxing (broad-leaf net) dry suspension agent can be used for 15 grams per hectare during the 4-6-leaf period of corn. Or 75% Baoshou (broad leaf powder) 15g, or 48% Baicao water agent 375ml 450ml, or 72% 2 mine4-butyrate EC 750ml, or 22.5% accompany agricultural EC 1200-1500 ml, or 20% make it emulsifiable concentrate 750ml-900ml, add 450L water, spray evenly. Grass shortage occurs in the middle and late stages of corn growth, using 20% of a handful of hot water agent 3 liters, or 10% glyphosate water agent 9-12 liters, or 41% first hand water agent 3-4.5 liters plus 450 liters of water, add a protective cover on the sprinkler and spray weeds directionally. Try to avoid spraying the liquid on the stems and leaves of corn. Method 3. No-tillage weeding method: the mixture of Yi A mixture and farmer Le is an ideal herbicide for sowing corn fields with stubble under no-tillage. The herbicide has a wide herbicide spectrum and remarkable efficacy, which can not only control all the weeds that have emerged, but also control or control the annual Gramineae and broad-leaved weeds that propagate by seeds at the end of emergence. The effect period is long, and one application can ensure that the whole growing season is free from weeds, and it is safe for the current season and the following crops. After wheat harvest and before corn sowing, use 2250-3000 grams of ethyl A mixture per hectare plus 74.7% farmer Le 600,900g, 450L of water, the height of the sprinkler should be 30cm higher than the weeds, spray evenly. Method 4. The method of weeding with plastic film mulching: in the spring corn field with low temperature and drought, plastic film mulching cultivation technology is often used to increase soil temperature and protect soil moisture, so as to promote the emergence and growth of maize seedlings. Because of the high temperature and humidity in the plastic film, it is very beneficial to exert the efficacy of herbicides. Therefore, compared with the application in the open field, the lower dosage of herbicides (generally less than the conventional dosage by 1 inch, 4 cycles, 1 stroke, 2) can achieve a good herbicidal effect. Per hectare, 40% atrazine water suspension emulsion 1800-2250ml, or 50% Acetochlor EC 750ml-1050 ml, or 72% dour EC 900ml-1200ml, 90% Hornez EC 600ml 750ml, or 48% Lasol EC 2250 ml, or 33% herbicide EC 1500-2250 ml, after corn sowing was suppressed, add water 450-750L, spray evenly, and then cover the soil with film. If the seedling belt is applied, the dosage should be calculated according to the actual application area. What is paraquat? Methods of improving the efficacy of glyphosate