Grass damage is one of the factors restricting the high and stable production of corn. The annual weeds in corn fields in China have an area of ​​more than 350 million mu, which can cause corn loss of about 9.5 billion kilograms per year. In recent years, weeds in corn fields have become more serious due to the lack of no-tillage areas, which poses a serious threat to corn production. It has been forecasted that weeds in the corn field will appear to be overweight this year, with an area of ​​about 350 million mu. In view of the occurrence of local weed species and their hazard characteristics, we should adopt a comprehensive control strategy based on the prevention of agricultural weeding, focusing on “closure and killing†chemical weed control, artificial and mechanical control as a supplement, and coordinated measures to effectively control the corn fields. Weed damage. Reasonably choose the herbicide variety on the road. All regions must correctly select herbicide varieties based on planting structure, corn planting varieties, weed species, herbicide variety characteristics, soil types, and weather conditions. Weeding and weeding before sowing. Before the corn sowing, weeds germinate more land, and we can use herbicides such as paraquat, glyphosate and glufosinate to spray and weed. After weeding, the soil was closed and weeding. Promote the use of 90%, 99% acetochlor EC, 72%, 96% SME, 90% Atrazine Water Dispersion Granules, 38% Atrazine Suspension, 25% thifensulfuron wettability Powder, 87.5% 2,4-D Isooctyl Ester, 57% 2,4-D Butyl Ester, 90% Acetochlor or 96% Metomidamine + 75% Thifensulfuron, 67% Isopropyl-apatite suspension concentrate, 40% acetylcholine emulsifiable concentrate, 50% oxazinone acetochlor EC, etc., sprayed evenly on water before seeding. Corn post-emergence weed stems and leaves spray weeding. Promote the use of 30% benafazopirone suspension, 10% mesotrione suspension, 4%, 6%, 8% nicosulfuron suspension, 90% atrazine water dispersible granules, 38% Suspension concentrate, 25% octanoic benzonitrile EC, indolsulfurin, nicotinamide, mitogen-free compound, atrazine and benazepam, nicosulfuron and octanoic benzonitrile, In the 3 to 5 leaf stage of corn, weed 2 to 4 leaf stage, spraying water evenly. Nicosulfuron can not be used in sweet corn, waxy corn and popcorn fields, and can not be mixed with organic phosphorus pesticides. Organic phosphorus pesticides can not be used within 7 days before and after treatment. Mid-late weeding. For a variety of reasons for the growth of weeds in the middle and late stages of corn growth, 20% paraquat aqueous solution and 25% sulfosulfuron-methyl water dispersible granules can be used for directional spraying between corn rows. The spray nozzles should be protected when spraying. Cover to avoid splashing on corn plants to produce phytotoxicity. The use of vegetable oil-type spray adjuvants for the rational selection of vegetable oil-based spray adjuvants can increase the herbicidal effect, reduce the herbicide dosage, reduce the amount of spray water, reduce droplet drift, and provide crop safety. Controlling weeds around corn fields Weeds in the surrounding corn fields are numerous and occur in large quantities. Weeds include grasses, sedges, and broad-leaved weeds. These include annual, weed-infested weeds, and perennial weeds. These weeds not only become breeding grounds for some pests, but also provide a large number of provenances for the occurrence of weeds in farmland in the next year. Can be used to plant leguminous crops, etc., to inhibit the occurrence of weeds; can also be removed manually, or the use of glyphosate, paraquat, glufosinate and other herbicides for control. Vigorously promote the application of herbicides. The application of herbicides should be fan-shaped nozzles. When applying pesticides, they must walk straight in the direction of the wind. Spraying machines should be calibrated prior to spraying and knapsack spraying should not be applied during knapsack spraying. The “secondary dilution method†should be used when configuring the pharmaceuticals, and the pesticide application should not be performed when the wind is more than 3 levels. To ensure the quality of spray, spray requirements uniform and thoughtful, according to the degree of soil moisture and the degree of weeds in the field increase or decrease the amount of liquid, constant spray amount of liquid per acre of about 30 to 45 liters, mechanical spray can increase the amount of liquid. It is necessary to properly handle the pesticide residue in the sprayer after spraying to avoid polluting the environment and crop damage, and at the same time, pay attention to the personal protection of the sprayer. Podiatry Products,Podiatry Equipment,Single Use Podiatry Instruments,Disposable Podiatry Instruments ZHEJIANG FOMOS MEDICAL TECHNOLOGY CO.,LTD. , https://www.ifomos.com
Scientific prevention and control to deal with corn grass injury