Which herbicides can be selected for weed control in tobacco fields?
Which herbicides can be used for weed control when growing tobacco? Please explain. Tobacco seeds are small, and seedlings grow slowly, so they are often harmed by weeds. The main weeds include: green foxtail, Chinese sprangletop, late barnyardgrass, goosegrass, shortawn foxtail, cocklebur, flatsedge, cleavers, common chickweed, plantain, dandelion, and others. Weed control in tobacco fields...
Which herbicides can be used for weed control when growing tobacco? Please explain.
Tobacco seeds are small, and seedlings grow slowly, so they are often harmed by weeds. The main weeds include: green foxtail, Chinese sprangletop, late barnyardgrass, goosegrass, shortawn foxtail, cocklebur, flatsedge, cleavers, common chickweed, plantain, dandelion, and others.
Weed control in tobacco fields can be divided into seedbed control and field control. And 50% napropamide wettable powder is the best choice for controlling weeds in tobacco fields. According to efficacy trials conducted by some pesticide inspection institutes, the comprehensive fresh weight control efficacy of 50% napropamide wettable powder on weeds in tobacco fields reaches more than 90%, basically controlling the harm of weeds to tobacco.
According to the different growth stages of tobacco fields, the specific application methods and dosages differ:
1. When controlling weeds in seedbeds, pre-sowing soil treatment is generally used, that is, 3-5 days before sowing, with a dosage of 100-120 g/667 sq m, mixed with 50 kg of water, fully shaken, and evenly sprayed on the soil surface of the seedbed, then harrowed and mixed into the soil to a depth of 5 cm, followed immediately by sowing. A post-sowing pre-emergence application method can also be used, that is, 50% napropamide wettable powder at 100-150 g/667 sq m, mixed with 50 kg of water, fully shaken, and sprayed on the soil surface.
2. When controlling weeds in tobacco fields, soil treatment can be carried out before transplanting. 3-5 days before transplanting, use 50% napropamide wettable powder at 100-200 g/667 sq m, mixed with 50 kg of water, and evenly spray the entire field soil surface, then within 3-5 days harrow and mix into the soil to a depth of 5 cm, followed immediately by transplanting. In addition, post-transplanting spray treatment can also be used. Within 5-7 days after transplanting, once the tobacco seedlings have established, use 50% napropamide wettable powder at 100-150 g/667 sq m mixed with 50 kg of water and evenly spray the soil surface of the seedling band.
50% napropamide wettable powder has high activity, and the dosage is only half that of Devrinol, with a greater margin of safety. It is safe for the growth and development of tobacco seedlings and has a significant yield-increasing effect. After application, it is adsorbed by the soil and will not be washed away by rain or leach out. Its half-life in soil is 15 days, with no environmental pollution. It is safe for the crop used and for subsequent crops such as wheat, cotton, soybean, peanut, and many other crops. However, crops such as sugar beet, celery, sorghum, corn, and fennel are relatively sensitive to napropamide, so fields treated with the herbicide should not be planted with these crops within 3 months. Please take note when using.
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