Tobacco has small seeds and slow seedling growth. It is often controlled by weeds. The control of weeds in tobacco fields can be divided into seedbed control and field control. The use of 50% Napropamide wettable powder is the best choice for controlling weeds in tobacco fields. According to the pesticide efficacy test conducted by the provincial-level pesticide inspection institute, the comprehensive fresh weight control effect of 50% Napropamide WP on weeds in tobacco fields has reached 90% or more, and basically controls the damage of weeds to tobacco. For different growth periods of tobacco fields, the specific use methods and dosages are different: 1. When controlling weedy weeds, soil treatment before sowing is generally adopted, that is, 3 to 5 days before sowing, the dose is 100 to 120 grams. / Mu, watered 50 kg, fully shaken, evenly sprayed on the surface of the surface of the mulberry, ramming the soil 5 cm deep, then sowing; can also be used before planting seedlings after sowing method, that is, with 50% Napropamide can be Wet powder 100 ~ 150 grams / acre, watered 50 kg, fully shaken and sprayed on the surface. 2, control tobacco field weeds can be transplanted in the soil before the treatment, in the transfer of seedlings before 3 to 5 days, with 50% Napropamide WP 100 ~ 200 grams / acre, watered 50 kg, uniform spray in the whole Field soil surface, 3 to 5 days of pounding soil 5 cm deep, then transplant seedlings; can also be transplanted after the seedling spray treatment, in the transplant seedlings 5 ​​to 7 days after the seedlings have survived, with 50% Napropamide wettable powder 100-150 g/mu, watered 50 kg, evenly sprayed with surface. 50% Napropamide WP activity is high, the dosage is only half that of Dahuili, the safety factor is greater, the growth and development of the tobacco seedlings is safe, and the yield increase effect is significant. After the pesticide application, the soil is adsorbed and will not be washed away by the rain. Or leakage, the half-life in the soil is 15 days, no environmental pollution. It is safe for crops and post-crop crops such as wheat, cotton, soybeans, and peanuts. However, crops such as sugar beets, celery, sorghum, corn, and fennel are more sensitive to Napropamide, and it is not appropriate to plant them within 3 months.
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