Tobacco has small seeds and slow growth of seedlings, which are often endangered by weeds. Weeds mainly include: foxtail, thousand gold, early glutinous rice, beef tendon grass, maiden, urn, sedge, piglet, sorghum, plantain, dandelion, etc. Control of weeds in tobacco fields can be divided into seedbed control and field control, while 50% dichlorpyrifos wettable powder (produced by Sichuan Chuan'an Chemical Factory) is the best choice for controlling weeds in tobacco fields. According to the pesticide network , the comprehensive fresh weight control effect of 50% dichlorfen WP on tobacco field weeds is over 90%, which basically controls the harm of weeds to tobacco.
Specific pesticide use methods and dosages are different for different growth periods of tobacco fields:
1. When weeding seedbed weeds, generally use soil treatment before sowing, that is, 3 to 5 days before sowing, the dosage is 100-120 g/667 m2, 50 kg of water, fully shaken, evenly sprayed on the surface of the soil. 5cm deep mixed with soil, then seeded; can also be used after sowing seedlings before application, that is, 50% dichlorpyrifos wettable powder 100 ~ 150g / 667m2, 50kg water, fully shaken and sprayed on the surface.
2, in the control of tobacco field weeds can be treated before the transplanted soil, 3 to 5 days before the seedlings, with 50% dichlorfen WP 100 ~ 200g / 667m2, 50kg water, evenly sprayed in the whole field 3 to 5 days, the soil is mixed 5cm deep, and then the seedlings are moved; in addition, the seedlings can be sprayed after spraying, and within 5 to 7 days after the seedlings are moved, the tobacco seedlings have survived, using 50% dichlorpyrifos wettable powder 100-150g /667m2, 50kg water, evenly sprayed with seedlings on the surface. 50% diclofenac wettable powder has high activity, the dosage is only half of Dahuili, the safety factor is larger, the growth and development of tobacco seedlings is safe, the yield increase effect is remarkable, the soil adsorption after application is not washed away by rain. Or leakage, the half-life in the soil is 15 days, no environmental pollution. It is safe for crops and crops such as wheat, cotton, soybeans and peanuts. Tips for China Pesticide Network : Beet, celery, sorghum, corn, fennel and other crops are more sensitive to dichlorfen. It is not suitable for planting in 3 months. Please pay attention when using.
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