Teach you how to properly weed tobacco fields

Tobacco plants have small seeds and a slow germination process, making them vulnerable to weed competition. Common weeds found in tobacco fields include foxtail, thousand gold, early glutinous rice, beef tendon grass, maiden, urn, sedge, pigweed, sorghum, plantain, dandelion, and more. Weed control in tobacco fields can be divided into two main stages: seedbed management and field management. Among the available herbicides, 50% dichlorpyrifos wettable powder (produced by Sichuan Chuan'an Chemical Factory) is considered one of the most effective options for controlling weeds in tobacco crops. According to the China Pesticide Network, the comprehensive fresh weight control effect of 50% dichlorpyrifos WP on weeds in tobacco fields exceeds 90%, effectively reducing the damage caused by weeds. The application method and dosage vary depending on the growth stage of the tobacco plants: 1. For seedbed weed control, it is generally recommended to apply a pre-emergence soil treatment before sowing. This should be done 3–5 days prior to sowing, using 100–120 g per 667 m² mixed with 50 kg of water. The mixture should be well shaken and evenly sprayed over the soil surface, then incorporated into the top 5 cm of soil before seeding. Alternatively, post-emergence application can be done after the seedlings have emerged, using 100–150 g per 667 m² in 50 kg of water, applied directly to the soil surface. 2. In the field, pre-transplant soil treatment is commonly used 3–5 days before transplanting. Apply 100–200 g of 50% dichlorpyrifos WP per 667 m² in 50 kg of water, spray evenly across the field, and mix it into the top 5 cm of soil. After transplanting, a second application can be made 5–7 days later, once the seedlings have established. Use 100–150 g per 667 m² in 50 kg of water, and spray the solution onto the soil surface. 50% dichlorpyrifos wettable powder has high efficacy, with a dosage that is only half of Dahuili. It offers a higher safety margin, ensuring the safe growth of tobacco seedlings. It significantly increases yield, and once applied, it binds strongly to the soil, resisting washout by rain or leaching. Its half-life in the soil is approximately 15 days, and it does not cause environmental pollution. It is safe for crops such as wheat, cotton, soybeans, and peanuts. However, according to the China Pesticide Network, certain crops like beet, celery, sorghum, corn, and fennel are more sensitive to dichlorpyrifos. Therefore, it should not be used on these crops for at least three months. Always read the label carefully and follow the instructions when applying this herbicide to ensure both effectiveness and safety.

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