Selective pre-emergence treatment, direct-water rice fields and Putian-specific amide herbicides.
The performance is easily soluble in most organic solvents. Moderately irritating to eyes and skin.
The use of pretilachlor has a good control effect against weeds such as barnyardgrass, duckweed, mother grass, and algae. However, it is less effective for perennial tripods. In the direct broadcast rice fields and Putian, the recommended dosage of 30% EC is 1050~1650 ml/ha. In the southern tropical or subtropical rice area and indica rice production area, the lower limit of the recommended dose is generally adopted according to the density of weeds in the field. Treatment can be carried out on the day after sowing (priming) or 4 days after sowing. The soil should be kept saturated with water at the time of application, and there is a water film on the surface. 24 hours after the drug can be filled with shallow water, do not make the topsoil dry. Normal field management resumed after 3 days. The temperature in the cold and temperate zones in the north is low, and the growth of rice is slow. If medicine is used soon after sowing, rice is not taken up because it is not rooted, it has no absorption ability for safeners and it is prone to phytotoxicity. If it is applied after drying in the field, although rice seedlings are safe, because weeds are too large, other weeds occur one after another. May reduce weeding. Therefore, grasping the appropriate period of application is the key to exerting the efficacy. The rice seedlings should have been rooted before the 1.5th leaf stage of barnyardgrass (2-leaf stage), that is, 10-15 days after sowing, and the recommended dose should be adopted. Cap. When wetting the seedlings, soaking (seeding) the bed covers 1 cm of soil. Immediately after spraying, cover the plastic film and keep water around the bed. Not only the weeding effect is good, but also the seedling quality is good.
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