How to apply herbicide in paddy field?

How to apply herbicides to paddy fields? Please advise one, to choose the weeds in the most sensitive period of herbicide application, in order to improve the weeding effect. 2. To ensure the safety of rice seedlings, it is necessary to select the growth period with the strongest resistance to herbicides. Generally speaking, weeds are most sensitive to herbicides at seed germination stage and seedling stage, at which time herbicides are most likely to exert their efficacy; rice is most sensitive to herbicides at bud stage and before 4-leaf stage, which is easy to cause phytotoxicity. The concentration of herbicides applied at these growth stages should be noted. 3. The application time of herbicide must be combined with the transplanting time of rice. For example, prometryne must be applied 15~20 days after rice transplanting. When the leaves of toothgrass change from red to green, the application effect is best. If it is used to control common weeds, the best effect must be 10~15 days after rice transplantation. Soil sealing treatment is the main method of transplanting rice field, usually mixed with soil or green fertilizer 3~7 days after transplanting to control barnyardgrass, annual broadleaf weeds and cyperaceae weeds. If benzyl dichloride is used, it can be sprayed 2~3 weeks after transplanting. Click to get mass herbicide application technology Click to get mass pesticide application technology Click to get mass rice planting technology