Flucetosulfuron can be used as soil and stem and leaf treatment, and has a wide herbicidal spectrum, including annual broad-leaved weeds, sedge weeds and some grass weeds, as well as some perennial weeds, such as barnyardgrass and barnyardgrass , barnyardgrass, long awn barnyard grass, barnyardgrass and other barnyardgrass weeds, broad-leaved weeds such as Cigu, Alisma, and duck tongue, and Cyperaceae weeds such as heteromorphic sedge, oxfelt, and sunshine fluttering grass. In the direct seeding paddy field, when the barnyard grass is at the 2-5 leaf stage (it can also control the older barnyardgrass with more than 7 leaves), add 30-50 kg of water, apply the medicine by spraying, drain the water in the field area before applying the medicine, and transplant the paddy field in 5~15d after rice transplanting (1.5~3 leaf stage of barnyardgrass), adopt poisonous soil method, mix 30~50kg of soil, spread or spread with green manure, and keep water for 3~5d. The lasting effect period on barnyardgrass is 30~40d, which is significantly longer than that of chlorfenapyr and pyrazosulfuron. Therefore, a single application can ensure that there is no barnyardgrass damage in the whole rice growing season, and no medicine for subsequent crops. harmful effect.