What herbicide is good for weeding in rice fields?

According to the application scope and control object of herbicides, herbicides were selected in rice fields. ① Herbicides such as tetrazole, butachlor and pretilachlor are required to be used below the leaf stage of barnyard grass 1.5 and above the leaf stage of rice 1.5, so they are not suitable for direct seeding fields. ② Dichloroquinic acid has a good control effect on the older barnyard grass, but if it is used before the 2.5-leaf stage of rice, it is easy to cause phytotoxicity to rice. (3) Herbicide, thiabendazole, chlorfenapyr, prometryne, glyphosate, cyclohexylimide, etc. In the first 2-3 years after changing from drought to water in sandy soil, it quickly seeps into the soil and directly reaches the rice root system, which is prone to phytotoxicity and is not suitable for use. (4) Butachlor, 2- methyl -4- chlorine, prometryne and chlorhexidine, which are unsafe for rice, can be used in the south, but not recommended in the north. ⑤ Herbicides include pretilachlor, cypermethrin, oxadiazon, fenoxaprop-p-ethyl, herbicides, herbicides, quinclorac, cyhalofop-ethyl, etc. However, pretilachlor, butachlor, cypermethrin, oxadiazon and herbicide cannot be used in direct seeding fields. ⑥ Herbicides for controlling broadleaf weeds and Cyperaceae weeds include pyrazosulfuron, bensulfuron, cyclophosphamide, cinosulfuron, ethisulfuron, 2- methyl -4- chlorine, bentazone, etc. ⑦ For general sandy soil or leaky fields, herbicide should be treated with stems and leaves, and for fields with good water retention, herbicide can be sprayed.