Rice is C_3 plant and its companion, noxious weed barnyardgrass is C_4 plant.
水稻为三碳植物，其伴生性恶性杂草稗草为四碳植物。
2
Among of commonly used herbicide of control barnyardgrass in paddy, Molinate, Butachlor, Pretilachlor and Cyhalofop-butyl showed higher toxic reaction for barnyardgrass is resistant to quinclorac.