Amides are highly selective cupping herbicides, mainly used in seedling fields or direct seeding fields. They are effective drugs for the control and removal of barnyard grass, as well as other gramineae and dicotyledon weeds, such as parsley, water hemlock, datang and dogtail grass. Propanil is almost not transfected in the plant body, but only works at the point of contact.Its mechanism of action is various, not only destroy plant photosynthesis, but also inhibit respiration and oxygen phosphorylation, interfere with nucleic acid and protein synthesis.