Amiprofos methyl is primarily used as a herbicide in agriculture to control a wide range of weeds in various crops. It is particularly effective in preventing the growth of annual grasses and broadleaf weeds in fields of rice, soybeans, and other crops. The chemical works by inhibiting cell division in the roots and shoots of young weeds, thereby stopping their growth and development. Its application is typically done through soil treatment before or during the early stages of crop planting, ensuring that the weeds are controlled without affecting the main crop. This makes it a valuable tool for farmers seeking to enhance crop yield and quality by minimizing weed competition for nutrients, water, and sunlight.