S-Metolachlor is widely used as a selective pre-emergence herbicide in agriculture, particularly for controlling annual grasses and broadleaf weeds. It is commonly applied in crops such as corn, soybeans, and sorghum, where it provides effective weed management before weeds emerge from the soil. Its mode of action involves inhibiting the growth of weed seedlings by disrupting cell division in roots and shoots. Due to its high efficiency at low application rates, it helps reduce soil erosion and supports conservation tillage practices. S-Metolachlor is favored for its favorable environmental profile, including relatively low soil persistence and minimal impact on non-target plants when used as directed.