Diflumidone is a selective herbicide primarily used in rice cultivation to control a broad spectrum of weeds, including broadleaf weeds and sedges. It belongs to the sulfonylurea class and works by inhibiting acetolactate synthase (ALS), an enzyme essential for the biosynthesis of branched-chain amino acids in plants. This disruption prevents weed growth and leads to their eventual death, while rice crops remain largely unaffected due to their tolerance. Applied post-emergence by foliar spray during early weed growth stages, diflumidone helps maintain crop yields by reducing competition for nutrients, water, and light. It is suitable for large-scale paddy fields and can be tank-mixed with other herbicides for enhanced broad-spectrum control. Adherence to label instructions is vital to minimize environmental impact and ensure applicator safety.