Fluridone is primarily used as an aquatic herbicide to control a wide range of invasive and nuisance aquatic plants in lakes, ponds, reservoirs, and irrigation canals. It effectively targets submerged and floating plants such as hydrilla, Eurasian watermilfoil, and duckweed, which can disrupt ecosystems, hinder water flow, and interfere with recreational activities. The chemical works by inhibiting carotenoid biosynthesis, leading to chlorophyll degradation and eventual plant death. It is often applied in slow-release formulations to ensure long-term control while minimizing environmental impact. Fluridone is also used in some agricultural settings to manage weeds in rice fields and other crops, providing selective control without harming the desired plants. Its application requires careful monitoring to maintain effective concentrations and avoid unintended effects on non-target species.