Diquat is widely used as a herbicide for controlling weeds in both agricultural and non-agricultural settings. It is particularly effective in managing aquatic weeds in water bodies such as ponds, lakes, and irrigation channels, where it helps to prevent the overgrowth of vegetation that can disrupt water flow and ecosystem balance. In agriculture, diquat is applied to crops like potatoes, soybeans, and cotton to desiccate plants before harvest, facilitating easier and more efficient harvesting. It is also used in non-crop areas, such as industrial sites, railways, and roadsides, to control unwanted vegetation and maintain clear pathways. Additionally, diquat is employed in horticulture for weed management in ornamental plants and nurseries. Its fast-acting nature makes it a preferred choice for quick weed control, though its use requires careful handling due to its toxicity to humans and the environment.