2,4-Dichlorophenoxyacetic acid is widely used as a selective herbicide to control broadleaf weeds in agricultural fields, lawns, and turfgrass. It effectively targets unwanted plants while leaving grasses and crops like corn, wheat, and rice unharmed. In forestry, it aids in managing vegetation to promote the growth of desired tree species. Additionally, it is employed in aquatic environments to control invasive weeds in lakes and ponds. Its role in plant research includes inducing cell elongation and studying plant growth regulation. However, its application requires careful handling to minimize environmental impact and ensure safety.