Terbutryn is widely used as a selective herbicide in agriculture, particularly for controlling broadleaf and grassy weeds in crops such as corn, barley, wheat, and sugar beets. It works by inhibiting photosynthesis in susceptible plants, leading to the eventual death of the weed. Due to its effectiveness at low application rates, it is often favored in integrated weed management programs. Terbutryn is also used in non-crop areas like industrial sites and roadways to manage unwanted vegetation. Its residual activity in soil provides extended control, reducing the need for frequent reapplication. Additionally, it has been used in aquatic settings to control algae and submerged weeds, especially in irrigation systems and reservoirs.