Atrazine
Type: Herbicide
Mode of Action: Inhibiting photosynthesis
Common Product Names: AAtrex
What is it?
Atrazine is a triazine herbicide that has been widely used since its introduction in the 1950s. It is a white, crystalline solid that is moderately soluble in water. Atrazine is primarily a systemic herbicide and has selective action, meaning it targets specific weeds without harming certain crops. It has both post emergence and pre emergence affects. Atrazine is applied to the soil or foliage to control a variety of broadleaf and grassy weeds, particularly in crops like corn, sugarcane, and sorghum. Its long residual activity makes it effective for season-long weed control.
How does it work?
Atrazine works by targeting and inhibiting the photosynthetic process in susceptible plants. When applied, it is absorbed through the roots and leaves of the plants. Once inside, Atrazine binds to the D1 protein in photosystem II, blocking the electron transport chain. This disruption halts the production of ATP and NADPH, essential molecules for energy transfer in plants. Without these molecules, the plant cannot synthesize the carbohydrates needed for growth and development, leading to its eventual death. The effect of Atrazine on weeds can be observed within days to weeks after application, depending on environmental conditions and weed species.