Weed Slayer Organic Herbicide
Certified organic by WSDA. One quart each of two parts, covers up to one acre at recommended application rates. Registered for commercial use only.
A new systemic organic herbicide that could be a game-changer for perennial weed management in organic agriculture based on initial reports and local experience. Very effective against all grasses (including perennials), and can kill established Canada thistle with heavy or repeat applications.
Part A contains eugenol (clove oil) which is toxic to plant tissues. Part B contains several species of bacteria which form a "bio-surfactant" that enables the eugenol to penetrate plant cells and travel throughout the plant, including the roots.