Trade name(s) Dacthal, Garden Weed Preventer
Formulation(s) 75% wettable powder, 25% and 5% granule, 6 lb flowable
Remarks A soil-active, preemergence, selective herbicide. Must be applied to soil before weed seeds germinate. Moisture needed to activate. Not foliage active.
Water solubility 0.5 ppm
Storage conditions Stable when kept dry.
Acute toxicity LD50 - greater than 3,000 mg/kg
Action in plant Inhibits mitosis in roots and shoots.
Site of action Group 3: microtubule assembly inhibitor
Chemical family Phthalic acid
Koc Average is 5,000 mL/g