Trade name(s) Dacthal, Garden Weed Preventer

Manufacturer(s) AMVAC

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