Trade name(s) Chipco Ronstar G, Ronstar, Ornamental Herbicide, Oxadiazon

Manufacturer(s) Bayer CropScience, O.M. Scott

Formulation(s) 2% and 4% granular, 2 lb/gal emulsifiable concentrate, 50% wettable powder

Remarks Selective preemergence control of annual grasses and broadleaf weeds in turf, woody ornamental shrubs, vines, and trees.

Water solubility 0.7 ppm

Storage conditions Stable under moderate conditions.

Acute toxicity LD50 - 8,000 mg/kg

Action in plant Controls weed seedlings by contact action during emergence.

Site of action Group 14: protoporphyrinogen oxidase inhibitor

Chemical family Oxadiazole

Koc Average is 3200 mL/g. Strongly absorbed by soil colloids and OM.