Ronstar Turf and Ornamental Herbicide is a selective, pre-emergent herbicide for the control of certain weeds in Turf or Woody Ornamental Shrubs and Trees in nurseries. 
Ronstar kills weeds prior to emergence from soil and controls germinating weeds for up to 10 weeks giving season-long weed control.
Active Ingredient: Oxadiazon @ 20g/kg