Quali-Pro® 83013884 50 lb Oxadiazon 2G Herbicide Granules - Oxadiazon 2G is a selective, pre-emergent herbicide for control of annual grasses and broadleaf weeds in turf and woody ornamental shrubs, vines and trees. This product can be applied to both established and newly transplanted plants, and both actively growing or dormant plants. It is effective against bittercress, carpetweed, annual bluegrass, crabgrass, common groundsel, petty spurge and barnyard grass.