Southern Ag Atrazine St. Augustine Weed Killer, 128oz &ndash; 1 Gallon Size: 1 Gallon Low, economical use rate of 1 to 4 pints per acre. Controls many broadleaf weeds ; woody plants Use in turf, pastures, rangeland, ditch banks, fences. USE ON: Certain grasses in lawns, parks, golf courses, and pastures; fences, ditch banks, non-crop sites, small grains, and corn (pre and post emergent herbicide) For large quantity discount consideration or to request a mixed multi-pack, please message us.