Southern Ag Atrazine St. Augustine Weed Killer, 32oz &ndash; 1 Quart Size: 1 Quart Low, economical use rate of 1 to 4 pints per acre. Controls many broadleaf weeds and woody plants. Use in turf, pastures, rangeland, ditch banks, fences. For large quantity discount consideration or to request a mixed multi-pack, please message us.