Atrazine 4L is a pre- and post-emergent herbicide for the control of various annual broadleaf and grass weeds. Use Sites: Non-crop and crop areas, lawns, turf. Effective Against: Annual Bluegrass, Barnyardgrass, Buttonweed, Chickweed, Cocklebur, Crabgrass, Foxtail, Henbit, Kentucky Bluegrass, Knotweed, Mustard, Pigweed, Poa Annua, Purslane, Ragweed, Sandspur, Sicklepod, Spurge, Spurweed, Sunflower, Swinecress, Switchgrass, Various Annual Clovers, Velvetleaf, Witchgrass, Woodsorrel. Active Ingredients: Atrazine 42.9%.