Albaugh Surmise Pro Non-Selective Herbicide 2.5 GallonSurmise Pro is a post emergent, non selective, herbicide that mixes readily with water to be applied as a spray for the control of broadleaf weeds and grasses. A group 10 herbicide (glutamine synthetase inhibitor), Surmise Pro is a foliar active material with little or no soil residual activity. Visual results showing necrosis of leaves and young shoots occur within 2 to 4 days after application under good growing conditions. Surmise Pro is rainfast