Weedmaster Duo Herbicide 20L (Nufarm)Weedmaster Duo is an innovative Dual Salt Technology glyphosate formulation for use in the control of annual, perennial and aquatic weeds Active ingredient(s): 360 g L glyphosate present as the isopropylamine and mono ammonium salts. Unlike other 360 gm glyphosate formulations, Nufarm weedmaster DUO contains two salts to improve plant uptake. The result is, better weed control that also gives you extra flexibility thanks to its enhanced tank mix