To really get to the root of the problem and stop perennial weeds coming back you need to kills the unseen roots too and not just burn off the leaves glyphosate is the proven chemical of choice the world over for broad spectrum weed controlr this larger 3l pack contains a lance sprayer application system for easier application to larger areas or for spot treatment once applied the glyphosate is slowly absorbed by the weed and moves systemically through the plant down to the roots as