Eraser 41% is great for non-selective broad-spectrum control of annual and perennial weeds, woody brush and trees. This post-emergent systemic herbicide has no residual soil activity, and is relatively non-toxic to dogs and other domestic . Use 1 1 / 3 Ounces per gallon of water to control most annual weeds; use 2 2 / 3 Ounces to control most perennial weeds.It is generally non-selective and gives broad spectrum control of annual and perennial weeds, woody brush and trees. It is formulated as a water-soluble liquid.