Crossbow is a postemergent product that targets woody plants and brush such as blackberries and poison oak, as well as annual and perennial broadleaves, while leaving grasses unharmed. Crossbow achieves excellent control of woody plants and brush and can be applied by all types of sprayers, from hand-held models to tractor-mounted spray rigs. Except for lactating dairy animals there are no grazing restrictions following the application of Crossbow Herbicide. Crossbow is rainfast within two hours