Acclaim Extra Herbicide offers reliable postemergence control of crabgrass and goosegrass without harming cool-season turf. Rainfast in one hour, Acclaim Extra is most effective when weeds are young and actively growing. It can also be used to temporarily suppress the growth of Johnsongrass (rhizome stage) and common bermudagrass.Can work in a single treatment. See results in as fast as one week. Systemic activity, rapidly absorbed through the foliage. Effective in a wide range of growth stages.