Monterey Weed-Hoe is a 48.3% MSMA product that is widely used in agriculture. It is a postemergence selective grass killer that can be used on lawn areas to control such weeds as Crabgrass, Goosegrass, Nutgrass and Dallisgrass. There are a number of MSMA products on the market, but Monterey Weed-Hoe is the most concentrated.