EPA Approves FMC’s Authority Maxx Herbicide. Sep 24, 2013 | Agrochemicals, News Your subscription level does not currently cover this area of our services. Please contact us to find out how to gain access. Username or E-mail Password * Remember Me Forgot Password Tags: Chlorimuron, FMC, Herbicides, North America, Product Approvals, Soybean, sulfentrazone, USA