Helm Agro Gains US Approval for Katagon Herbicide Dec 18, 2020 | 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: Helm, Herbicides, Ishihara Sangyo Kaisha, Maize, nicosulfuron, Product Approvals, tolpyralate, USA