USDA Deregulates Corteva’s DP202216 Maize Dec 18, 2020 | Biotechnology, 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: Corteva, Glufosinate Tolerance, Herbicide Tolerance, Maize, Regulatory, USA, Yield Enhancement