CTNBio Approves Corteva Multiple HT Cotton Oct 18, 2018 | 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 14 + 1 equals?* Remember Me Forgot Password Tags: 4-D tolerance, Brazil, Corteva, Cotton, Cry1Ac, Cry1F, Glufosinate Tolerance, Insect Resistance, Regulatory, Vip3A19