2019 Spring Farm Outlook

Page 10 2019 Logan County Farm Outlook Magazine Lincoln Daily News March 21, 2019 “Furthermore, the direction the trapped air will move is unpredictable.” The herbicide products are also reported to be easy to use in tank mixes with other herbicide, insecticides, and fungicides on the acceptable to use lists published on the Enlist website. To see the full list for Enlist One visit this page - https://www.enlist.com/en/approved-tank- mixes/enlist-one.html For Enlist Duo another page is available - https://www.enlist.com/en/approved-tank- mixes/enlist-duo.html So, how does this work on the seed side? To use Enlist herbicide the producer must use the Enlist tolerant seed. This is seed that has been genetically modified so that Enlist (chemicals) will kill the weeds in the field without killing the crop. The use of Enlist on non-Enlist seed is not pretty. This image found on the Ohlde Seed company website demonstrates what is going to happen if Enlist is applied to soybeans that have not been modified with the Enlist trait. So what is the ‘trait’ that makes the soybeans resistant? Dr. Bob Hartzler, a professor of agronomy and an extension weed specialist at Iowa University offered a this explanation of the trait. “Dow scientists identified a class of bacterial enzymes (AADs) that metabolize 2,4-D. The gene for this enzyme was inserted into crops, therefore providing resistance to 2,4-D in soybean and greatly increasing corn’s tolerance to this herbicide. The trait is referred to as Enlist.” In his article, “Why in the World is Enlist Corn Resistant to the Fop Herbicides?” Hartzler did note one concern with the new seed corn and accompanying herbicide. He was puzzled by the resistance to Fop herbicides that was bred into the seed. These popular herbicides include Assure II, Fusilade and Hoelon, which are beneficial in the second season when that volunteer corn comes up in the fields. With a resistance to these chemicals Enlist corn that comes up volunteer is going to be a challenge. Hartzler researched further and came up with the following explanation: “Dow scientists identified a version of the AAD enzyme that not only metabolized 2,4-D, but also degrades the ‘fop’ herbicides. This ability is due to the ‘fops’ having a bond nearly identical to one present in 2,4-D. They chose to use this version of the enzyme in Enlist corn due to concerns that glyphosate resistant grasses would be widespread by the time Enlist crops reached the market. This would allow Continue 8