Many growers will be starting the 2019 planting season with fields that have not had a lot of work done on them. A late harvest kept many from a fall weed control program, and wet conditions this spring may delay early pre-plant field work. Alan Kurtz, with Bayer in Marshall County, IN, recommends a two pass weed control program.
“Typically, this means an application around the time of planting and another application post-emergence.” He added this does not include a burndown application that many growers may need to do this year to get fields ready to plant.
Kurtz says the advantage is that a two pass program gives you two chances to kill weeds and the opportunity to mix modes of action to prevent weed resistance. “Being able to do something pre and post gives us more opportunities to mix different modes of action,” he states. “For example, in our Pre product lineup, we have up to 6 different modes of action that we can use; and, in our post products, we have up to 7 modes of action we can use.”
Kurtz says research shows that a tank mix is a more effective method for mixing modes of action, “Research out of Illinois shows that you are 83% less likely to develop weed resistance when you combine modes of action in a tank mix vs. applied initially or at different times.” For more recommendations on your weed control program, see your Bayer representative.