Weed Control Review in 2019

August 15, 2019

We are done with corn weed control and finishing up soybeans for the 2019 crop year. One step we sometimes try to forget is an end of season assessment of weed control. Over the next few weeks we need to make sure we spend some time out in our fields making a good assessment of how our weed control program worked.

Some questions to ask are:
  1. What were our problem weeds?
  2. Did we do a good job of timely control? (not easy this year)
  3. What weeds escaped
  4. What should we do differently next year? 
One other thing to keep in mind is even if we are off label with most herbicides now, we may not be finished with weed control. Problem weeds such as palmer amaranth or glyphosate resistant giant ragweed may warrant a little bean or corn walking. I know I just aged myself, but I grew up on the farm before the magical days of Pursuit and then Roundup. Walking beans was part of every summer. If you have a few palmer escapes take the time to go out to the field, cut them off and carry the seed heads to the burn barrel/pile. Palmer amaranth is an incredibly prolific growing and reproducing plant. It can and has developed resistance to multiple modes of herbicide action. If you see one---Kill it!!!!
 
For all the concerns of herbicide resistant weeds we still have some good options out there. Multiple passes and herbicide modes of action works in most fields. Planting into a clean field while laying down a foundation of residual herbicide to stop weeds from emerging continues to give good weed control. A post pass to address the weeds that did make it through while putting on another residual product will generally see us through canopy. Keep track of the herbicide modes of actions and vary them to match your current and potential weed issues. This will keep the technologies we have available working in your fields.
 
Make an appointment this fall or winter to visit with your Field Sales Agronomist to review your weed control for the 2019 crop year. Make a weed control plan for 2020 based off your successes and failures this year as well as previous seasons. I can assure you that the weed seed bank in your field is figuring out how they will overcome your plan in 2020.

by Tim Mundorf
 

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Posted: 8/15/2019 8:31:31 AM by Mallory Wittstruck | with 0 comments


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