Weed Control

C.O.R.N. Newsletter Articles

  1. Seed heads of Palmer amaranth and waterhemp
    Author(s): Mark Loux

    If you don’t already have to deal with waterhemp or Palmer amaranth, you don’t want it.  Ask anyone who does.  Neither one of these weeds is easy to manage, and both can cause substantial increases in the cost of herbicide programs, which have to be constantly changed to account for the multiple resistance that will develop over time (not “can”, “will”).  The trend across the country is for them to develop resistance to any new herbicide sites of action that are used in POST treatments.  Preventing new infestations of these weeds should be of high priority for Ohio growers.  When not adequa

    Issue: 2018-23
  2. Author(s): Elizabeth Hawkins , Author(s): Amanda Douridas

    TPodcastwo new episodes of the Agronomy and Farm Management podcast are available this month. In Episode 3, released June 13th , Dr. Mark Loux provides advice for managing some of Ohio’s toughest weeds! Episode 4, coming June 27th will help prepare you for disease scouting with Drs.

    Issue: 2018-18
  3. Author(s): Mark Loux , Author(s): Jeff Stachler

    It’s definitely a big year for cressleaf groundsel (Senecio glabellus), the yellow-flowered weed that can be seen about everywhere right now.  While it is most often found in no-till corn and soybean fields that have not yet been treated with burndown herbicides, there seems to be an above-average number of wheat and hayfields and pastures with substantial populations. 

    Issue: 2018-14
  4. Author(s): Mark Loux

    This is a revision of an article we seem to publish in C.O.R.N.

    Issue: 2018-11
  5. Author(s): Mark Loux

    Dicamba can have a good fit in spring preplant burndown programs, especially for control of overwintered marestail in fields not treated the previous fall. We typically recommend a preplant burndown that includes at least two herbicides with substantial activity on marestail in this situation, such as Sharpen + 2,4-D or Gramoxone + 2,4-D + metribuzin. Dicamba is the most effective burndown herbicide on glyphosate-resistant marestail in the spring though, and in our research has usually killed or at least stopped emerged marestail in their tracks without help from other herbicides.

    Issue: 2018-05

Publications

  1. 12/2016

    Ohio, Indiana and Illinois Weed Control Guide, Bulletin 789. Publication gives detailed guidance on weed control selections. Numerous tables by crop and application help producers select the best product option for their weed control situation. 

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