C.O.R.N. Newsletter

  1. Author(s): Mark Loux

    The C.O.R.N.

    Issue: 2015-31
  2. Palmer Amaranth seed head
    Author(s): Mark Loux

    The frequency of Palmer amaranth infestations in Ohio has been holding relatively steady again into this year.  We have mostly an isolated field or patch in about 10 counties, with the exception of two small epicenters of Palmer amaranth - far southern Scioto County and an area along the Madison-Fayette County line north of Jeffersonville.  Several new infestations of Palmer amaranth in soybeans have been reported over the past several weeks though.  It was also found in a first-year hayfield, where cutting and competition from the alfalfa/grass stand will likely keep it under control in co

    Issue: 2015-27
  3. Author(s): Mark Loux

    According to our weather guru, there is no close precedent for a summer like this in the last 100 years, and I can’t recall a year with this much mid-season rain in my almost 30 years here.  This has obviously caused immense problems with post-emergence herbicide applications.  There are many fields with large giant ragweed plants that still require treatment, should field conditions become suitable for traffic again.  Even the best herbicide treatments are not likely to completely control all of the large giant ragweed, but they can be at least partially effective.  Additional goals of her

    Issue: 2015-22
  4. Water Stressed Corn in Ohio
    Author(s): Mark Loux

    1.  Wet weather has delayed POST herbicide applications in both corn and soybeans.  This can result in weeds and crops that are larger and more advanced in growth stage than anticipated.  The larger crop is primarily a problem in corn, where a more advanced growth stage can start to limit herbicide options.  Be sure to check labels and the OH/IN/IL Weed Control Guide for information on maximum crop size and stage for herbicides (Table 8 on page 68 of 2015 edition).  Larger weeds may require higher rates or more complex POST herbicide mixtures.  Glyphosate and Liberty rates can be increased

    Issue: 2015-18
  5. Author(s): Mark Loux

    While a variety of rainfall and soil moisture conditions can be found around Ohio, a shortage of rain following application of residual herbicides seems to be common.  We are hearing about weeds emerging early in the season even where residual herbicides were applied, which is an indicator of inadequate herbicide “activation”, or lack of downward movement into the upper inch or two of soil where weed seeds germinate.

    Issue: 2015-14
  6. Flat-fan overlap
    Author(s): Erdal Ozkan

    Spraying season is just around the corner. Just take a moment to review some common sense ideas I will mention here to get the most out of those expensive pesticides you will be spraying. The following “Top Ten” list will help you improve the performance of your sprayer and keep it from failing you: 

    Issue: 2015-11
  7. Marestail
    Author(s): Mark Loux

    This spring is shaping up to be one where marestail control problems abound, based on the following:

    a) not many fields were treated with herbicide last fall due to wet weather and the late harvest.  Fall treatment results in a field free of overwintered marestail in spring, which takes the pressure off spring burndown treatments – they just have to control the newly emerging small marestail.  One strategy to compensate for lack of fall treatment is to apply herbicide early in spring when overwintered marestail plants are still small, but….

    Issue: 2015-08
  8. Author(s): Mark Loux

    There are a bunch of residual herbicide premixes available now for use in soybeans.  Most of these are listed in the 2015 edition of the Weed Control Guide, but it seems like there’s always one or two that we don’t know about.  Many new premixes are essentially generic versions of products that had already been available.  Example – Boundary, Ledger, and Tailwind are premixes of metribuzin and metolachlor from different companies that are essentially identical in formulation and label.  Once there are more than a couple of trade names for the same herbicide or herbicide premix, we usually l

    Issue: 2014-41
  9. Author(s): Erdal Ozkan

    It is very likely you have already completed the harvest season, and in the process of storing all the equipment in a proper place. One piece of equipment requires more attention than others when putting it in the storage place. It is your sprayer. If you want to avoid potential problems and save yourself from frustration and major headaches, you will be wise to give your sprayer a little bit of TLC (Tender Loving Care) these days. Yes this is still a busy time of the year for some of you, but don’t delay winterizing your sprayer any more than necessary.

    Issue: 2014-38
  10. Author(s): Mark Loux

    The USEPA last week issued approval for Enlist Duo, the glyphosate-2,4-D premix for use in the Enlist corn and soybean system, in six states, including Ohio.  The approval came with a number of conditions that set a new precedent really, and we will cover these in more detail later this fall.  Dow informed us that they would provide more information in the near future about intentions for the scope of the 2015 launch of Enlist.  They are still working on export clearances for some countries and as with most new things, availability will be limited initially anyway.  We obviously have proble

    Issue: 2014-36