C.O.R.N. Newsletter

  1. 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
  2. Soybean Fields in Northwest Ohio June 22, 2015
    Author(s): Laura Lindsey

    Due to wet weather, a few farmers in northwest Ohio have not yet planted soybean.  Can this soybean seed be saved and planted next year? 

    1.)  Check with your seed dealer.  Your seed dealer may have options available to return seed.  Check with your seed dealer to see what your options are.

    Issue: 2015-18
  3. Soybean Root Rot
    Author(s): Laura Lindsey , Author(s): Anne Dorrance

    The forecast for the coming week is for continued rain and in many cases this will fall on already saturated soils across the northern and west central part of the state.  This is going to be tough on soybeans.  Here is a guide to help differentiate among some key problems when these types of weather events occur.

    Issue: 2015-17
  4. Author(s): Laura Lindsey

    The majority of the soybean acres in Ohio have been planted.  (According to the USDA National Agricultural Statistics Service, 85% of the soybean acres were planted by May 31.)  However, even if 5% of the soybean acres are not yet planted, with 5.1 million acres of soybean in Ohio, there are still 255,000 acres left to plant.  There are three things to consider when planting soybean in June: 1.) row width, 2.) seeding rate, and 3.) relative maturity.

    Issue: 2015-16
  5. Author(s): Anne Dorrance , Author(s): Andy Michel

    Editor's note: Meredith Eyre, Graduate Research Assistant, was an author on this article.

    Issue: 2015-15
  6. 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
  7. Author(s): Andy Michel

    For a couple of weeks we have been warning about the possibility of black cutworms based on adult catches reported by surrounding states.  We have begun to observe some minor feeding on corn, suggesting that the larvae are there and the worst of the damage is yet to come.  We have also received some reports of slug feeding—this is no surprise given the amount of early season rain as well as the more recent precipitation over the weekend.  As our crops are starting to emerge, these are prime sources of food for hungry cutworms and slugs.

    Issue: 2015-13
  8. The watermolds, Pythium or Phytophthora, affecting soybeans
    Author(s): Anne Dorrance

    Some soybeans have been planted and issues have already been reported.  The most common symptom is spotty areas around the field with large skips or limited emergence.  Take a garden trowel and dig up a few places and try to find the seed that was placed there.  Here is a review of the seedling disease issues that are common most years in Ohio.

    Issue: 2015-13
  9. Uneven Soybean Emergence
    Author(s): Laura Lindsey

    Soybean planting is well underway throughout Ohio.  The USDA National Agricultural Statistics Service reported 23% of the soybean acres were planted by May 10 (and many more acres were planted between May 10 and 18) up from 13% at the same time last year.

    Issue: 2015-13
  10. Soyean planting rate chart
    Author(s): Laura Lindsey

    Planting date.  Planting date (both too early and too late) can reduce soybean yield potential.  In 2013 and 2014, we conducted a planting date trial at the Western Agricultural Research Station near South Charleston, Ohio.  In both years, soybean yield decreased by 0.6 bu/ac per day when planting after mid-May.  The greatest benefit of planting May 1 to mid-May is canopy closure which increases light interception, improves weed control by shading out weeds, and helps retain soil moisture. 

    Issue: 2015-09