C.O.R.N. Newsletter

  1. Black cutworm moths
    Author(s): Andy Michel

    Last week, both Purdue University and the University of Kentucky reported high black cutworm catches. In addition, UKY caught a large number of armyworms in one of their traps.  Both of these moth species migrate into our area, lay eggs, and the developing larvae can be significant pests of corn and wheat.

    Issue: 2015-09
  2. The six soil regions sampled
    Author(s): Pierce Paul , Author(s): Terry Niblack

    Editor's note: Abasola Simon is also an author on this article.

    A total 425 corn fields were surveyed for plant-parasitic nematodes during the 2013 and 2014 growing seasons. In each year, soil samples were collected from 15-16 fields in each of 28 counties, across 6 soil regions, and nematodes were identified and counted.

    Issue: 2015-09
  3. Author(s): Peter Thomison

    Mistakes made during crop establishment are usually irreversible, and can put a "ceiling" on a crop's yield potential before the plants have even emerged. The following are some proven practices that will help get a corn crop off to a good start.

    Issue: 2015-08
  4. Author(s): Andy Michel

    For the past few years, the Western corn belt has been dealing with populations of western corn rootworm that have developed resistance to two Bt genes: Cry3Bb1 and mCry3a. US-EPA has recently developed a framework for managing Bt resistance, and is requesting comments from stakeholders (see:http://www.epa.gov/oppfead1/cb/csb_page/updates/2015/extends-rootworm.html). The deadline for the comment period is April 15th.

    Issue: 2015-07
  5. Author(s): Peter Thomison

    As the commodity price for corn has dropped during the past two years, there has been greater interest among some growers in producing non-GMO corn for a premium. According to the USDA-ERS (http://www.ers.usda.gov/data-products/adoption-of-genetically-engineered-crops-in-the-us.aspx#.Ud1p1b95m5S) 86% of Ohio’s corn acreage in 2014 was planted to transgenic (GMO) corn.

    Issue: 2015-04
  6. Author(s): Peter Thomison , Author(s): Rich Minyo , Author(s): Allen Geyer , Author(s): David Lohnes

    In 2014, 209 corn hybrids representing 28 commercial brands were evaluated in the Ohio Corn Performance Test (OCPT). Four tests were established in the Southwestern/West Central/Central (SW/WC/C) region and three tests were established in the Northwestern (NW) and North Central/Northeastern (NC/NE) regions (for a total of ten test sites statewide).  Hybrid entries in the regional tests were planted in either an early or a full season maturity trial. These test sites provided a range of growing conditions and production environments.  

    Issue: 2014-40
  7. Author(s): Alexander Lindsey , Author(s): Peter Thomison , Author(s): Rich Minyo , Author(s): Allen Geyer

    Drought events are predicted to increase with rising global temperatures and altered rainfall patterns. It is important that agronomists investigate ways to maximize water use to help reduce grain yield losses from drought events. If Ohio corn yields had been reduced 10% in 2013 due to drought, then the economic loss for growers would have exceeded $250 million. Ohio producers have begun using drought-tolerant corn hybrids that were developed for use in the Western Corn Belt to manage for drought events, but limited research has been conducted on these hybrids in the Eastern Corn Belt.

    Issue: 2014-40
  8. Author(s): Curtis Young, CCA

    There are recommended targets for percent grain moisture and grain temperature for winter grain bin storage.  Those recommended targets are listed in the following tables (Tables 1. and 2.).

    Table 1. Recommended grain moisture content for safe storage.*


    Moisture Content % Wet Basis**

    Storage Period


    Issue: 2014-39
  9. Author(s): Pierce Paul

    It is already the third week of October and most of the corn is still standing in the field.  Some of the earlier-planted fields are being harvested, but at relatively high moisture levels.  This is causing some concern among producers as to the potential for ear rot and mycotoxin problems.  In fact, we have already received several samples of moldy ears from some fields, but so far the problem does not seem to be widespread, with only a few fields affected.  Moreover, not every ear rot is associated with vomitoxin or other mycotoxin contamination of the grain.

    Issue: 2014-36
  10. Author(s): Peter Thomison

    Black layer is the stage in corn development at which kernel growth ceases and maximum kernel dry weight is achieved (also referred to as “physiological maturity”).  A killing fall frost prior to physiological maturity can cause premature leaf death or whole plant death.  This occurred over the weekend when temperatures dropped below freezing in some late planted Ohio corn that had yet “black-layered”.  The impact of frost injury to immature corn was discussed in the September 23 C.O.R.N.

    Issue: 2014-35