C.O.R.N. Newsletter

  1. Author(s): Mark Loux

    The C.O.R.N.

    Issue: 2015-31
  2. Author(s): Anne Dorrance

    Each year things seem to be coming earlier, choices need to be made even before we have this current crop in the grain bin, much less have it sold.  Here are a couple of suggestions as you prepare for the 2016 crop.

    1.       Focus variety selection on the HISTORIC problems for any given field. 

    Issue: 2015-31
  3. Aerial imagery of 2015 corn and soybeans
    Author(s): John Fulton

    Andrew Klopfenstein, Kaylee Port and Scott Shearer also contributed to this article

    Issue: 2015-29
  4. Author(s): Anne Dorrance

    Across the state some soybeans have hit the later growth stages and we have a range of tall, beautiful soybeans loaded with pods to short, scraggly, can still see the rows with few pods soybeans and everything in between.  Variability rules for the summer of 2015.  Over the next couple of weeks watch your fields and take some notes – you can learn a lot at the end of the summer to help make better decisions for 2016.  To see photos of all the conditions and symptoms mentioned below, click 

    Issue: 2015-27
  5. 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
  6. Aphids on soybean leaf, UMN Extension photo
    Author(s): Andy Michel

    As predicted, we have begun to see soybean aphids move into soybean fields over the past few weeks.  Coincidentally, this is the 3rd year in a row that we have seen aphids move in relatively late in the growing season.  Hopefully, most of our soybean are starting to mature and reaching the R6 stage, but there are some that still have a way to go due to delayed spring maturity.

    Issue: 2015-26
  7. soybean pods, photo by Rory Lewandowski
    Author(s): Laura Lindsey

    To estimate yield, four soybean yield components need to be considered: plants per acre, pods per plant, seeds per pod, and seeds per pound (seed size).  A printable worksheet to estimate soybean yield can be found by clicking here.  It is difficult to accurately predict soybean yield because of plant variability and fall weather conditions can influence seed size.  Estimates become more accurate as the growing season progresses. 

    Issue: 2015-26
  8. Sclerotinia stem rot (white mold), photo by Anne Dorrance
    Author(s): Anne Dorrance

    All of the rain during May, June, & July continues to impact the soybean crop in some areas of the state during 2015 in Ohio.  Surveys of our plots and some scouting in the lower canopy have turned up some surprises and some we expected.

    Issue: 2015-24
  9. Green Stink Bug
    Author(s): Andy Michel

    As our soybean begins to develop flowers and pods, we need to be aware of stink bugs that will begin feeding.  Although more common in the southern US, we have been noticing more stink bugs in soybean the past few years, even some fields where economic damage was seen. There are several species, including the green, the brown, the red-shouldered and the brown marmorated stink bug.  These insects have piercing/sucking mouthparts similar to aphids, and will pierce through the pod to feed on the developing seed.

    Issue: 2015-23
  10. 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