C.O.R.N. Newsletter

  1. Author(s): Anne Dorrance

    Late reports of frogeye developing on susceptible cultivars in southern Ohio.  So the next question is what to do.  During 2005-2008, we were able to measure a mean difference in yield of 5 to 10 bu/A when soybeans were treated at R3 in fields where frogeye was present.  We have also been able to measure a greater yield difference on highly susceptible varieties when frogeye was present during the early flowering stages.  However, last year, when frogeye was less than 1 spot per 40’ on a moderately susceptible variety, and the conditions were very dry and warm over the next 2 weeks, we coul

    Issue: 2016-24
  2. Agronomists , CCAs and custom applicators are invited to the Farm Science Review Agronomy College, hosted by the Ohio AgriBusiness Association in partnership with Ohio State University Extension and the Farm Science Review staff. The program will bring industry experts, OSU researchers, and agronomy service providers together to enhance collective knowledge and learning at the Molly Caren Agricultural Center in London, Ohio, on Sept. 13 - one week before the start of the annual three-day farm show.

    Issue: 2016-24
  3. Author(s): Andy Michel , Author(s): Reed Johnson

    Although soybean aphids remain at low levels in Ohio, we are aware that many growers are adding insecticides to spray tanks when applying fungicides for plant health purposes and even late applications of herbicides because: “Well, I’m going over the field anyway so I thought I’d add an insecticide for insurance purposes! The insecticide is relatively cheap and soybeans are worth so much!” As we have always stated, we do NOT recommend this practice, and feel an IPM approach is much better for everyone and everything, including the environment.

    Issue: 2016-23
  4. Author(s): Kelley Tilmon , Author(s): Andy Michel

    With continued dry weather, the pest we’ve been getting the most calls about is the spider mite.  This is just a reminder that vigilant scouting for this pest is a good idea right now.  It is also important to re-scout 5 days after treatment because many products will not kill the eggs, and populations can resurge.  Any nescessary followup treatment should be made with a product with a different mode of action to reduce resistance development (so, for example, if you used something with bifenthrin the first time, you might switch to Lorsban the second time, or vice versa).  This link will t

    Issue: 2016-23
  5. frost damaged soybeans
    Author(s): Laura Lindsey , Author(s): Peter Thomison

    Soybean: Last Monday, May 16, air temperatures dropped to high 20s/low 30s causing some freeze injury to soybeans. Soybeans in low areas of the field are most likely to be affected. Plants should be assessed for damage at least five days after suspected injury to inspect for regrowth. If damage occurred above the cotyledons, the plant will likely recover. If damaged occurred below the cotyledons, the plant will not recover. Look for a discolored hypocotyl (the “crook” of the soybean that first emerges from the ground) which indicates that damage occurred below the cotyledons.

    Issue: 2016-13
  6. Author(s): Laura Lindsey

    Wet weather has kept many farmers (and us) out of the field.  According to the USDA National Agricultural Statistics Service, as of May 15, 10% of the soybean acres were planted.  At the same time last year, 46% of soybean planting was complete.  On average, in Ohio, the majority of soybean acres are planted mid to late May (Table 1).  Although, it is not uncommon for soybean planting to creep into June.  In general, we don’t recommend altering soybean management until planting in June.  Below are some guidelines to consider if planting soybeans in June.

    Issue: 2016-13
  7. cereal leaf beetle feeding in wheat
    Author(s): Andy Michel , Author(s): Kelley Tilmon

    With much of the state still yet to plant, growers should be keep a few insect pests in mind as they get in into fields this week:

    Issue: 2016-12
  8. Bee on dandilion
    Author(s): Reed Johnson , Author(s): Doug Sponsler , Author(s): Andy Michel , Author(s): Kelley Tilmon

    Beekeepers in Ohio benefitted from the generally mild winter of 2015-2016.  In Columbus we lost less than 20% of our colonies over winter.  Spring is the only reliably good season for bees in Ohio.  Colonies that survived the winter and new colonies brought up from the Gulf Coast or California are currently in the process of harvesting nectar and pollen from spring-blooming trees and weeds.  Little honey will be made from this spring bounty as most will be eaten by the bees themselves as they multiply and grow into large productive colonies that will be able to make a honey crop off of clov

    Issue: 2016-11
  9. Author(s): Laura Lindsey

    This is our last week to collect data for our soybean yield-limiting project. The online survey can be found here:  https://www.surveymonkey.com/r/ohiosoybean  All data will be treated as confidential.  If you provide your name and email, you will receive a state and regional summary of the results.

    Issue: 2016-09
  10. 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.  (Note: Soil temperatures were >50°F at each planting date.)  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: 2016-08

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