C.O.R.N. Newsletter

  1. armyworm
    Author(s): Kelley Tilmon , Author(s): Andy Michel

    In April we reported that University of Kentucky true armyworm moth counts were higher than average.  These moths migrate northward, so if our southern neighbor reported high catches, many moths also likely made it into Ohio. After migrating and establishing, armyworms begin to lay eggs in grasses, including wheat fields and cover crop fields (that may have corn planted soon). Larvae feed for about 3 weeks before pupating. This article discusses armyworm management in corn and small grains.

    Issue: 2017-13
  2. Author(s): Peter Thomison , Author(s): Steve Culman

    There was little progress made on corn planting last week due to persistent rains and saturated field conditions (https://www.nass.usda.gov/Statistics_by_State/Ohio/Publications/Crop_Progress_&_Condition/index.php).  As of Sunday May 7, 46 percent of Ohio’s corn crop was planted - only 4% more than the previous week. Moreover, according to NASS estimates, only 12% of the crop has emerged.

    Issue: 2017-12
  3. field day
    Author(s): Amanda Douridas

    Join specialists in the field this summer to see hands on what insect and disease pressure is present. The specialists will help participants identify insects and diseases and then discuss management strategies. The series begins with a Pasture Walk on May 23 at 5:30 pm. The field borders the Ohio Caverns so an optional group tour of the Caverns has been set up at 4pm ($15).

    Issue: 2017-12
  4. emerged corn
    Author(s): Peter Thomison

    Warm, dry weather promoted significant corn planting last week, especially in western Ohio. According to USDA/NASS estimates (https://www.nass.usda.gov/Statistics_by_State/Ohio/Publications/Crop_Progress_&_Condition/2017/cw1817oh.pdf) as of April 30, 42 percent of the corn crop in Ohio has been planted. However, much cooler temperatures forecast this week may slow germination and emergence of these late April plantings.

    Issue: 2017-11
  5. Author(s): Peter Thomison

    Heavy rains over the weekend resulted in saturated soil conditions across much of the state. Excessive rainfall in some areas resulted in localized ponding and flooding of corn.

    Issue: 2017-11
  6. Author(s): Peter Thomison

    Planting depth recommendations for Ohio are 1.5 to 2 inches deep to ensure adequate moisture uptake and seed-soil contact. Deeper planting may be recommended as the season progresses and soils become warmer and drier, however planting shallower than 1.5 inches is generally not recommended at any planting date or in any soil type. When corn is planted 1.5 to 2 inches deep, the nodal roots will develop about 0.75 inches below the soil surface. However, at planting depths less than 1 inch, the nodal roots develop at or just below the soil surface.

    Issue: 2017-10
  7. Tables 1 & 2
    Author(s): Rich Minyo , Author(s): Allen Geyer , Author(s): Peter Thomison , Author(s): David Lohnes

    In 2016, 212 corn hybrids representing 26 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: 2016-39
  8. Author(s): Mark Badertscher

    Are you thinking about switching to no-till and have some questions you need answered before taking the leap?  Maybe you‘ve been planting no-till soybeans for years and are thinking about adapting this practice to corn.  Adopting no-till requires understanding how it affects drainage, soil structure, organic matter, weed control, and the application of pesticides and chemical fertilizers, all of which influence both yields and environmental impacts.

    Issue: 2016-26
  9. The primary causes of grain spoilage during storage are excess moisture and high temperature. However, insects can infest any grain that is not handled properly or that is stored longer than 6 months. Damage from weevils or other stored grain insects can be costly. Unfortunately, they often are discovered when grain is being taken out of the bin. At that point, the damage has been done and there are few control options.

    Issue: 2016-26
  10. Author(s): Peter Thomison

    Drought and heat adversely affected ear and kernel formation in many Ohio corn fields this year. Poor ear and kernel development is associated with variability in plant growth within fields that is related to differences in soil moisture.   In some areas within fields subject to protracted dry conditions, ears are absent (“barren”) or severely reduced in size with a few scattered kernels (nubbin ears). Where the impact of drought was less pronounced and plant height and color look normal or near normal, ear cob size may be normal but kernel number is markedly reduced.

    Issue: 2016-26