C.O.R.N. Newsletter

  1. Author(s): Mark Loux

    An article in last week’s C.O.R.N.

    Issue: 2017-14
  2. Author(s): Kelley Tilmon , Author(s): Andy Michel

    As planting wraps up, a reminder is in order about possible slug problems in no-till crops, especially in fields with a history of slug damage.  Although we do not know how numerous slugs are in fields, we do know that most crops are being planted later than normal.  If you have read our recommendations for slug management, you know that one way a grower can get a head start is to plant early, and get their crop out of the soil and growing before slugs begin their heaviest feeding.  However, with the weather conditions over the past month, many fields are just now being planted.  Slugs have

    Issue: 2017-14
  3. Corkscrewed mesocotyls in corn
    Author(s): Peter Thomison

    Last week I received several reports of abnormal corn emergence. Often the problems were associated with corn seedlings leafing out underground and it’s likely weather and seedbed conditions were responsible for the occurrence of the abnormal growth. Seedlings exhibiting abnormal emergence may have a twisted appearance because internal leaves start expanding before the seeding has elongated. “Corkscrewed” mesocotyl/coleoptile development may occur when the coleoptile encounters resistance (like soil crusting or a dense soil surface) as the mesocotyl elongates.

    Issue: 2017-13
  4. Author(s): Peter Thomison
    Issue: 2017-13
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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

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