Recently revised corn related fact sheets

Corn Production and Management by Topic
Disease Weeds
Insects Growth and Development
Fertility Planting
Harvest Silage


We recently updated the “Troubleshooting Abnormal Corn Ears” site to help corn growers and agricultural professionals diagnose and manage various ear and kernel anomalies and disorders





2020 Ohio Corn Performance Test

2020 Ohio Silage Performance Test

C.O.R.N. Newsletter Articles

  1. Author(s): Amanda Douridas

    C.O.R.N. Live is back as we anticipate the 2021 Farm Science Review. Nate Douridas, Farm Manager of the Molly Caren Ag Center, site of the Farm Science Review, will give an update on harvest as they begin to open fields for field demonstrations. He will give us an early look at yields and moisture and what to expect during the field demonstrations this year. Then join us for a walk through the Agronomic Crops Plots. These plots demonstrate research conducted on farms around the state and offer CCA credit opportunities during the show.

    Issue: 2021-30
  2. Author(s): Mark Loux

    Options to try to make weedy fields more harvestable include preharvest application of certain herbicides or waiting until after frost to harvest, or both.  Weedy fields should generally be harvested as late as possible to give maximum time for weeds to die and dry down and rot.

    Issue: 2021-30
  3. Author(s): Pierce Paul , Author(s): Mark Badertscher , Author(s): Marian Luis

    Contrary to what was observed over the last three growing seasons when tar spot was restricted to a few counties in the NW corner of the state, in 2021, the disease has so far been reposted in 21 counties, including as far South as Clark County and as far east as Holmes County. In the past, the disease was seen late in the season (after R4), but this year it was reported in some fields at or before silking (R1).

    Issue: 2021-30
  4. Fall Army Worm in Late Corn
    Author(s): Andy Michel , Author(s): Kelley Tilmon , Author(s): Curtis Young, CCA

    We have all experienced the massive damage that fall armyworms did on our forage crops and turf.  Keep in mind that fall armyworm can also damage corn.  We have found late-stage caterpillars feeding on corn that was planted on May 25 and on June 23rd.  The good news is that corn with above-ground Bt offers protection against fall armyworm.  The bad news is that Bt resistance has occurred in other states to our south (which is where our fall armyworms likely came from).

    Issue: 2021-30
  5. Corn ear in field.
    Author(s): Chris Zoller

    In the July 2021 report Trends in Production Practices and Costs of the U.S. Corn Sector, United States Department of Agriculture Economic Research Service (USDA-ERS) researchers examined acreage, production, technology changes, input costs, farm structure, and productivity changes.  The study used information from USDA Economic Research Service and USDA National Agricultural Statistics Service Agricultural Resource Management Survey for the years 1996, 2001, 2005, 2010, and 2016.  Data from the U.S.

    Issue: 2021-26


  1. Abnormal Ear Diagnosis Poster,  ACE-1. Farmers frequently encounter abnormal corn ears in their fields when the crop has experienced a major stress, such as drought, temperature extremes, disease, insect injury, or misapplied chemicals. These abnormalities often affect yield and grain quality adversely. In this poster, ten abnormal corn ears with distinct symptoms and causes are highlighted. The purpose of the poster is to help corn growers and agricultural professionals diagnose various ear disorders.

  2. Corn Disease Management in Ohio, Bulletin 804. Five to 15 percent of Ohio's corn crop is lost to disease each year, amounting to nearly $100 million in lost farm income. Corn diseases include seedling diseases, leaf blights, stalk rots, ear and kernel rots, and viruses. This bulletin describes the disease symptoms, provides color images, gives the environmental factors favoring the disease, the method of transmission and infection, and management options for the major diseases affecting corn in Ohio.

  3. 06/2019

    Corn, Soybean, Wheat and Alfalfa Field Guide, Bulletin 827.Looking for a handy guide to take to the field to diagnosis various pest and production problems? This guide is the answer! You will want one of these guides in the truck and maybe a second in the tractor.

  4. 04/2017

    Ohio Agronomy Guide 15th Edition, Bulletin 472. The newly revised Ohio Agronomy Guide serves as the official compilation of adaptive results and recommendations from research and educational programs. Described in this manual is information on Ohio's climate and soil, soil and water management, soil fertility, and corn, small grain, and forage crop production and management. Also, seed evaluation and weed control for the previously listed crops are discussed.

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