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Agronomic Crops Network

Agronomic Crops Network
https://agcrops.osu.edu

Ohio State University Extension

C.O.R.N. Newsletter

2018 Ohio Corn Performance Test Preliminary Results Now Available On-Line

Author(s): Rich Minyo , Author(s): Peter Thomison , Author(s): Allen Geyer

Results from the 2018 Ohio Corn Performance Test are now available on line at: http://oardc.osu.edu/corntrials

Issue: 2018-38
Harvest Delays Impact Corn Performance

Author(s): Peter Thomison , Author(s): Allen Geyer , Author(s): Rich Minyo

Leaving corn to dry in the field exposes a crop to unfavorable weather conditions, as well as wildlife damage. A crop with weak plant integrity is more vulnerable to yield losses from stalk lodging and ear drop when weathering conditions occur. Additional losses may occur when ear rots reduce grain quality and can lead to significant dockage when the grain is marketed. Some ear rots produce mycotoxins, which may cause major health problems if fed to livestock.

Issue: 2018-35
Premature Sprouting of Corn Kernels

Author(s): Pierce Paul , Author(s): Peter Thomison

We have received several reports of premature corn kernel sprouting across Ohio. The ear in the picture exhibiting premature sprouting was sampled from one of the Ohio Corn Performance Test plots at the NW Research Station and was associated Trichoderma ear rot. In this particular case, the fungus that causes the ear rot produces compounds that stimulates early germination. However, not all ear rots are commonly associated with premature sprouting. In fact, under the right set of conditions, this phenomenon may occur in perfectly healthy ears, without visual disease symptoms.

Issue: 2018-33
Stalk Quality Concerns

Author(s): Peter Thomison , Author(s): Pierce Paul

Poor stalk quality is being observed and reported in Ohio corn fields. One of the primary causes of this problem is stalk rot. Corn stalk rot, and consequently, lodging, are the results of several different but interrelated factors. The actual disease, stalk rot, is caused by one or more of several fungi capable of colonizing and disintegrating of the inner tissues of the stalk. The most common members of the stalk rot complex are Gibberella zeae, Colletotrichum graminicola, Stenocarpella maydis and members of the genus Fusarium.

Issue: 2018-33
What accounts for variability in grain protein levels in corn?

Author(s): Alexander Lindsey , Author(s): Stan Smith , Author(s): Peter Thomison

We’ve recently heard comments and questions concerning the varying levels of grain protein levels being found in shelled corn. Some feed companies have reported seeing many samples in the upper 6% and lower 7% protein range this year but there are reports of levels that are nearly 9%. Some feed mill operations are using 7% as the default value based on this year and last year’s levels. However, in the past, higher grain protein levels (% +2) have been cited for corn. Are the reports of low levels in 2016 and 2017 an anomaly?

Issue: 2018-01
2017 Ohio Corn Performance Test: Regional Overviews

Author(s): Rich Minyo , Author(s): Allen Geyer , Author(s): David Lohnes , Author(s): Peter Thomison

In 2017, 205 corn hybrids representing 25 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: 2017-40
2017 Ohio Corn Performance Test Preliminary Results Now Available On-Line

Author(s): Rich Minyo , Author(s): Allen Geyer , Author(s): Peter Thomison

Results from the 2017 Ohio Corn Performance Test are now available on line at: http://oardc.osu.edu/corntrials

Issue: 2017-39
Field drying and harvest losses in corn

Author(s): Peter Thomison

According to the USDA/NASS (https://www.nass.usda.gov/) as of Sunday, Oct. 15, 21 percent of Ohio’s corn was harvested for grain, compared to 34 percent for last year and 32 percent for the five-year average. Wet weather delayed corn harvest across the state and is not helping with field drying. Some growers are delaying harvest until grain moisture drops further. However, these delays increase the likelihood that stalk rots present in many fields will lead to stalk lodging problems.

Issue: 2017-35
Cool Weather and Corn Dry Down

Author(s): Peter Thomison

The recent cooler than normal temperatures may impact corn drydown. Once corn achieves physiological maturity (when kernels have obtained maximum dry weight and black layer has formed), it will normally dry approximately 3/4 to 1% per day during favorable drying weather (sunny and breezy) during the early warmer part of the harvest season from mid‑September through late September. By early to mid‑October, dry-down rates will usually drop to ½ to 3/4% per day.

Issue: 2017-30
2016 Ohio Corn Performance Test: Regional Overviews

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

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