The Ohio State University College of Food, Agricultural, and Environmental Sciences
C.O.R.N. Newsletter
OSU Extension
Ohio State ATI
August 9-15, 2016
Editor: Eric Richer, CCA

Early Autumn Weather Outlook


All data suggests above normal temperatures will persist into autumn. However, it should be noted that the above normal temperatures will be driven more from the night time lows than daytime maximum temperatures. This means we do not expect many days above about 90 for the maximum temperatures.

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Bt Resistance in Western Corn Rootworm—The 3rd Shoe Has Dropped

Authors: Andy Michel, Kelley Tilmon

Western corn rootworm is a highly adaptable insect, and it was just a matter of time before we saw resistance to Bt traits designed to protect against root damage.  In the Western Corn Belt, growers have noticed many field failures due to heavy rootworm feeding.

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Reports of Frogeye Leaf spot in southern Ohio:. To spray or not to spray.

Author: 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

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Warm Nights May Impact Corn Yield

Author: Peter Thomison

Weathercasters are calling for continued above average temperatures in August, especially higher night time temperatures. Past studies show that night time temperatures affect yield potential.

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Spider Mites in Corn

Authors: Kelley Tilmon, Andy Michel

Normally we only worry about spider mites in soybean, but when conditions are just wrong they can impact corn as well.  Corn that has been treated with some fungicides and insecticides (particularly a broad-spectrum pyrethroid) are more likely to

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Contract Termination - The Big Data Confusion: Part 12

Authors: John Fulton,

Termination signifies ending an obligation under a contract. Sometimes, terminating a contract can be a difficult process.

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Protect Water--Keep Nutrients in the Field

Author: Mark Badertscher


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FSR Agronomy College is September 13

Author: Harold Watters, CPAg/CCA

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.

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About C.O.R.N. Newsletter

C.O.R.N. Newsletter is a summary of crop observations, related information, and appropriate recommendations for Ohio crop producers and industry. C.O.R.N. Newsletter is produced by the Ohio State University Extension Agronomy Team, state specialists at The Ohio State University and the Ohio Agricultural Research and Development Center (OARDC). C.O.R.N. Newsletter questions are directed to Extension and OARDC state specialists and associates at Ohio State.

Glen Arnold, CCA
Field Specialist, Manure Nutrient Management
Mark Badertscher
Educator, Agriculture and Natural Resources
Lee Beers, CCA
Educator, Agriculture and Natural Resources
Amanda Bennett
Educator, Agriculture and Natural Resources
Steve Culman
State Specialist, Soil Fertility
Sam Custer
Educator, Agriculture and Natural Resources
Amanda Douridas, CCA
Educator, Agriculture and Natural Resources
Greg LaBarge, CPAg/CCA
Field Specialist, Agronomic Systems
Ed Lentz, CCA
Educator, Agriculture and Natural Resources
Sarah Noggle
Educator, Agriculture and Natural Resources
Tony Nye
Educator, Agriculture and Natural Resources
Les Ober, CCA
Educator, Agriculture and Natural Resources
Pierce Paul
State Specialist, Corn and Wheat Diseases
Eric Richer, CCA
Field Specialist, Farm Management
Peter Thomison
State Specialist, Corn Production
Kelley Tilmon
State Specialist, Field Crop Entomology

The information presented here, along with any trade names used, is supplied with the understanding that no discrimination is intended and no endorsement is made by Ohio State University Extension is implied. Although every attempt is made to produce information that is complete, timely, and accurate, the pesticide user bears responsibility of consulting the pesticide label and adhering to those directions.

CFAES provides research and related educational programs to clientele on a nondiscriminatory basis. For more information, visit For an accessible format of this publication, visit

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