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C.O.R.N Newsletter 2008-30
     September 8, 2008 - September 16, 2008


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Harvesting Drought Stressed Corn
by Peter Thomison

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Drought stress, combined with uneven emergence and development problems, has resulted in smaller than normal ears, and a greater percentage of "nubbin" ears in many Ohio corn fields. In some fields, plants are shorter than normal with reduced ear heights. Stress conditions may have also predisposed the corn crop to more stalk rot and greater potential for stalk lodging. Corn root worm injury in localized areas has resulted in root lodging. As a result of these conditions, some combine and harvesting adjustments may be necessary.

The following are management suggestions from ag engineers and equipment specialists on harvesting drought damaged crops.

1. Review the operator's manual for suggestions on harvesting a "light crop".

2. With short or lodged corn, run the gathering snouts and chains low. Watch for stones, logs and other debris, and be sure stone protective devises are working.

3. Drive carefully and at normal speeds to avoid excessive harvest loss and machine damage from stones.

4. For small ears, set stalk rolls and snapping plates closer than normal to snap off a higher percentage of ears. Do not attempt to snap off barren cobs.

5. If clean shelling is a problem, increase cylinder speed slightly, and if necessary, decrease concave clearance. With a rotary machine, check rotary concave clearance. Avoid excessive damage to kernels from good ears.

6. If cleaning losses are high, open the chaffer and chaffer extension slightly.

7. Initially decrease the amount of air from the cleaning fan. If cleaning becomes a problem, increase the fan blast, and close the lower sieve slightly.

8. Be alert to changes in weather and crop conditions, and make adjustments as necessary

Readers can subscribe electronically to this newsletter by signing up at http://agcrops.osu.edu/services/email.html. E-mail labarge.1@osu.edu if you have problems subscribing or no longer wish to receive this newsletter.

C.O.R.N. is a summary of crop observations, related information, and appropriate recommendations for Ohio Crop Producers and Industry. C.O.R.N. is produced by the Ohio State University Extension Agronomy Team, State Specialists at The Ohio State University and Ohio Agricultural Research and Development Center. C.O.R.N. Questions are directed to State Specialists, Extension Associates, and Agents associated with Ohio State University Extension and the Ohio Agricultural Research and Development Center at The Ohio State University.


Information presented above and where trade names are used, they are supplied with the understanding that no discrimination is intended and no endorsement 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.

All educational programs conducted by Ohio State University Extension are available to clientele on a nondiscriminatory basis without regard to race, color, creed, religion, sexual orientation, national origin, gender, age, disability or Vietnam-era veteran status.

Issued in furtherance of Cooperative Extension work, Acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture, Keith L. Smith, Director, Ohio State University Extension.

TDD # 1 (800) 589-8292 (Ohio only) or (614) 292-1868

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