Wednesday, July 3, 2013

Question: What could cause an uneven stand of corn?

There can be multiple issues that can cause uneven corn stands:

Some possibilities for you to rule out:
1.) Herbicide injury

2.) Disease

3.) Uneven stands because of replanting

4.) Issues with soil to seed contact due to severe surface crusting/compaction

5.) Issues due to low soil temperatures (less than 50 degrees)

6.) Uneven soil moisture

7.) Corn nematodes - The U of I Plant Clinic can evaluate soil samples for corn nematodes. If you suspect or would like to rule out corn nematodes as a problem, you are more than welcome to submit a composite soil sample to the U of I Plant Clinic for evaluation. For additional information on symptoms or sampling, you can refer to the following links:

Most problems this year were attributed to poor soil conditions at planting; however, we need to rule out all of the possibilities listed above. Further information on uneven corn stands can be found at the following links:

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