Considering Replant? Think Long and Hard.

June 18, 2010 08:35 AM
The window for replant decisions is rapidly closing. If it is still on the table for your corn fields, here are some important factors to consider.
Bob Nielsen, Purdue University Extension corn specialist, says says farmers need to look at these factors when considering a replant:
  1. Calendar date. The date is getting awfully late, he says. Historical yield potential drops off so substantially that you have to have a really low stand of corn at this point to even think about replanting.
  2. Stand assessment. Would you be planting the entire field or just part of the field?  Nielsen suggests taking a careful assessment of the surviving population of a field and weighing that against the potential for lower yields of something planted this late. “This is not a straightforward estimate to make because there are so many factors,” he says. “But, this kind of assessment is important.”
  3. Herbicides. Have you already put down corn herbicides on this field? If you have, he says, you are probably restricted from planting soybeans in that field. So, you can either try your hand at replanting or hope for the best.
If you do decide to replant some corn, Nielsen suggests trying to find a hybrid with strong disease resistance. “Late planted corn can have the potential for more disease problems, as a disease can attack a corn plant when it is younger, letting the disease have more time to develop.”
Head to the Field
Given this onset of warm muggy weather, which is favorable for diseases, Nielsen says farmers should be scouting their fields. “It is not too early to start walking fields.”
After the recent storms in many parts of the Midwest, fields are likely to have wind or hail damage.
“Not that’s there’s anything you can do about it,” he says. “But it may help farmers do at least some kind of ballpark yield estimates that can help them in their marketing decisions as we approach harvest.”
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