Friday, June 20, 2014

Is There Hope for Hail Injured Corn (> V6 Growth Stage)?


Following V6, the growing point is above ground and very susceptible to damage.  Corn above this stage should be sliced open:

1.)  If the growing point or region surrounding that growing point appears damaged, the producer may want to discount that plant as a viable, yield producing plant.  Even if it does survive, tillering or stunting may result.

2.)  If the growing point has been bruised, factor that in it as a potentially lost plant and reference the chart on page 18 of your 2014 Growing Guide or Should I Replant my Corn? (remember – we never hit potential yield, so this number represents the maximum possible loss in that field). 

3.) DO NOT BASE YOUR IMPACT ESTIMATE ON HOW BAD THE FIELD LOOKS – SLICE OPEN PLANTS.  THE APPEARANCE OF THE FIELD AT THIS POINT IS NOT DIRECTLY RELATED TO HARVEST-TIME YIELD!

Below are some pictures from hail injured corn in 2005: 

Leaves were shredded from the plant and some plants were shredded at nearly ground level.  The corn crop was around V8.
This picture shows how the leaves initially showed some funky symptoms, but became progressively better as new leaves emerged from the whorl.


This picture shows how the entire plant in some of the roughest areas of the field looked two weeks after the hail.

The end result was some odd looking leaves for a while.  Eventually, you could not tell that the field had suffered this type of severe injury, and we did not see an impact with the combine.


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