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Northern Illinois Agriculture

University of Illinois Extension
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Do you want to build a snowman?

Posted by Russel Higgins - Weather

Another weather anomaly for northern Illinois farmers attempting to plant the 2014 crop. Snow fell for 4 hours on Friday at the NIARC. Farm foreman Dave Lindgren stepped outside to take a picture of the May 16th event. While the snow did not stick, the question persists on the impact of last weeks temperature drop on planted or emerged crops. We will keep a close eye on crops that have or are now emerging at the research center. One thing is certain, we haveĀ  yellowish corn and researchers that will benefit greatly from warmer weather and sunshine.

Interesting information from our neighbors to the west, Mark Licht and Clarke McGrath from Iowa State University summarized the effects of Imbibitional Chilling and Frost Damage to Corn and Soybean Seedlings in a timely Integrated Crop Management News report.

Highlights include
  • Imbibitional chilling is a concern for seeds that have not germinated.
  • A chilling effect occurs when seeds absorb water colder than 50 degrees.
  • The most critical time for imbibition is within 24 hours of planting.
  • Temperatures between 28 and 32 degrees F are damaging, but not necessarily lethal until temperatures fall below 28 degrees F.
  • Severity of frost damage is influenced by the length of time below 32 degrees F.
  • Wait 48 to 96 hours after the frost event to assess plant stand survival.

The Iowa State article can be accessed in its entirety here

http://www.extension.iastate.edu/CropNews/2014/05-16licht.htm



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