Start Date

1-12-2010 12:00 AM

Description

Corn in 2009 was extremely wet and had low test weights (often 52 lb/bu and less) that did not increase significantly after drying. The situation was caused by a wet, cold growing season that was 20-25% short on heat units, followed by a cloudy, humid fall, with just enough heat to put field molds in their optimal growing conditions. This was the source of higher-than-normal damaged (moldy) kernel levels out of the field, with progressively higher risk of vomitoxin, zearalenone, and fumonisin from west to east in the Corn Belt. Mycotoxins do not go away in storage; they will show up in 2009 corn carryover. Storage molds do not normally produce toxins to the extent that field molds do, but experience is limited in extreme high-damage cases. On the plus side, tests showed that higher moisture and lower test weight by themselves did not inherently reduce ethanol yield on a dry weight basis.

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Dec 1st, 12:00 AM

Crop quality from 2009/2010 and grain storage management needs

Corn in 2009 was extremely wet and had low test weights (often 52 lb/bu and less) that did not increase significantly after drying. The situation was caused by a wet, cold growing season that was 20-25% short on heat units, followed by a cloudy, humid fall, with just enough heat to put field molds in their optimal growing conditions. This was the source of higher-than-normal damaged (moldy) kernel levels out of the field, with progressively higher risk of vomitoxin, zearalenone, and fumonisin from west to east in the Corn Belt. Mycotoxins do not go away in storage; they will show up in 2009 corn carryover. Storage molds do not normally produce toxins to the extent that field molds do, but experience is limited in extreme high-damage cases. On the plus side, tests showed that higher moisture and lower test weight by themselves did not inherently reduce ethanol yield on a dry weight basis.