Cool, wet conditions during the 2009 growing season resulted in mold infestation of corn before it was mature. This experiment determined the total tract digestibility of energy and dry matter in 7 corn samples, selected for the presence of mold by with low mycotoxin content (< 1.0 ppm DON). Sixteen finishing barrows weighing an average of 99 kg were housed individually and fed experimental diets contained 96.9% of the corn sample. Pigs were fed twice a day for 3 feeding periods of 14 days each. Corn test weight, kernel damage and mold count all varied among sources (P < 0.001) and there were also differences in DM and GE digestibility for the most compromised corn sources. We concluded that mold infestation may negatively affect the feeding value of corn. Therefore, the practice of blending moldy corn with clean corn may adversely affect its feeding value for pigs.
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