Abstract

A single load of corn naturally contaminated with aflatoxin (1,074 ppb), fumonisin (8.3 ppm), and ochratoxin A (206 ppb) was procured from central Oklahoma to evaluate the role of cleaning to remove mycotoxin contamination in corn. Corn was divided into twenty 333-lb lots, which were then cleaned using an EBM Gentle Roll corn cleaner to remove overs (material>1/2 inches) and unders (material<3/16 inches). The resultant 4 treatments included: 1) uncleaned corn; 2) overs from cleaned corn; 3) cleaned corn; and 4) unders from cleaned corn. Samples of each fraction were analyzed for mycotoxin content using multiclass liquid chromatography tandem mass spectrometry.

Cleaning generated approximately 6% screenings (unders + overs), and reduced (P<0.05) aflatoxin by an average of 26%. Cleaning also reduced (P<0.05) fumonisin by 45%, but did not impact ochratoxin A. Unders had nearly 4 times the aflatoxin and 7.5 times the fumonisin as the uncleaned corn. In conclusion, cleaning corn may substantially reduce mycotoxin contamination, but the resultant screenings should be used cautiously.

Keywords: corn, feed, mycotoxin, screenings

How to Cite:

Yoder, A., Tokach, M. D., DeRouchey, J. M., Paulk, C. B., Stark, C. R. & Jones, C. K., (2017) “Cleaning Reduces Mycotoxin Contamination in Corn”, Kansas Agricultural Experiment Station Research Reports 3(7). doi: https://doi.org/10.4148/2378-5977.7503