In this study, we evaluated the feasibility of bioplastic-based formulations for delivering a nonaflatoxigenic
strain of Aspergillus flavus and for monitoring Aspergilli with the final objective of
controlling aflatoxin contamination in corn. Field application of inoculated bioplastic granules showed
a rapid shift in the composition of soil A. flavus population, with a significant decrease in relative
abundance of indigenous aflatoxigenic isolates. Application of bioplastic granules at 30 kg ha1 was more
efficient in replacing aflatoxigenic isolates than a 15 kg ha1 dosage. In the test plots evaluated, aflatoxin
contamination levels at corn maturity were 4.4 and 28.9 ng g1 for the 2009 and 2010 field seasons,
respectively. However, the biocontrol formulation was effective in reducing aflatoxin contamination in
both years. More precisely, soil application of 15 and 30 kg ha1 of bioplastic granules reduced aflatoxin
contamination by 59 and 86% in 2009, and 80 and 92% in 2010, respectively.