Granular bioplastic biocontrol composition

摘要

Previous research demonstrated that aflatoxin contamination in corn is reduced by field application of wheat grains pre-inoculated with the non-aflatoxigenic Aspergillus flavus strain NRRL 30797. We evaluated the reliability and efficiency of replacing wheat grains with the novel bioplastic formulation Mater-Bi® to serve as a carrier matrix to formulate strain NRRL 30797. Mater-Bi® granules were inoculated with a conidial suspension of NRRL 30797 to achieve a final cell density of˜log 7 conidia/granule. Incubation of 20-g soil samples receiving a single Mater-Bi® granule for 60-days resulted in log 4.2 to 5.3 propagules of A. flavus/g soil for microbiologically active and sterilized soil, respectively. The bioplastic formulation was highly stable; Mater-Bi® is a suitable substitute for biocontrol applications of A. flavus NRRL 30797.