AFLATOXIN VARIATION AMONG CORN SAMPLES WITH VARYING RATIOS OF ASPERGILLUS-FLAVUS-INOCULATED-NONINOCULATED KERNELS

  • 1 January 1979
    • journal article
    • research article
    • Vol. 62  (5) , 1083-1086
Abstract
Aflatoxin levels and physical properties of corn kernels inoculated with A. flavus during development and noninoculated kernels were compared in samples with various proportions of the 2 kernel types. The relationship between mean toxin levels and associated SD of 5 samples demonstrated a linear association from the lowest toxin in noninoculated corn through a mixture of 60% inoculated/40% noninoculated. At the highest toxin level in the 100% inoculated material, a reduction in sample variation was observed. Examination of individual kernel weights showed that inoculated kernels were distinctly lighter than noninoculated seed. A uniform grinding procedure of the samples yielded heterogeneous particle sizes based on the starting corn. The large particle fraction (> 500 .mu.m) decreased from 100% noninoculated kernels through the mixtures to the 10 inoculated seed; particles below 150 .mu.m were most abundant in the ground samples from inoculated kernels. In addition, the density of particles within a size category varied; lower densities were observed in samples obtained from A. flavus-inoculated kernels.

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