Abstract
Growth rates of Aspergillus flavus L. ex Fr. and its aflatoxin production were studied at 25° and 92% e.r.h. in wheat sterilized respectively by ethylene oxide fumigation, by autoclaving and by irradiation. The fastest growth rates and in general the highest yields of aflatoxin B 1 were obtained in wheat irradiated at 1.0, 2.5 and 4.0 Mrad but some very high aflatoxin levels were also recorded for one or two samples sterilized by other methods. No simple relationship was demonstrated between growth rates and aflatoxin levels but a big decrease in growth rate was accompanied in irradiated grain by a parallel decrease in the amount of aflatoxin B 1 accumulated. Both growth rates and aflatoxin levels were variable and no differences could be established between them for samples sterilized by fumigation or autoclaving.
Published Version
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