Effects of A. flavus population in peanut fields on its invasion and aflatoxin production in peanut
1997
Arunsri Wongurai | Woothisak Butranu | Sudthi Suriya (Department of Agriculture, Bangkok (Thailand). Plant Pathology and Microbiology Div. Seed and Post-harvest Pathology Research Group)
In dry season showed that the population of A. flavus in soil between inoculation and non-inoculation plots was not different. Among 3 peanut cultivars A. flavus in soil was not different at every stage of growth. There was no difference of A. flavus invasion in peanut seeds neither obtained from inoculation and non-inoculation nor among 3 peanut cultivars Peanut pods with initial moister content 13-15 percent were storage for 2 month. There was no increasing of A. flavus population and aflatoxin content in them. In rainy season, it was similarly trend; there was no significant different of A. flavus colonies in soil neither between inoculation and non-inoculation plots nor among peanut cultivars (range 4990-6272 colonies/1 g soil). The seed moisture content was about 25.0 percent at starting period and it was 8.3 percent at 8 weeks of storing. The invasion of A. flavus varied form 1.9-6.2 percent, however there was no different between inoculation and non-inoculated plots. In addition, there was no difference among those peanut cultivars. The aflatoxin production was not detected at 0 week of storage. After 2 weeks the amount of toxin was detected and after that it increased in all samples (range 112-3541 micro g/g). However there was no difference of toxin production on peanut seeds obtained from inoculated and non-inoculated plots.
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