Author
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JURJEVIC, Z - UNIVERSITY OF GEORGIA |
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WILSON, D - UNIVERSITY OF GEORGIA |
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Wilson, Jeffrey - Jeff |
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CASPER, H - NORTH DAKOTA STATE UNIV |
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Submitted to: Aflatoxin Elimination Workshop Proceedings
Publication Type: Proceedings Publication Acceptance Date: 6/1/1999 Publication Date: N/A Citation: Jurjevic, Z., Wilson, D.M., Wilson, J.P., and Casper, H. 1999. Fungal successions and mycotoxins in stored pearl millet. Proceedings of the Aflatoxin Elimination Workshop. Atlanta, GA. October 20-22, 1999. Interpretive Summary: Technical Abstract: Pearl millet (Pennisetum glaucum) samples from 1996, 1997, and 1998 crop years were kept in experimental storage conditions to analyze fungal succession and mycotoxin development. The most frequently isolated fungi respectively were Fusarium semitectum (0-67%), Fusarium chlamydosporum (0-5 Alternaria spp (0-28%), Aspergillus flavus (0-56%), Curvularia spp. (0-37%),and Helminthosporium spp. (0-30%). Less frequently found were Aspergillus niger (0-6%), Aspergillus spp. (0-4%), Cladosporium herbarum (0-7%), Cerebella andropogonis (0-9%), Epicoccum spp. (0-6%). Fusarium verticillioides (0-13%), Gloeocercospora sorghi (0-1%), Penicillium spp. (0-7%), Phyllosticta spp. (0-10%), Phycomyces (0-2%), Rhizopus spp. (0-8%), yeast (0-28%), and other fungi (0-4%). Aflatoxins were found in all three years in different amounts depending on year and storage conditions. Amounts ranged from 5 ng/g to 1750 ng/g. Highest amounts of aflatoxins were detected in seeds from 1996 that contained approximately 20% moisture stored in 100% relative humidity at 25oC. Low levels of deoxynivalenol (0-0 g), nivalenol (0-0.4æg/g), and zearalenone (0-0.4æg/g) were detected from a standard panel of 35 different trichothecenes. No samples were positive for the presence of fumonisins. |
