PRODUCTION OF TRICHOTHECENE MYCOTOXINS BY FUSARIUM-GRAMINEARUM AND FUSARIUM-CULMORUM ON BARLEY AND WHEAT

Wheat cultivars (Stoa, MN87150, SuMai-3, YMI-6, Wheaten) and barley cu ltivars (Robust, Excel, Chevron, M69) were inoculated in the field wit h isolates of Fusarium graminearum and F. culmorum. The diseased (Fusa rium head blight) kernels were analyzed for deoxynivalenol (DON), 15-a cetyldeoxynivalenol (15-ADON) and nivalenol (NIV). F. culmorum produce d all three trichothecenes on all cultivars tested whereas F. graminea rum only produced DON and 15-ADON. There was no well defined correlati on between DON production in the host and resistance although the data tended to favor SuMai-3 as having definitive resistance to both F. gr aminearum and F. culmorum.