Deoxynivalenol Content of Cereal Grain from Naturally Infected and Artificially Inoculated Plants in Field Trials in Norway

The Fusarium mycotoxins deoxynivalenol (DON) and 3-acetyl-deoxynivalenol (3-acDON) were determined in grain samples from naturally infected and Fusarium culmorum inoculated plants in field experiments in Norway during 1992–1996. The mean DON content in trials with inoculated plants was 11.8 μg/g in spring oats, 11.3μg/g in winter wheat, 28.9 μg/g in spring wheat and 31.4 μg/g in spring barley. In the natural infection trials the mean DON content was 0.32 μg/g in spring oats, 0.22μg/g in winter wheat, 1.48μg/g in spring wheat and 0.54 μg/g in spring barley. Only small differences in DON content were observed among cultivars, and significant differences were found only in winter wheat in the inoculation trials, and in spring wheat in the natural infection trials. A significant correlation was observed between the 3-acDON and DON contents in the inoculated trials in all grain species, the mean ratio of 3-acDON to DON ranging from 0.011 in wheat to 0.071 in oats.

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