COMPARISON OF THE DISTRIBUTION AND OCCURRENCE OF FUSARIUM-GRAMINEARUMAND DEOXYNIVALENOL IN HARD RED WINTER-WHEAT FOR 1993-1996

Hard red winter wheat samples collected from different locations in Ka nsas from the 1993, 1994, 1995, and 1996 harvests were plated to deter mine Fusarium graminearum infection and analyzed for deoxynivalenol by thin-layer and gas chromatography. Rainfall, temperature, and cultiva r were important factors affecting the severity of F. graminearum infe ction as well as deosynivalenol production. The 1993 and 1995 growing seasons and high percentages of samples infected with F. graminearum a nd contaminated with deoxynivalenol. Averaged over the four years, cul tivars 2163 and Karl had significantly higher levels of infection than did TAM 107. These widely grown cultivars were used in comparison. No rtheastern Kansas had the highest levels of F. graminearum infection a nd deoxynivalenol contamination but also had the lowest acreage plante d to hard red winter wheat.