DEOXYNIVALENOL AND ACETYLDEOXYNIVALENOL ACCUMULATION IN-FIELD MAIZE INOCULATED WITH FUSARIUM-GRAMINEARUM

Seven selected maize hybrids (Smolimag, Ruten, KLG 2210, Zenit, Betuli sa, RAH BE 86101 and RAH BE 90102) were toothpick inoculated in the ea r(at approximate to 10 days after midsilk) with a single isolate of Fu sarium graminearum in order to determine their reaction to infection a nd susceptibility to mycotoxin accumulation in the tissues. Deoxynival enol (DON), 15-acetyldeoxynivalenol (15-AcDON), and 3-acetyldeoxynival enol (3-AcDON) were detected in differing amounts in kernels, husks, s talks (nodes and internodes) and roots. DON was recovered from stems, husks and damaged kernels at levels of 864, 278 and 93 mg/kg, respecti vely, while 15-AcDON was recovered at 235, 55 and 11 mg/kg and 3-AcDON was recovered at 3, 2 and 0.5 mg/kg, respectively. Maize hybrids Smol imag and Ruten were most resistant to infection and contained the lowe st amounts of mycotoxins in the tissues while Zenit, RAH BE 90102, RAH BE 86101 and Betulisa were most susceptible to infection and accumula ted higher amounts of mycotoxins.