SUSCEPTIBILITY OF BARLEY CULTIVARS AND LINES TO FUSARIUM INFECTION AND MYCOTOXIN ACCUMULATION IN KERNELS

Heads of 12 barley genotypes (8 cultivars and 4 lines) were inoculated with conidial suspension of the following single isolates: F. culmoru m no. 3, F, graminearum no. 122 and F. sporotrichioides no. ATCC 62 36 0. The number of kernels per head, 1000 kernel weight and yield have b een calculated for each genotype. Seed samples collected at harvest we re analysed for several trichothecene mycotoxins and zearalenone. The mycotoxin concentrations (mg/kg) in barley kernels inoculated with F. graminearum were as follows: deoxynivalenol (DON) 0.1 to 5.4 (av. 2.3) , 3-acetyldeoxy-nivalenol (3-AcDON) 0.0-0.2 (av. 0.1), 15-acetyldeoxyn ivalenol (15-AcDON) 0.0-0.7 (av. 0.2), nivalenol (NIV) 0.0-0.8 (av. 0. 3), zearalenone (ZEA) 0.0-0.1 (av. 0.0); F. culmorum: DON 0.6 to 12.0 (av. 5.3), 3-AcDON 0.1 to 1.0 (av. 0.6), 15-AcDON nd, NIV 0.1-0.7 (av. 0.3), ZEA 0.1-0.5 (av. 0.2). F. sporotrichioides T-2 toxin 2.4-13.9 ( av. 6.0), HT-2-toxin 0.1-0.8 (av. 0.3) and neosolaniol 0.2-1.5 (av. 0. 7).