THE EFFECT OF HEAD BLIGHT ON REDUCTION OF YIELD TRAITS AND MONILIFORMIN ACCUMULATION IN KERNELS OF 17 WINTER WHEAT CULTIVARS INOCULATED WITH FUSARIUM AVENACEUM

摘要

The susceptibility to head hlight of 17 winter wheat cultivars widely grown in Poland were tested in the field experiments (crops of 1994 and 1995), The effect of inoculation with F. avenaceum KF 203 (ATCC 64 451) isolate on the yield and on accumulation of moniliformin was examined- The average percentage of the kernels with visible symptoms of scab (crop 1995) was 39,2% while the average weight of kernels per head and weight of 1000 kernels were reduced to 92,5 and 80,5% of the control (non-inoculated), respectively. Moniliformin concentration in unselected sample of kernels amounted to 2.1 mg/kg. Basing on the number of diseased kernels, the extent of their contamination with the toxin and yield reduction it could be concluded that 3 cultivars, Liwilla, Caribo and Maltanka, are the least susceptible to Fusarium head blight, while Gama, Kobra and Almari are highly susceptible.