Scab response of selected winter wheat cultivars after inoculation with Fusarium avenaceum (Fr.) Sacc.

Inoculation experiments with 10 winter wheat cultivars were performed in tw o different regions of Poland, which have different climates, located at Ce rekwica (Central-west) and Sitaniec (South-east part of Poland), in the sea sons of 1995 and 1996, and Fusarium avenaceum isolate KF 203 (ATCC 64451) ( producing moniliforium) was used in inoculation of winter wheat heads. The percentage of scabby kernels was changeable during the experiment, although no interaction environment x cultivar was observed. Yield traits confirm t hat the climatic conditions in Sitaniec are favourable for higher scab inci dence, and indicate that cultivar Aleta was (at both locations) the most re sistant to the disease. Reduction of all yield traits for all the cultivars , at two locations, during two vegetative seasons, indicates that cvs Aleta , Almari and Begra were of the lowest susceptibility to scab, whereas Rosa and Parada were the most susceptible to the disease. Accumulation of monili formin in kernels on average in Sitaniec was 2.28 mu g/g during 1995 and 0. 41 mu g/g in 1996, and in Cerekwica it was 2.12 and 1.77 mu g/g in 1995 and 1996, respectively. The results of chemical analysis confirm low susceptib ility of cultivar Aleta to scab.