The estimation op physiological variability of some isolates of Fusarium nivale /Fr./ Ces.

The extend of physiological variability of five Isolates of Fusarium nivale /Fr./ Ces. using a tandem - crossed Immunoelectrophoresis was studied. In the homological reaction of antiserum antl-F. nivale fourteen precipiration lines were obtained. The variability of antigens originated from different isolates was found. The studied isolates showed differentiation In pathogenicity to three rye genotypes.