Reaction of morphological types of faba bean to infection with Ascochyta fabae Speg. and Botrytis fabae Sard.

Elżbieta Zakrzewska

Abstract

Reaction of 25 conventional and 63 determinate forms of faba bean to artificial inoculation with A. fabae and B. fabae was evaluated over five years. The severity of infection of faba bean with A. fabae was significantly higher than with B. fabae. This was observed for the both morphological types. Most of the conventional forms were less infected than the determinate forms, but it was more distinct for the A. fabae infection. Variable resistance reaction of cultivars was observed depending on pathogen and growth habit. In all years, conventional as well as determinate cultivars differed significantly in resistance to A. fabae. Significant variability of resistance to B. fabae was found only in one year for the conventional types and in another year for the determinate types of faba bean. It was found that some determinate cultivars showed higher resistance to A. fabae or B. fabae than most of the conventional forms, and some conventional forms were in the group of the most susceptible cultivars.