Investigating phenotypic variability and sensitivity in vitro to the fungicides of Pseudocercospora griseola strains

Abstract

Angular leaf spot (ALS) of common bean, caused by fungus Pseudocercospora griseola, is widespread and typical of tropical regions. ALS is responsible for significant crop damage and can result yield losses depending on cultivars susceptibility and environmental conditions. The use of fungicides is the main control meth od of disease and obtaining of resistant lines is difficult due to wide pathogen variability and presence of major and quantitative resistance genes (Pereira et al. 2015). There are insufficient information about traits of the pathogen involved in spread, penetration, infection and colonization in common bean. Furthermore, studies about P. griseola strains sensibility to fungicides have not been found in literature. Thus, this study has evaluated cytological and physiological variability and also sensibility to fungicides of a population of P. griseola strains from Brazil.