Phenotypic and genotypic screening of common bean (Phaseolus vulgaris L.) landraces for resistance to collar rot fungus (Sclerotium rolfsii Sacc.) in North of Iran

Collar rot or southern blight is a serious soil-borne disease in common bean (Phaseolus vulgaris L.) at the North of Iran caused by the fungus Sclerotium rolfsii Sacc. which leads to intense yield reduction in a dwarf bean that is cultivated in Guilan Province. Thirty improved landraces of Guilan dwarf bean were exposed to the infectious disease with the most pathogenic isolate of S. rolfsii, to identify the resistant landraces. Disease Severity...