Virulence of Sclerotinia sclerotiorum in common bean using inoculation on leaf axils method

Eder Marques, Irene Martins, Sueli Corrêa Marques de Mello

Abstract


Considered one of the most important diseases in common bean (Phaseolus vulgaris L.), white mold caused by Sclerotinia sclerotiorum (LIB. DE BARY), Ss, is the topic of studies in various parts of the world. The present work aimed to use the method of inoculation on leaf axils, to evaluate the virulence of three Ss isolates in common bean plantlets, in a greenhouse. The severity of the disease was evaluated with the help of a scale of grades from 1 to 9, based on the length of the lesions observed seven days after inoculation of the fungus. Joint analysis of the data revealed that isolates CEN1147 and CEN969 were the most virulent. The results obtained in this work allowed us to select isolates with good levels of pathogenicity for use in experiments that aim to control white mold on the common bean crop. However, due to high variation on the length of the lesions observed the method of leaf axils and scale of grades resorted were not considered appropriate in assessing the virulence of the pathogen isolates in question.

Keywords


White mold, Phaseolus vulgaris L., variety BRS Estilo

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DOI: https://doi.org/10.5935/PAeT.V8.N1.09