Macroscopic and Microscopic Detection of Fungal Diseases of Green Bean (Phaseolus vulgaris) in the Gourma Province of Burkina Faso

The common bean (Phaseolus vulgaris L.) is a legume that faces numerous biotic constraints that hinder its production. Among these are fungal diseases that attack both leaves and pods, reducing yields. The objective of this study is to contribute to improving green bean production in the Gourma province. Macroscopic and microscopic identifications were carried out using plant pathology tools. As a result of the work, four pathogens were identified: Aspergillus niger, Botrytis cinerea, Colletotrichum lindemuthianum, and Alternaria alternata. These pathogens are responsible for various symptoms observed on the leaves and fruits, all contributing to a decrease in green bean productivity. This study allowed us to identify the different fungal pathogens of the common bean, which opens up possibilities for developing an appropriate control method.