Bio-efficacy of plant extracts against Pseudomonas syringae pv. syringae causing leaf spot of Cluster bean

Aqueous extracts of fresh leaves and fruits of some plants were evaluated in vitro for their antibacterial activity against Pseudomonas syringae pv. syringae that causes bacterial leaf spot in cluster bean using filter paper disc assay and seed treatment method. Leaf extracts of purple fleabane (Vernonia cinerea) and winter cherry (Withania somnifera), extracts of fresh fruits of emblic (Emblica officinalis), lime (Citrus aurantifolia), winter cherry (W. somnifera) and dried fruits of soap pod (Acacia rugata), emblic (E. officinalis), soap nut (Sapindus emarginatus) and belleric myrobalan (Terminalia bellirica) were found significantly effective to control the pathogen individually. All the plant extracts as seed treatment also controlled the pathogen and improved seed germination significantly over the check.