Abstract
Plants extracts possess biocidal activity which can effectively control numerous plant pathogens. In the present study, antimicrobial activity of formulation prepared from aqueous extract of tender core of Musa acuminata pseudostem and Tagetes erecta leaves against pathogens infecting cucumber, barley, spinach and tomato was studied. The extract induced biochemical defense in the host plants, which was sustained for several weeks. The newly emerged leaves in each test species were also protected against their respective pathogens. The activity of peroxidase and polyphenol oxidase was significantly enhanced by the extract formulation, leading to the enhancement of systemic acquired resistance in the host plants. The source materials are by-products of banana and marigold cultivation, which at present have no commercial utility.
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