Allelopathic effect of leaf extracts of Punica granatum and Spiraea prunifolia against post-harvest rot of tomato and brinjal
Antimycotic activities of different solvent extracts of Punica granatum L. and Spiraea prunifolia Siebold and Zucc. were carried out through agar well diffusion assay at three concentrations (25µl, 50µl and 75µl) against seven fungi causing rot diseases of tomato and brinjal. All the concentration of plant extracts showed antifungal activity against tested pathogenic fungi. Antimycotic activity increased with the increased concentrations of plant extracts. However, higher concentrations proved more effective than lower concentrations. It was revealed from the present study that the ethanolic extract of Punica granatum L. showed maximum antifungal activity against Rhizoctonia solani and Penicillium expansum and least inhibitory activity against Aspergillus niger. However, the aqueous extract of Punica granatum L. showed maximum antimycotic activity against Rhizoctonia solani and Alternaria alternata and least inhibitory effect against Penicillium expansum. It was further observed from the present study that the ethanolic extract of Spiraea prunifolia Siebold and Zucc. showed maximum antimycotic activity against Rhizoctonia solani and least inhibitory effect against Alternaria alternata. Whereas the aqueous extract of Spiraea prunifolia Siebold and Zucc showed maximum antifungal activity against Aspergillus niger and least inhibitory activity against Alternaria alternata.
Keywords: Plant extracts, Concentration, Antimycotic effectiveness, tomato and brinjal, fungal rot pathogens, Inhibition zone.
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