IJFANS International Journal of Food and Nutritional Sciences

ISSN PRINT 2319 1775 Online 2320-7876

Efficacy of medicinal plant extracts against Xanthomonas axonopodis pv. punicae causing bacterial blight of Pomegranate

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G. B. Labade, S. P. Surve
» doi: 10.48047/IJFANS/S3/128

Abstract

Pomegranate (Punica granatum L.) is economically importance fruit crop having high great therapeutic value. It is a good source of carbohydrates and minerals such as calcium, iron, sulphur, vitamin-C. The crop is infected by Xanthomonas axonopodis pv. punicae which caused ‘bacterial blight’ disease, which is responsible for deceased yield (nearly by 80 %) and quality of fruits affecting the marketing value of fruits. The disease symptoms can be initially found on stem part which gradually pervades to leaves and then to fruits. Management of this disease with the help chemicals and antibiotics is very difficult task and farmer suffers from economic losses. In the present study, efficacy of methanolic extracts of four medicinal plants were tested against Xanthomonas axonopodis pv. punicae in vitro by measuring the zone of inhibition by disc diffusion method. Out of four medicinal plant extracts Withania somnifera (Ashwagandha) showed maximum antibacterial activity and caused zone of growth inhibition of Xanthomonas axonopodis pv. Punicae at different concentration. Withania somnifera (Ashwagandha) leaves extract were found significantly superior in inhibiting the growth of Xanthomonas axonopodis pv. punicae with recorded average zone of inhibition (15.4 mm). The plant extracts showed antibacterial activity and caused inhibition of growth of Xanthomonas axonopodis pv. Punicae maximum inhibition of the test bacterium was showed by Withania somnifera (Ashwagandha) extracts among, Justicia adhatoda (Adulsa), Ocimum sanctum (Tulsi), and Aloe barbadensis (Aloe vera).

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