Author(s):

Lakshmi Sri Mottadi, Sandhya Deepika Devara and Taher Ibrahim Shaik

Abstract: Pomegranate (Punica granatum L.) is the important crop cultivated throughout the world well known for its refreshing fruits, nutritional, and medicinal properties. The crop yield of pomegranate is greatly affected by bacterial blight causing Xanthomonas axonopodis p.v. punicae. Treating bacterial blight with chemicals and antibiotics is not very effective because of the high cost expenses and less result in eliminating the infection completely and safely, leaving farmers with heavy economic losses. In the present study 23 plants extracts with 3 solvents viz., Hexane, Chloroform, and Methanol were evaluated for their antibacterial activity against the pathogen Xanthomonas axonopodis by Well Diffusion method and Minimum Inhibition Concentration (MIC) methods. In view of discovering new plant products that effectively inhibit the growth of the pathogen in a safe and economical way. Among 23 plants, plant extracts of Albezzia lebbeck, Catharanthus rosea and Calotropis gigantea showed antibacterial activity. In these three Albezzia lebbeck has given the highest activity at lowest concentration i.e., 10 mg ml^-1 with 15 mm diameter of inhibition zone against the tested pathogen Xanthomonas axonopodis p.v. punicae.

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