Antibacterial potential of ethanolic and methanolic extracts of herbal plants against Xanthomonas campestris pv. mangiferaeindicae the cause of black spot disease in mango

摘要

Mango ( Mangifera indica ) is an ever-green tree and native to south Asia. Every year different types of pre and post-harvest diseases cause huge losses to mango crop. Susceptible germplasm and favorable environmental conditions contribute toward wide epidemic of diseases. Bacterial black spot disease of mango is caused by X. campestris pv. mangiferae indicae is a big hazard to mango crop when it occurs in severe condition. In the present investigation different types of ethanolic and methanolic plant extracts clove ( Syzigum aromaticum ), hermal ( Peganum hermala ), dhaneya ( Coriandrum sativum ), kasni ( Cichorium intybus ), swanjna ( Moringa oleifera ) and cinnamon ( cinnamomum zylanicum ) were evaluated under laboratory conditions. Results of the experiment showed that Ethanolic and methanolic extracts of Hermal found to be most effective with a mean value of (2.10, 2.30) against Xanthomonas campestris pv. Mangiferae indicae followed by coriander and clove extracts at 50μg/mlconcentration with a mean value of (1.23, 2.26) (1.76, 2.16) respectively on nutrient agar medium.