Volume & Issue :  Volume 4 Issue 5                                                                                                                              

Abstract

The Lamiaceae family contains several medicinal plants, widespread tendency in folk medicine. This study presents antibacterial activities evaluation of P. barbatus  in different extracts obtained were tested for their antimicrobial activity against three bacterias namely B. cereus, E. coli and L. bacillus . The highest antimicrobial activity was exhibited by the aqueous and acetonic extracts in almost all the pathogenic bacterias using the well diffusion method. In the chloroform root extracts observed the maximum inhibition were (26.33±1.45) were at 80 µl on E.coli, in the aqueous root extract maximum inhibition (25.5±1.38) were observed on at 80 µl on E. coli. In acetone root extracts (22.83±1.19) were at 80 µl on B. cereus, petroleum ether root shows the maximum inhibition (22.0±1.06) at 80 µl on L. bacillus. The aqueous extracts were much active against all the bacteria tested. The antibacterial activity shows that the zone of inhibition is increasing with the increasing concentrations in all the extracts.

Key word

Antimicrobial, Antifeedant, Diterpene and Plectranthus.

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