10.22376/ijpbs.2019.10.1.p1-12 Volume 4 Issue 1 2013 (January - March) Phytochemical analysis of lessThan i greaterThan Cymbopogon citratus lessThan /i greaterThan revealed presence of bioactive compounds such as alkaloids, flavonoids, saponins, tannins, phenols, terpenoids etc. Each of the bioactive compounds were estimated and isolated separately by solvent-solvent extraction for methanolic and aqueous extracts of lessThan i greaterThan Cymbopogon citratus lessThan /i greaterThan . Saponins content was higher in methanolic extracts of lessThan i greaterThan Cymbopogon citratus lessThan /i greaterThan (23.64%). This was followed by terpenoids with highest of all in methanolic extracts (10.2%). Alkaloids were the least present. Isolated bioactive compounds from crude extracts were tested for antibacterial activity against pathogens causing Bovine mastitis such as lessThan i greaterThan Escherichia coli, Streptococcus uberi, Staphylococcus aureus, lessThan /i greaterThan and Coagulase-negative lessThan i greaterThan staphylococcus aureus lessThan /i greaterThan . Terpenoids from aqueous extracts of Cymbopogon citratus have shown antibacterial activity with highest zone of inhibition against lessThan i greaterThan E. coli lessThan /i greaterThan (17mm) and least against lessThan i greaterThan E. coli lessThan /i greaterThan and lessThan i greaterThan S. uberis lessThan /i greaterThan (12mm) by methanolic extracts. Hence terpenoids is important bioactive compounds. Aqueous extracts revealed significant activity as compared to methanolic extracts. GOPINATH. S.M.,SUNEETHA T.B AND SUMER SINGH. Cymbopogon citratus, Terpenoids, Bovine mastitis, Antibacterial activity, Phytochemical analysis, Methanol extracts, Aqueous extracts. 247-253