Author(s): Oladoye Sunday Olusegun and Muraina Musa

Abstract: Stem of Chromolaena odorata (Asteraceae) was harvested and the oil extracted by hydro distillation method using Clevenger apparatus. The components in the oil were identified and quantified using Gas chromatography (GC) and Gas chromatography – Mass spectrometry (GC-MS). Twenty compounds were identified in the oil, representing 99.46% of the oil. The major components identified in the oil are α-pinene (13.60 %,), caryophyllene (9.20%), Bicyclo [7.2.0] undec-4-ene (6.76%), β- pinene (4.83%) and Germacrene D (4.70%).