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The leaf essential oil of Momordica charantia was obtained by hydrodistillation and analyzed by gas chromatography-mass spectrometry. The leaf oil was rich in geijerene (11.2 %), pregeijerene (27.1 %), α-pinene (14.0 %), β-pinene (7.1 %), (E)-caryophyllene (4.6 %), and germacrene D (8.6 %); remarkably different from previous reports of this plant.

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The essential oil of Cnidoscolus aconitifolius was tested for antibacterial activity against 3 bacteria strains: Pseudomonas aeruginosa, Escherichia coli and Salmonella typhi using agar disc diffusion technique. The oil exhibited considerable antibacterial activity at minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of 2.0mg/ml and 20.5mg/ml for E. coli and 2.8mg/ml and 28.2mg/ml for S. typhi respectively, but was ineffective against P. aeruginosa.