The essential oil from the flower buds of Syzygium aromaticum was a colourless oil with a percentage yield of 1.66%. The Gas Chromatography-Mass Spectrometry (GC-MS) analysis of the essential oil is presented in Table . A total of four components were identified from the essential oil. The identified compounds were Eugenol (72.8%), β-caryophyllene (19.5%), αhumulene (2.4%) and δ-Cadinene (1.1%). All the concentrations of the essential oil of S. aromaticum showed mild repellence activities with the highest repellence observed at 200 ppm after 2 hours (Table ). The effect of essential oil of S. aromaticum on adult mortality of C. maculatus over three days post-treatment is presented in Table . There were significant differences (P<0.05) between 300 ppm concentration of clove oil and control at 48 hours infestation. At 72 hours infestation, there were significant differences (P<0.05) between the control and all the concentrations of essential oil of S. aromaticum with the highest mortality of 64.6% recorded at 300 ppm. 37.5 a ± 8.7 55 a ± 12.0 75 a ± 2.9 Solvent (Ethanol) 0 c ± 0.0 0 c ± 0.0 0 c ± 0.0 Means followed by common letters the in the same column are not significantly different at 5%