Field Investigation On The Repellent Action Of Some Aromatic Plants By Traditional Means Against Anopheles Gambiae S.l. Anopheles Pharoensis And Culicine Mosquitoes Around Koka Central Ethiopia

Various plants are used as traditional repellents against biting insects and other pests inrndifferent parts of the world by different application methods. The present study was anrnattempt to evaluate some of these practices (direct burning and thermal expulsion) onrnOcimum basilicum, Eucalyptus camaldulensis, Corymbia citriodora and Ocimum suave.rnThe study was conducted under natural field condition in selected houses and with fivernby five Latin square experimental design. In another experimental set up (six by six Latinrnsquare design), mosquito coil was used as a standard repellent with the intention torncompare its effects with that of the test plants.rnWhen directly burned, O. basilicum exhibited the highest percentage repellency (73.1%,rnp< 0.001) against An. gambiae s.l followed by O. suave (71.51%, p< 0.001), and C.rncitriodora (70.59%, p< 0.001). E. camaldulensis showed the least efficacy (65.29%, p 0.05). The treatments did not generally showrnsignificant differences among themselves when compared (p> 0.05). Likewise, nornsignificant differences were observed between the two application methods. However, thernplants generally showed higher percentage repellency when thermally expelled. Inrnconclusion, the use of O. basilicum and O. suave against these mosquitoes isrnrecommended as they can easily be cultivated within short period of time by the localrncommunities.

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