LARVICIDAL EFFICACY OF LEAF EXTRACTS FROM THREE ASTERACEOUS PLANT AGAINST MOSQUITO (Culex quinquefasciatus)
DOI:
https://doi.org/10.33003/fjs-2021-0502-528Keywords:
Asteraceous plants, Culex quinquefasciatus, Efficacy, Larvicide, Leaf extractsAbstract
It is well known that the mosquito, Culex quinquefasciatus, badly affect individuals in endemic setting, causing filariasis. Intervention targeting the vector larva has not been given much priority. Therefore, the efficacy of ethanolic extract of Ageratum conyzoides, Bidens pilosa L. and Spilanthes filicaulis and a mixture of these plants in equal proportion was evaluated for larvicidal activities against filarial mosquito Culex quinquefasciantus. Phytochemical screening of the extracts was done by dissolving 5g each of plants in 30ml ethanol and water separately to obtain plant extracts. Samples were qualitatively screened following standard methodology for phytochemicals. Mortality of mosquito larva was examined after 12hrs, 24hr, 36hrs, and 48hrs treatment. Probit analysis for 50% Lethal Concentration was done using GraphPad Prism 9. Phytochemical screening of the plants revealed that Bidens pilos, Spilanthes filicaulis and Ageratum conyzoides contained moderated concentrations of Anthraquinones and Cardiac glycosids, Tannins, and Alkaloids respectively. Complete mortality was recorded with 0.60ml of Bidens pilosa, and Spilanthes filicaulis at 48hours and 36 hours respectively. More so, complete mortality was recorded with 0.40 and 0.60ml of the three plants in mixed proportion at 36 hours and 24 hours respectively. Larval mortality and time mortality were significantly (p<0.05) different. 50%Lethal Concentration for Ageratum conyzoides L, Bidens pilosa L, Spilanthes filicaulis, and mixture of the three plants in equal proportion are 0.33ml, 0.25ml, 0.08ml, and 0.06ml respectively. Results showed that these plant materials exhibit significant activity and could be considered as potent natural larvicidal agent.
References
Burtons, I.; Kates, R. W.; AND White, G. F (2010) “The environment as Hazard†Oxford Unv. Press N. Y Pp3-6.
Davis, W. W. (2000)†Environmental impact studies on erosion affected parts, of Boston†geographical essays. Boston. USA, Pp. 77-77.
Egboka, B.C.E. and Nwankwor, G. I. (2011) “The hydrogeological and geotechnical parameters and agents for the expansion of Agulu-Nanka Gully, Anambra State, Nigeiraâ€. J. of Afr. Earth Sc., Vol. 3, No. 4, pp. 417-425.
Egboka, B.C.E., Orajaka, I. P. and Nwosu, V. C. (2015) “Redox activities as additional causative factors in generation of gully erosion in Agulu-Nanka area of Nigeriaâ€. Science of the Total Environment (STOTEN), Vol. 53, No.3, pp. 217 – 232.
Egboka, B.C.E., Nwankwor, G. I. and Orajaka, I. P. (2016) “Implications of Palaeo-and-Neo-tectonics in gully erosionprone areas of southeastern Nigeriaâ€. Natural Hazards Journal, The Netherlands, Vol. 3, No. 31, pp. 219 – 232.
Kates, R. W. (2012) “National hazards in human Ecological prospects Hypothesis and model†Econ. Geog. Vol. 47: Pp 438.
NPC, (2006). Population and Housing Census, 2006. National Population Commission, Abuja, Nigeria.
Ofomata, G. E. K. (2000) “Erosion in the rain forest of Nigeria†Paper presented at the annual conference of the Nigeria geographical Association, University of Nigeria, Nsukka.
Onyegbule, P. (2015) “Geophysiographic factors of Agulu-Nanka gully Erosion Southeastern Nigeria†Seminar paper presented to Department of geography, Met and Environmental Management, Nnamdi Azikiwe university, Awka.
Press, F. (2010) “solution to global problems require commitment to changeâ€. Geotimes, vol. 35 No. 2, P 7.
Sheng, T. C.; Jackson, J. K.; Krmyenhagen, J.; Nakasthin, N. and Watnapreteep, P. (2011) “Effects of differential strctures on Erosion and run-off†In T. Tangsanchalli and Eggers (eds.) Problems of soil erosion and sedimentation. Southeast Regional symposium. Asian Institute of Technology, Bangkok, Thailand, Pp. 311 – 316.
Stocking, M. A. (2004) “Assessing vegetation cover and management effects†In Lal, R. (eds.) soil erosion research methods St. Lucie Press. Soil and Water Conservation society, Florida Pp. 211 – 232.
Stocking, M. A. (2009) “Examination of the factors controlling gully growth, in De Boodt†in Gabriels, D. (eds.). Assessment of erosion John Wiley and Son London, New York. Pp. 505 –520.
White, A. W.; Bruce, R. R. JR.; Thomas, A. W.; Langdale, G. W. and Perkins, H. F. (2015)“ Characterizing productivity of eroded soils in the Southern Piedmont†Erosion and soil productivity. Am. Soc. Of Agric. Engrs. St. Joseph, Michigan Publication No. 8. Pp. 83 – 95.
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FUDMA Journal of Sciences