Effective Dose of Crude Ethanol and Aqueous Extracts of Phytolacca Dodecandra (Lâ€™ Herit) on Anopheles Gambiae (Diptera: Culicidae) Larvae
Okeyo- Owour J. B.2
Were- Kogogo P.3
1. Department of Applied Sciences, Kisumu Polytechnic, P. O. Box 143-40100, Kisumu, Kenya
2. School of Agriculture, Natural resource and Environmental Studies, Rongo University College, P.O. Box 103-40404, Rongo-Kenya
3. School of Biological and Physical Sciences, Jaramogi Oginga Odinga Technical University, P. O. Box Bondo, Kenya
4. University of Eldoret, P. O. Box 1125-30100. Eldoret, Kenya
5. Kenya Medical research Institute, Centre for Global Health Research, P. O. Box 1578-4100. Kisumu Kenya
Journal of Mosquito Research, 2015, Vol. 5, No. 11 doi: 10.5376/jmr.2015.05.0011
Received: 17 Jun., 2015 Accepted: 18 Jul., 2015 Published: 13 Aug., 2015
© 2015 BioPublisher Publishing Platform
This is an open access article published under the terms of the Creative Commons Attribution License
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Preferred citation for this article:
Yugi J.O., Okeyo-Owour, J B., Were-Kogogo P., Luvaha G.M., Okwiri L.O., Rono T.M and Vulule M.J., 2015, Effective Dose of Crude Ethanol and Aqueous Extracts of Phytolacca Dodecandra (L’ Herit) on Anopheles Gambiae (Diptera: Culicidae) Larvae, Journal of Mosquito Research, Vol.5, No.11 1-6 (doi: 10.5376/jmr.2015.05.0011)
Objective: malaria vector control is either by adult or larvae management. This study reports on the effective dose of crude ethanol and aqueous extracts of leaf and mature green fruits of Endod; Phytolacca dodecandra (L’ Herit) as a larvicide against Anopheles gambiae (Diptera: Culicidae) mosquitoes.
Material & Methods: Batches of twenty freshly hatched or moulted larvae (1st, 2nd, 3rd and 4th instars) of An. gambiae were transferred using droppers into plastic containers measuring 6 cm mouth and 5.7 cm base diameter by 3.5 cm height arranged in sets. Each container contained an approximate of 33 millilitre solution of a particular concentration of leaf (shoot or midsection) or fruit extracts of Endod. Endod plants were sourced from Nyando and Eldoret. The solutions were a serial dilution of 40, 20, 10, 5 and 5 mg/100 mls of the crude extracts. Solutions of Neem and deltamethrin were used as positive control and that of water only as negative control. Three replicates were set up for each concentration. WHO threshold of > 80 % mortality was used as standard to assess effectiveness of the larvicide.
Results: Over 80% of all larvae (L1s, L2s, L3s and L4s) died from exposure to concentrations of 20mg and higher of ethanol extracts of mature green fruits of Endod irrespective of source. Only 40 mg/100 mls of aqueous extracts of Endod leaves of the shoot sourced from Eldoret killed > 80% of exposed L1s. Higher mortalities were observed for extracts from leaves of the shoot of Endod than those from the midsection.
Conclusion: Higher doses of ethanol and water extracts of Endod leaves and fruits were lethal to all stages of An. gambiae larvae.
Anopheles gambiae; Larvae; Phytolacca dodecandra; Neem; Deltamethrin