alexa The Compatibility of Spindor Dust with Poecilia reticul
ISSN: 2155-9627

Journal of Clinical Research & Bioethics
Open Access

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Research Article

The Compatibility of Spindor Dust with Poecilia reticulata for Integrated Mosquito Larviciding

Anogwih JA1*, Saliu JK1, Linton EW2, Makanjuola WA1 and Chukwu LO3

1Department of Zoology, University of Lagos, Nigeria

2Biology Department, Central Michigan University, Nigeria

3Department of Marine Sciences, University of Lagos, Nigeria

*Corresponding Author:
Anogwih JA
Department of Zoology
University of Lagos, Nigeria
Tel: +2348035506661
E-mail: [email protected]

Received date: July 14, 2013; Accepted date: September 27, 2013; Published date: October 07, 2013

Citation: Anogwih JA, Saliu JK, Linton EW, Makanjuola WA, Chukwu LO (2013) The Compatibility of Spindor Dust with Poecilia reticulata for Integrated Mosquito Larviciding. J Clin Res Bioeth 4:157. doi: 10.4172/2155-9627.1000157

Copyright: © 2013 Anogwih JA, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Background: The compatibility of spindor dust (spinosad), a bio-rational larvicide derived from the fermentation of a soil bacterium Saccharopolyspora spinosa, was investigated on the mosquito fish, Poecilia reticulata, and larvae of both Anopheles gambiae s.s. and Culex quinquefasciatus mosquitoes.

Methods: Three replicates of each to different concentrations of spinosad dust under static bioassay were performed to determine the acute toxicity of the larvicide on each organism. To investigate the genotoxic and ultrastructural changes in P. reticulata, the fish were exposed for 28 days to low concentrations of the test larvicide capable of killing 30% and 70% of Cx. quinquefasciatus larvae. Thereafter, gill and intestinal cells were removed at days 3 and 28 respectively, and then processed for epifluorescent and transmission electron microscopic studies.

Results: Spinosad showed no lethal toxic effect on P. reticulata but caused an appreciable mortality to Anopheles and Culex larvae with 24h LC50 values of 59.34 μgL-1 and 73.06 μgL-1 respectively. The larvicide failed to significantly induce micronuclei in the fish as determined with acridine orange assay (P>0.05). Marked damage characterised by pycnotic nuclei, loss of cristae in mitochondria, dense and degraded cytoplasm was mostly found in the exposed intestinal cells of the fish and the damage severity increased with increasing concentration of spinosad.

Conclusion: Spinosad at 49 μgL-1 seems to be the threshold above which severe damage occurred in the fish. Therefore, spinosad is only compatible with P. reticulata for integrated mosquito larval control at concentration not greater than 49 μgL-1.

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