Please use this identifier to cite or link to this item: http://repository.elizadeuniversity.edu.ng/jspui/handle/20.500.12398/806
Title: Potential Impact of Cypermethrin on Selected Groups of Soil Microorganisms
Authors: Anozie, Patience C.
Ilori, Matthew O.
Amund, Olukayode O.
Schmidt, Stefan
Keywords: Cypermethrin;
Microbial Abundance;
Soil;
3-Phenoxybenzoic acid
Issue Date: 1-Jun-2017
Publisher: Egyptian Academic Journal of Biological Sciences
Citation: Anozie Patience C.; Ilori Matthew O; Amund Olukayode O; Schmidt Stefan (2017).Potential Impact of Cypermethrin on Selected Groups of Soil Microorganisms. Egyptian Academic Journal of Biological Sciences, G. Microbiology, 9(1), 39-50. doi: 10.21608/eajbsg.2017.16342
Abstract: Application of cypermethrin as insecticide during agricultural practices is a global concern due to its toxicity and potential accumulation of its metabolites in the aquatic environment. A mesocosm plot of agricultural land (500 m2) was demarcated and deliberately contaminated with cypermethrin to study its impact on the autochthonous microorganisms. Potential effects of 3- phenoxybenzoic acid (3-PBA), a known suicide metabolite of cypermethrin, on hydrolytic activities were also investigated by using fluorescein diacetate assay (FDA). A significant increase in the abundance of total heterotrophic bacteria from 3.55 x 106cfu g-1to 1.30 x 108cfu g-1in 12 weeks as against the control was induced by the insecticide in the mesocosm. The number of starch hydrolysing bacteria increased after the second insecticide treatment from 6.25 x 106cfu g-1to 2.70 x 107 cfu g-1in three weeks. However, there was no significant increase in the microbial count of fungi, presumptive actinomycetes and nitrogen fixing bacteria during the twelve weeks of experiment. The hydrolytic activity of soil microorganisms was apparently inhibited insoil treated with different concentration of 3-PBAthan in untreated soil. These results suggest that the application of a commercial cypermethrin formulation increased the abundance of selected soil microorganisms while3- PBA reduced the soil microbial hydrolytic activity.
URI: DOI: 10.21608/EAJBSG.2017.16342
http://repository.elizadeuniversity.edu.ng/jspui/handle/20.500.12398/806
ISSN: 2090-0872
Appears in Collections:Research Articles

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