African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5084

Full Length Research Paper

Evaluation of cypermethrin insecticides on the growth of some selected soil bacteria isolated from Makurdi, Middle Belt, Nigeria

Ebah Esther Eneyi
  • Ebah Esther Eneyi
  • Department of Microbiology, College of Sciences, Federal University of Agriculture Makurdi, Benue State, Nigeria.
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Ehoda Christian Ochofie
  • Ehoda Christian Ochofie
  • Department of Microbiology, College of Sciences, Federal University of Agriculture Makurdi, Benue State, Nigeria.
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Emmanuel Olumuyiwa Onifade
  • Emmanuel Olumuyiwa Onifade
  • Department of Microbiology, College of Sciences, Federal University of Agriculture Makurdi, Benue State, Nigeria.
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Ikala Ruth Ohie
  • Ikala Ruth Ohie
  • Department of Microbiology, College of Sciences, Federal University of Agriculture Makurdi, Benue State, Nigeria.
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  •  Received: 28 December 2019
  •  Accepted: 01 June 2020
  •  Published: 28 February 2021

Abstract

In the present investigation, a total of 30 soil samples were collected from five different sites in Makurdi metropolis to investigate the effect of cypermethrin on some soil bacteria. Physicochemical properties of the soil samples from various sites were determined using standard procedures. Some selected soil bacteria such as Escherichia coli, Klebsiella spp., Bacillus spp., Staphylococcus spp. and Proteus spp. were isolated by the use of serial dilution and pour plating method. The percentage prevalence of Isolates shows that a total of 10 bacteria were isolated with samples from high level accounting for 50% of the isolates, North bank 30% and Wurukum samples 20%. Klebsiella spp. accounted for 30% of the isolates, Escherichia coli 10%, Staphylococcus and Bacillus spp. accounted for 20%. The resistance pattern of the isolates at different concentration (1-3%) of cypermethrin showed that all the isolates could grow in the presence of cypermethrin at 1% except Bacillus spp. However at 2%, only Klebsiella spp. grew; Staphylococcus spp., Escherichia coli and Bacillus spp. were inhibited and therefore showed no growth. These findings revealed that cypermethrin had effects on the soil bacteria at higher concentration inhibiting their growth but tolerated at lower concentration. Therefore, indiscriminate use of insecticides should be avoided and more eco-friendly means of pest control should be employed to reduce the negative impact of synthetic pesticides on beneficial soil organisms.

 

Key words: Cypermethrin, resistance, pesticide, biomass, eco-friendly.