The impact of synthetic pyrethroid and organophosphate sheep dip formulations on microbial activity in soil

Tatiana K. Boucard, Charles McNeill, Richard D. Bardgett, Christopher D. Paynter, Kirk T. Semple

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Sheep dip formulations containing organophosphates (OPs) or synthetic pyrethroids (SPs) have been widely used in UK, and their spreading onto land has been identified as the most practical disposal method. In this study, the impact of two sheep dip formulations on the microbial activity of a soil was investigated over a 35-d incubation. Microbial utilisation of [1-14C] glucose, uptake of 14C-activity into the microbial biomass and microbial numbers (CFUs g-1 soil) were investigated. In control soils and soils amended with 0.01% sheep dip, after 7 d a larger proportion of added glucose was allocated to microbial biomass rather than respired to CO2. No clear temporal trends were found in soils amended with 0.1% and 1% sheep dips. Both sheep dip formulations at 0.1% and 1% concentrations resulted in a significant increase in CFUs g-1 soil and [1-14C] glucose mineralisation rates, as well as a decline in microbial uptake of [1-14C] glucose, compared to control and 0.01% SP- or OP-amended soils. This study suggests that the growth, activity, physiological status and/or structure of soil microbial community may be affected by sheep dips. © 2007 Elsevier Ltd. All rights reserved.
    Original languageEnglish
    Pages (from-to)207-214
    Number of pages7
    JournalEnvironmental Pollution
    Volume153
    Issue number1
    DOIs
    Publication statusPublished - May 2008

    Keywords

    • 14C-uptake
    • Microbial biomass
    • Sheep dip
    • Soil processes
    • Substrate utilisation

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