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Related Experiment Videos

Control of headfly on sheep.

A J Wright, D B Nichols, J A Badcock

    The Veterinary Record
    |June 27, 1987
    PubMed
    Summary

    Gamma-HCH + paradichlorobenzene and deltamethrin pour-on effectively controlled sheep headfly (Hydrotaea irritans) and improved liveweight gain in sheep. Other treatments showed varied efficacy against this common pest.

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    Area of Science:

    • Veterinary Entomology
    • Parasitology
    • Sheep Production

    Background:

    • The sheep headfly (Hydrotaea irritans) is a significant ectoparasite affecting sheep health and productivity.
    • Effective control measures are crucial for mitigating economic losses in sheep farming.

    Purpose of the Study:

    • To evaluate the efficacy of eighteen different treatments against sheep headfly (Hydrotaea irritans).
    • To assess the impact of these treatments on sheep liveweight gain.

    Main Methods:

    • Field trials were conducted on Scottish blackface and Swaledale ewes and lambs.
    • Eighteen distinct insecticidal treatments were applied and compared for efficacy.
    • Liveweight gain was measured as an indicator of treatment effectiveness and animal welfare.

    Main Results:

    • Gamma-HCH + paradichlorobenzene provided consistently superior control compared to crotoxyphos cream.
    • Pyrethroid-based treatments demonstrated variable efficacy; sprays and eartags were largely ineffective, while pour-ons showed good control.
    • In years with low pest pressure, HCH + paradichlorobenzene outperformed pyrethroid pour-ons.
    • Liveweight gain was enhanced by HCH + paradichlorobenzene and significantly improved by deltamethrin pour-on.

    Conclusions:

    • Gamma-HCH + paradichlorobenzene is a highly effective treatment for sheep headfly control.
    • Deltamethrin pour-on offers significant benefits for sheep growth performance.
    • Treatment choice should consider pest pressure levels and desired outcomes for both control and productivity.

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