Journal article

The effect of pasture molluscicide on small lungworm infections and the productivity of grazing lambs

Jenny E Hanks, John WA Larsen, Angus JD Campbell



The aim of this study was to assess the effect of pasture molluscicide treatment on the prevalence and severity of small lungworm infections, and the productivity of lambs grazing improved pastures in southeastern Australia. A randomised control field trial of 260 Merino-cross lambs was conducted on a commercially managed farm in South Australia with a history of high small lungworm prevalence. Separate groups of lambs rotationally grazed irrigated lucerne paddocks treated with iron chelate molluscicide or untreated control paddocks. Lambs were monitored every 2-6 weeks from weaning until slaughter with liveweight, lungworm and gastrointestinal nematode infection status measured. At slaughte..

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Funding Acknowledgements

This study was supported by the Scobie and Claire Mackinnon Trust, Meat and Livestock Australia and Fair Dinkum Fertilisers which supplied molluscicide at a discounted price. The Australian Government Research Training Program Scholarship supported the involvement of Jenny Hanks in this study. The authors gratefully acknowledge the farm owners; Josh and Madeline Hancock for their time and involvement, and for making this study possible. Our colleagues from the Mackinnon project are also gratefully acknowledged for their technical assistance (Dianne Rees, Tabita Tan, Daniel Brookes and Ben Linn). Thank you to Cameron Patrick from the Melbourne Statistical Consulting Platform for helpful advice. The authors wish to acknowledge the Primary Industries and Regions South Australia (PIRSA) Enhanced Abattoir Surveillance (EAS) program and JBS Australia for access to their premises to complete sampling.