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Capacity building and validation of integrated parasite management in prime lambs in Western Australia
The project aimed to quantify the potential loss of growth and value in prime lambs in Western Australia due to worm infections, and to develop integrated parasite management based prime-lamb specific control recommendations. The focus of this study was on the worm species which reduce growth rates in prime lambs (non-Haemonchus sp.). Observations were conducted over 3 years on 14 properties throughout South-West Western Australia, with worm egg counts and lamb weights measured at intervals from lamb marking for the next 105 days. The results suggest that best-practice worm control over the critical period for prime lamb growth should include: ensuring that growth rates are 240 grams per head per day or greater in the first 14 weeks after the start of lambing; conducting worm egg counts about 10 weeks after the start of lambing; weaning and giving an effective (>98%) drench shortly afterwards if the count is over 250 eggs per gram; and drench onto lower worm burden paddock. All of these practices would be cost effective given the significant economic value to be gained when prime lambs are slaughtered around 28 weeks after the start of lambing and they are also relatively easy to implement.
This page was last updated on 23/08/2017
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