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Beyond the Bale : June 2018
It is important to minimise worm infections of your lambs as they have little immunity to the parasite. Worms can affect lambs’ growth and even survival rates. WHAT DRENCH SHOULD BE USED? Effective, short-acting, combination drench products are the best first option. • Effective: proven on your property to decrease the worm egg count by 98%. • Combinations: fewer worms are able to resist combinations of different drench groups given at the same time. • Short-acting: long-acting products have greater potential for development of drench resistance (especially moxidectin given pre-lambing). In southern Australia, or with prime lamb mothers in other areas, a macrocyclic lactone (ML) as one component of a winter/spring drench removes scour worms, which can benefit milk production in high performing ewes. LAMB MARKING TO WEANING WormTest ewes a week or so prior to lamb marking. Your paddock preparation has been effective if a drench is not required at lamb marking. However, if the ewes need drenching at marking, also drench the lambs. WormTest again mid-way from lamb marking to weaning and drench if required (consult the Drench Decision Guide for your region). WormTest ewes prior to weaning. In all but the driest sheep production areas, lambs typically receive a drench at weaning; WormTest them only if drenching is not routine. In some areas this drench, either for ewes or lambs, may coincide with a ‘first summer drench’. WHAT ELSE CAN MAKE A DIFFERENCE TO WORM CONTROL AT LAMBING? Decreasing the exposure of ewes to worms during lambing can have a substantial impact. • In the summer rainfall areas, prepared low worm-risk paddocks reduce exposure of ewes and sets the scene for lower across- farm worm burdens. • In winter rainfall areas, the dry summer combined with ‘smart-grazing’ can be used to prepare lambing paddocks. • In the southern half of Australia, you can monitor worm egg counts of sheep in the lambing paddocks in the months before lambing and use the paddocks that had the lower worm egg counts to lamb down the most susceptible lambing ewes. More information www.wormboss.com.au/programs At lambing and during lactation, a ewe’s immunity to worms temporarily declines. PHOTO: Deb Maxwell. PARABOSS: BEST PRACTICE ADVICE FOR MANAGING SHEEP PARASITES ParaBoss is a suite of three products – LiceBoss, WormBoss and FlyBoss – developed to help sheep producers in the management of lice, worms and blowflies. The LiceBoss, WormBoss and FlyBoss websites are sources of detailed management information and regional programs that will assist in managing the major parasite risks for sheep. The websites have been developed by expert panels of parasitologists and veterinarians from across Australia. ParaBoss provides access to the three websites at www.paraboss.com.au. Subscribe to ParaBoss News, the twice monthly free email newsletter with state outlooks on the current state of sheep parasites as well as feature articles and the quick quiz to test your knowledge of sheep parasites. You can subscribe on the ParaBoss website. Join us on Facebook at www.facebook.com/paraboss.com.au to see weekly posts on flystrike, lice and worm control. ParaBoss is funded by AWI and MLA and coordinated by the University of New England with industry oversight. More information www.paraboss.com.au ON FARM 47
In the Shops - September 2018