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Beyond the Bale : June 2012
Worm management and drench resistance summer drenching. l Rotate drench groups, including combinations, to avoid reliance on one group. l Minimise drench frequency by only drenching after a WEC and by using rams selected for low WEC. l In most southern regions (other than Mediterranean climates), preferably use one summer drench, but monitor using WECs. l Reduce exposure of young sheep to heavily contaminated pasture by: - 6 -monthly swapping sheep and cattle or smart grazing or grazing young sheep on new pastures - Rotational grazing (>50 days rest) in combination with a highly effective drench with a short grazing time (less than 21 days) – this appears to be very effective at controlling barber's pole in weaners over the November to March period in summer rainfall regions, but is less effective for other worms. l Ensure sheep maintain body condition targets (BCS 3) and consider protein supplements for lambing/lactating ewes in summer-rainfall regions. Good nutrition appears to improve sheep resilience and immunity to worms. l In southern regions with low worm survival over summer, research suggests leaving a small proportion (five per cent) of adult identified sheep undrenched. This strategy is not recommended for high-rainfall regions where worm For the most comprehensive and effective management of worms, consult WormBoss which represents AWI’s collective knowledge of the management of worms and the reduction of their resistance to drenches. WormBoss is an online tool, available at www.wormboss. com.au, which has been developed by AWI and the Sheep CRC to help producers optimise the timing and effectiveness of drenching and other worm management practices. The aim of WormBoss is to reduce drenching and minimise the onset of drench resistance while increasing animal productivity and profitability. WormBoss was created by leading Australian parasitologists, researchers, extension officers, consultants, drench manufacturers and drench resellers, and it is continually being updated. WormBoss is currently composed of two main sections: asK tHe Boss Ask the Boss is designed to help producers consider all the key issues when making a decision to drench or not drench a mob of sheep. In the Ask the Boss section, users enter key information such as the their regional location, the class of sheep in question, any worm egg counts, the existence of drench resistance data, climatic issues, and the availability of low worm paddocks. WormBoss uses this information to generate a concise report that highlights key issues and options that woolgrowers can use to make decisions and take action against worms. a reFerence section The reference section contains the world’s most comprehensive guide to Australian worms and worm-related issues with information on: l worm management l available drenches and their properties l common sheep worms, their life cycles, effects, diagnoses and treatments l sheep breeds and their relationships to sheep worms. Free montHly email alerts aBout worms in your region One of the most useful features of WormBoss is the free monthly WormBoss email newsletter that provides the latest sheep worm control information and news, as it happens and when it is important for you. This free monthly email newsletter includes a summary of regional sheep worm issues and news from around Australia. Content is coordinated by a technical committee of sheep parasitologists from WA, Queensland, NSW, SA, Victoria and Tasmania, and features input from private veterinarians and consultants and government veterinarians from around Australia. To subscribe to the monthly WormBoss email newsletter, please contact firstname.lastname@example.org and quote “WormBoss” in the subject line. selling more wool on-Farm June 2012 Beyond the Bale larval survival in summer is higher. Advanced management techniques like these are best used with advice from a professional veterinary consultant. More information: See the Healthy and Contented Sheep module of the Making More From Sheep Manual at www. makingmorefromsheep.com.au for further procedures and tools. Visit wormboss at www.wormboss.com.au wormBoss A joint initiative of 29