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Beyond the Bale : March 2019
ON FARM 39 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 among the sheep. • Drift the sheep slowly between you and a fence in both directions. • Hold the sheep quietly and observe for signs of irritation (biting, scratching, feet stamping) or for a concentration of flies around a sheep. All of these methods are time consuming (and therefore costly) and as the mob size increases, the chance of missing affected sheep also increases. Effective monitoring may be difficult or impossible in rough terrain and/or timbered paddocks. While it is ideal to minimise chemical use, consider your ability to monitor effectively; animal welfare takes precedence. If sheep with advanced flystrike are found, increase your frequency of monitoring, and if appropriate, apply a chemical preventative to all susceptible sheep. Application of a preventative treatment does not remove the need to regularly monitor sheep for flystrike. TREATING STRUCK SHEEP 1. Shear struck wool and a 5cm barrier ring of clean wool around the strike close to the skin to remove maggots and check for ‘maggot runs’. 2. Collect the maggot-infested wool into a maggot-proof (plastic) bag and leave the sealed bag in the sun for a couple of days to kill all maggots. 3. Apply a registered flystrike dressing to the struck area as well as the clean wool ring area to prevent re-strike. 4. Remove severely struck sheep from the mob so they can be closely monitored. 5. Cull all struck sheep because they are very likely to be struck again or next year. To kill remaining maggots on struck sheep, use the fast-acting chemicals that are registered as flystrike dressings (spinosad, ivermectin, OPs), rather than the long-term preventative products containing dicyclanil or cyromazine, which take up to four days to kill maggots. You can search for commercial flystrike prevention and treatment products with the FlyBoss ‘Lice and Flystrike and Products’ tool, including chemical groups, resistance status and withholding periods. Access the tool at www.flyboss.com.au/tools/products MORE INFORMATION www.flyboss.com.au Tests that would cost more than $3,500 are currently being offered free this flystrike season (2018/2019) by the NSW Department of Primary Industries and jointly funded by AWI. The tests assess the current level of pesticide resistance in fly populations. The fly test is only for the Lucilia cuprina sheep blowfly. Samples are accepted from all over Australia. WHAT IS BEING TESTED AND WHY? The following chemicals, which represent all of the major chemical groups, for blowflies are being tested: Spinosad, Imidacloprid, Ivermectin, Cyromazine, Dicyclanil, Diazinon and Diflubenzuron. This project aims to determine the resistance profiles of blowflies and lice across all wool producing states. It is also gathering baseline data on newer chemicals for future reference. CONTACT INFORMATION If you are interested in supplying NSW DPI researchers with maggots from fly struck sheep or fleeces from lousy sheep, please contact: Narelle Sales, NSW DPI Elizabeth Macarthur Agricultural Institute Email: firstname.lastname@example.org Phone: (02) 4640 6446 For flies, the testing process takes approximately 6–9 weeks. After testing you will receive the results for your flock via phone or email. At the end of the project you will also receive the project results showing how products are performing in your region or state. The project will be completed in mid- 2020. Producer confidentiality will be maintained and all property information will be de-identified. FREE TESTS! ARE YOUR SHEEP BLOWFLIES RESISTANT TO CHEMICALS?
In the Shops - March 2019