In collaboration with Elanco Animal Health, sheep industry Stakeholders including the National Sheep Association (NSA) are urging sheep farmers to consider advice from the Sustainable Control of Parasites in Sheep (SCOPS) group and use two of the newer wormer groups.
Using 4-AD orange and 5-SI purple wormers removes the build-up of worms that have survived previous treatments and slows the development of resistance to the other groups of wormers. They should be used as quarantine treatments for all incoming sheep and as a one-off treatment for lambs in the latter part of the grazing season following a worm egg count if necessary. More information can be found here.
In order to remove the risk of resistance to these newer groups of wormers, lambs staying on the farm should be treated and returned to the same fields for 5 days before moving them to cleaner grazing. More information can be found here.
For more information on the sustainable control of parasites, please see the SCOPS website.