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Answers and links to further information are provided below the image.
1. How many drench actives should be used in a quarantine drench?
2. Breech cover can be used as a selection tool for reducing breech strike susceptibility. However, which other traits are more important to use first?
3. In which lice treatment chemical groups have resistance been found, in Australia?
‘Quarantine’ drench all sheep (including rams) new to the property.
Use a combination of no less than 4 unrelated drench actives with at least one of these being the newest drench actives: monepantel (Zolvix®) or derquantel (with abamectin—Startect®). This can be done using multi-active (combination) and/or single-active products concurrently—up the race with one product, then up the race again with the next.
Do not mix different drenches unless the label states you can, as different products may be incompatible.
The importance of a bare breech in breech strike was investigated and it was found that it was less important than dags and skin wrinkles. However it does play an important part as it can exacerbate the effect of wrinkles and dags.