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1. On average, during which few months of the year will there be the highest numbers of infective scour worm larvae on pasture?
2. Breech cover can be used as a selection tool for reducing flystrike susceptibility. However, which other traits are more important to use first?
3. What management can be done to limit the spread of dermo?
4. Aside from sheep, name 2 other farm livestock species that can carry goat worms?
The availability of infective larvae of the winter scour worms on pasture, typically peaks around June–August (depending upon the timing of the autumn break).
The importance of a bare breech in breech strike was investigated and it was found that it was less important than dags, urine stain and skin wrinkles. However it does play an important part as it can exacerbate the effect of wrinkles and dags.
An alternative approach to using zinc sulphate is to improve management around dipping to avoid dermo spread e.g. don’t hold wet sheep closely together in yards for extended periods, don’t truck wet sheep or choose not to wet-dip in years when the risks of dermo and subsequent losses are greatest.
When dermo risk is high:
Sheep and alpacas can carry goat worms. While young cattle/calves also carry some goat worms, adult cattle tend to have very low burdens of goat worms and contribute very little to contamination of pastures with worms affecting goats.