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ParaBoss News - October 2020 - State Outlooks

Shear struck wool and a 5 cm barrier of clean wool around the strike close to the skin to remove maggots Image: Deb Maxwell
Shear struck wool and a 5 cm barrier of clean wool around the strike close to the skin to remove maggots Image: Deb Maxwell

The Quick Quiz

This quick quiz tests your knowledge of sheep and goat parasites and their control. 

  1.  What is the difference between resistance and resilience to worms?

  2. Name a factor that causes a drop in louse numbers.

  3. Do you know five recommended steps to treat fly struck sheep?

  4.  Worms (internal parasites) are currently estimated to cost the Australian goat industry:

a. $100,000 per year

b. $1 million per year

c. $2.5 million per year

>> Check the answers.

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State Outlooks for August 2019

Rain continues to fall in many regions and temperatures continue to climb, which means conditions are right for parasites to thrive. Continue to monitor worm burdens and keep an eye out for flystrike, as timing will be crucial to the effectiveness of your prevention and treatment strategy.

As pastures continue to grow, Colin has provided a timely reminder about scours. Scours in lambs can be caused by a number of things, not just worms, so best to seek a diagnosis before you drench.

New South Wales
>> full report

Worm egg counts across the state have indicated high worm burdens in a number of regions. Remember that conditions that promote good pasture growth also improve worm survival! Continue to monitor worm burdens and drench appropriately. Barber’s pole worm is of special concern at the moment, as conditions are perfect for a spike in egg hatching and development. Fly control is important throughout spring and into summer. Remember that preventing flystrike is generally easier and cheaper than treating a large proportion of struck sheep.


>> full report

As rain keeps falling, worm management will continue to be important. Worm burdens appear to be remaining high, and are causing problems for this year’s weaned lambs in particular. Continue to visually monitor and conduct WormTests to inform the timing or your next drench. Fly and lice issues will remain minimal until temperatures rise, but keep an eye out coming into summer.

>> full report

Queensland has been drier than other states, having largely missed out on significant rainfall so far this year, though there have now just been some falls. Now is the time to get ready for summer, especially if rainfall predictions come to pass. The lack of good nutrition will be impacting immunity right now, so worm booms following rainfall may hit harder. Monitor and test regularly in order to determine when to drench for optimum effect.


Western Australia
>> full report

A priority for the moment is managing worm risks to young lambs. Lambs being weaned should be drenched, as they are highly worm-susceptible. Lambs already weaned should be worm tested regularly to assess and inform any treatments. Weaning also presents an opportunity to check how effective your drenches are. Remember to remain vigilant for flystrike issues, and check in on your parasite management plans to ensure you’re preventing and treating effectively.

>> full report

While there is little to say about worms, ongoing monitoring and management remains important. Flies will be becoming active in the warmer, wetter conditions, so appropriate and effective treatments will be critical this season. Using preventative treatments early may help keep fly numbers down, but beware that heavy rainfall can shorten the period of protection!


South Australia
>> full report

While rainfall has been good, recorded worm burdens have been less than expected. This may change the need for and timing of the summer drench, so conduct a WormTest before you decide on your way forward. Good pasture growth also presents a number of possible causes for scouring, so seek a diagnosis before assuming worms are to blame. Lice and flies are also on the rise, though spring shearing may help reduce the risk.

ParaBoss News is produced with support from

Animal Health Australia

For October 2020 state outlooks, please follow the links below:
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