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ParaBoss News - April 2021 - State Outlooks

The Quick Quiz

Hint: Eggs require specific conditions to continue to develop, and hatch after nine to ten days. Image: Peter James
Hint: Eggs require specific conditions to continue to develop, and hatch after nine to ten days. Image: Peter James

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

  1. Do you know the average length of the life cycle of lice?
  2. Do you know the withholding periods for fly treatments?
  3. What is the purpose of a strategic drench?
  4. Will worm resistant goats reduce the level of worm contamination on pastures?

>> Check the answers.

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Have you tried the FlyBoss flystrike tools?

The flystrike tools can assist you in developing a flystrike calendar that is suitable for your location and your enterprise using historic long-term weather data for your location.

State Outlooks for April 2021

Autumn provides a great variety in weather conditions across the continent. Our correspondents have provided tailored information for their regions, though a common theme is the high likelihood of worm trouble and a need to understand resistance profiles.

With many areas receiving higher than normal summer rainfall, barber’s pole worm is causing problems in many more areas as autumn progresses. It’s important to note that the most economically sound time to drench for barber’s pole worm (i.e. to strike the best balance between production loss costs and the cost of drenching/mustering/testing) is long before signs of barber’s pole worm are evident; only regular WEC tests can tell you the ideal time to drench for barber’s pole worm. If signs are evident, your production losses have already cost much more than the cost of drenching earlier, plus you still now have the drenching costs. WEC testing is financially worthwhile.

New South Wales
>> full report

Worm egg counts have been high throughout NSW recently. Our District Vets are highly recommending conducting a WormTest to see if stock need to be drenched. A DrenchCheck or DrenchTest is also recommended to document the current level of drench resistance on your property and enable the best drench choices for your situation.


>> full report

Worms are likely to continue to cause trouble throughout winter and into spring. Pre-lambing drenching with an effective short-acting is worth exploring. If you’re using a long-acting drench, also use a primer and an exit drench.

>> full report

Though some rain is finally falling, much of Queensland is still quite warm. Maxine reminds us that though barber’s pole worm slows in winter, it never truly stops. Remember to monitor worm egg counts regularly to understand the changes in worm burdens — don’t rely on a single test!


Western Australia
>> full report

Brown notes that the season has started well for livestock and worms alike. Regular monitoring of worm egg counts will be vital, and a strategic drench may well be warranted. Nicole also recommends a DrenchTest on this year’s weaners.

>> full report

Things are beginning to cool down in Tasmania, though the conditions remain ideal for worms. Paul has some advice on drenching thresholds depending on the breed and situation, as well as a reminder of the greater risks for autumn lambing ewes.


South Australia
>> full report

Things remain dry in South Australia. Colin reminds us that the most sustainable pre-lambing worm control is preparing low worm-risk paddocks, reducing your reliance on strategic drenching or persistent products.

ParaBoss News is produced with support
from Animal Health Australia

For April 2021 state outlooks, please follow the links below:
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