The quiz questions are taken from:
The online learning pages focus on the important topics within worms, flies and lice and offer two approaches to learning: structured reading and question and answer.
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Answers and links to further information are provided below the image.
1. Do Strategic drenches rely on worm egg counts?
2. Can you graze sheep when preparing low worm risk paddocks?
3. What are the five withholding periods/intervals for worm, lice and fly treatments for sheep?
4. At what time of year is the most important time to give a strategic treatment for liver fluke to either goats or sheep?
Strategic drenches are generally given regardless of the average worm egg count of the mob, with some exceptions.
In summer rainfall areas it is best to give these drenches (weaning and pre-lambing) without a count being done.
In winter-rainfall, scour-worm regions where second-summer drenches are used these should be based on a worm egg count. Likewise adults can be checked in drier areas/times before other strategic drenches. In either case if the count is greater than 100 epg, drench.
There are seven common strategic drenches; not all are used in every region. The WormBoss programs outline which strategic drenches to use in each region.
Yes, but only in two situations:
a) When sheep/goats do not have worm eggs in their dung.
This is in the 2–4 weeks immediately after the stock received a short-acting drench product proven effective on that farm:
Longer with a mid-length or long-acting drench—don’t assume the label claim is what you will achieve, monitor worm egg counts regularly to identify the length of protection you actually achieve.
b) During lengthy periods of either/both cold or dry—when it is too cold or too dry for worm eggs to hatch. The temperature varies for the worm species.
The five withholding periods/intervals for worm, lice and fly treatments for sheep are:
These limits are set in Australia to ensure that:
The most important treatment is the April–May treatment, and a highly effective flukicide (one based on triclabendazole) should be used.
One to three treatments may be needed per year, depending on the severity of the problem, these are generally: