Australia's resource for control of worms, flies and lice in sheep,and worms in goats
This quick quiz tests your knowledge of sheep and goat parasites and their control.
1. What is a primer drench, and when is it used?
2. What is the difference between worm resistance and drench resistance?
3. Why are lice usually seen in winter?
4. Why are blowflies not usually seen in winter?
>> Check the answers.
Dry conditions continue in many districts, but in others, some rain has fallen and the threat of worm infections has producers evaluating the need for the pre-lamb drench.
Worm testing will assist the management of pregnant and lambing ewes to reduce the post-parturient rise in worm burdens.
Worm egg counts in vulnerable stock are expected to rise sharply this July. Young stock, both sheep and cattle, should be monitored frequently over winter until the end of August.
If you have sheep in the yards WormTest first before drenching. Check pre-lambing ewes for barber’s pole.
The focus is on ewes with lambs at foot, but also on last year’s lambs. Sheep in less than ideal body condition will be especially susceptible to worms.
Consider a long-acting drench (with caveats) if ewe body condition scores are light, pasture shortages at lambing are anticipated, there is evidence of barber’s pole, and ewes will lamb down on barber’s pole infective paddocks.
As lambing and lamb marking progress, it is time to start developing plans for weaning paddocks and undertaking drench resistance testing.