Testing and monitoring
It is essential to test the effectiveness
of drenches on a property because, with a range
of different factors influencing the development
of resistance, each property is unique and blanket
recommendations are unlikely to be effective
across all properties.
Performing a drench efficacy test on a property
will give an indication of which drench groups
are still effective and allow a grower to devise
a sustainable drench programme based on those products
which are still efficacious. In addition, performing
regular faecal egg counts combined with regular
visual monitoring will allow a grower to only treat
sheep when they need it (i.e. when their worm burdens
are high). This will help to cut down on the amount
of drench used and hence delay the development
of resistance.
|
| “People that don’t
test tend to make very poor decisions
with their drench choices and leave themselves
vulnerable to worm losses” |
| Dr David Rendell, Veterinarian,
Hamilton VIC |
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