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Australia's resource for control of worms, flies and lice in sheep,
and worms in goats

From the Editor

For the next few weeks, producers will have a few parasite issues on their mind.  Fairly widespread rain has been largely welcome and worm/fly activity will depend on what happens next.  More rain and mild conditions will increase fly and worm activity.  No more rain and hot conditions will probably mean little change.

There are a few simple principles to keep in mind:

1. Don't guess about the level of worm activity—monitor it with Worm Egg Counts (WECs)

2. Test drench effectiveness—drenches to which worms are resistant look effective (the animals appear to respond), but relief is short lived and reappears rapidly and more severely.

3. Use proven tools to help—Drench Decision Guides, and seek professional advice if you are at all uncertain or have resistance issues.

Arthur Le Feuvre

Feature articles

Worm resistant rams—understanding WEC ASBV terminology

from the WormBoss web site

You've heard that using low WEC ASBV rams will improve your flock's resistance to worms, but what do all these ASBV things really mean? >> Read more.

Treating struck sheep: which chemicals kill maggots

from the FlyBoss web site

When treating struck sheep, remaining maggots need to be killed quickly. The IGRs: cyromazine and dicyclanil are not good choices alone.  >> Read more.

Understand lice to kill them or keep them out

by Deb Maxwell, Operations Manager, ParaBoss

When trying to kill lice or keep them out, it pays to know a little bit about them. Take the 5 question quiz to test your knowledge about lice.  >> Read more.

see State Outlooks below >>


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State Outlooks for January 2015

New South Wales
>> full report

Depending on where you are and the rain you got, worm activity varies from low to dangerous.  The northern parts and the South Eastern LLS are experiencing plenty of Barbers Pole activity.  As usual, those properties with effective grazing management, regular WECs and using drenches tested to be effective are not having too much bother.

>> full report

Recent rain has given pastures a boost.  If further rain falls, worms will get more active and there will be consequences when planning future strategies.  Seek advice if unsure. 

>> full report

Some decent widespread rain at last.  No need for action yet, but, depending on future weather events, start monitoring in about 8 weeks and continue at 6–8 weekly intervals.

Western Australia
>> full report

Those properties with sound management should not be experiencing any issues wormwise.  Future actions should be fairly straightforward—provided you are using drenches tested to be effective.  If your management is poor, you will pay the price later when conditions for worms improve.

>> full report

Welcome rain has improved conditions for many.  Properties finishing lambs under irrigation have hit Barber’s Pole outbreaks, probably due to a steady build up over time.  There is little in common between properties with problems, so the best action is to seek professional advice to stop things getting worse.

South Australia
>> full report

Fires followed by floods have been the order of the day and in many cases more losses than any worm outbreak.  Despite this, there is a risk of Barber's Pole outbreaks.  WECs on weaners show that a significant percentage need drenching.  So, keep up the WECs and start planning pasture management leading to autumn and winter.