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Tasmania worms, flies and lice update - January 2019

Tasmania WormBoss Worm Control Programs

Tasmania WormBoss Drench Decision Guides

Sheep

Goats

Sheep

Goats


Perth: Paul Nilon, Nilon Farm Health (pandonilon@bigpond.com)

 

Like the rest of Australia, Tasmania has had a few hot days in the last few weeks. Once the temperature hits 30–320C we start to wilt. There have been inconsequential amounts of rain since mid-December, but even that amount provided enough of a fillip to make for a good Christmas. Weaning is almost complete (praise the Lord) and the stock look well.

The worms have been fairly quiet. A few worm egg counts (WECs) from prime lamb mobs have been surprisingly high (up to 2000 eggs per gram (epg)). It’s concerning that people would let this type of situation develop, so monitor proactively to avoid getting an unsatisfactory result, and exclaiming “holy F, these lambs need drenching!” Further, the December rain meant that a second summer drench (in this link, see box labelled L) would be on the cards for nearly all areas of the state. I suggest a trigger to drench of 150 epg (much higher than in Victoria, but if we used their trigger worm egg count we would have two summer drenches in two weeks). How do you know when to act if you do not monitor?

Warning

There may be some Haemonchus (barbers pole worm) active on northern properties in the Westbury and Longford areas.  In the last week 3 clients reported lambs that were not growing, not scouring, but a proportion had noticeable bottle jaws.  Egg counts were between 2000–4000.  Larval diff's have not been completed but drenching on spec. seems to have solved the problem.  All of these places graze irrigated grass pastures a lot of the year.  The wet spring may have kicked off the barbers pole earlier than likely.  Indeed, barbers pole is rare, except for Flinders Island and the north coast.  This is a heads-up that it may become more widespread with irrigation.