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New South Wales worm update - October 2013

LHPA DISTRICT REPORTS

Lachlan LHPA

Belinda Edmonstone and Nik Cronin, Forbes (Belinda.edmonstone@lhpa.org.au)  (nik.cronin@lhpa.org.au)

In the central area of the Lachlan LHPA there were 9 WormTests performed for the month of September with average faecal egg counts ranging from 0 - 500. Individual counts range from 0 – 1040. Generally worm egg counts are low. As pastures hay off, producers need to think about a first Summer drench onto low risk pastures. In the more extensive livestock areas and given the dry Spring it may be worthwhile doing a WormTest first, as if egg counts are low this drench may not be required.

Kasia Hunter, Condobolin (kasia.hunter@lhpa.org.au)

In the western area of the Lachlan LHPA two WormTest  results were received during the past month. The average Strongyle egg count was 426 eggs per gram (epg) with an individual range of 40 – 920 epg. Both WormTests had a predominance of Trichostrongylus (Black Scour Worm) on larval culture (50% and 98%), with some scouring observed by the owner of one of the two mobs tested. Both tests were conducted on adult female sheep. Oesophagostomum (Large Intestinal Worm) constituted 41% of the larval culture from one of the properties. These results certainly demonstrate the importance of conducting WormTests to determine the level and type of parasite burden present in your sheep. With recent rain across the area and an abundance of feed to provide an ideal sheltered environment on pastures, parasites are certainly flourishing.

Central West LHPA

Evelyn Walker, LHPA DV, Dubbo (evelyn.walker@lhpa.org.au)

Dubbo area has already had an early hit with Barber’s Pole worms this month. One property in Dubbo had an average Strongyle egg count of 1,272 made up of 100% Barber’s Pole worms. These were in Merino ewes with lambs at foot. Another property in the Merrygoen area had an average egg count of 1,564 also made up of 100% Barber’s Pole worm but in pregnant ewes. Other parts of Dubbo area had average egg counts of 992 in Merino wethers. Every farm is different, but worms are here.  So bottom line is start checking your sheep mobs now with a WormTest to see whether they have a worm problem and whether a drench is necessary based on egg counts. Don’t wait until you get deaths or sheep going down in the paddock.

Tablelands LHPA

Bill Johnson, Goulburn, (bill.johnson@lhpa.org.au)

The time for the first Summer drench has arrived in all but the higher-altitude parts of the district. The strategic value of this drench cannot be over-emphasised – it is the most important drench on the sheep management calendar. It is not a time to use a partially effective clean-out. For most of us, this means using a drench combining at least two active ingredients, followed up with a worm egg count ten to fourteen days later to ensure it has worked.

Recent worm egg counts continue to identify substantial proportions of Barber’s Pole worms in about 30% of our flocks. Rapidly maturing pastures and generally dry conditions will delay the development of Barber’s Pole worm problems in these flocks. But you can’t afford to be too complacent. Experience tells us that a bit of rain at this time of year will cause these worm eggs to hatch, at least in some parts of the paddock. It is important to know whether Barber’s Pole worms are present in your flock by conducting a faecal worm egg count and requesting the lab to do a larval culture.

DPI Tablelands grazing specialist Phil Graham recently described the current paddock feed situation on most properties as being of good but rapidly declining quality and quantity. The impact on Summer feed supply is predictable, especially for young sheep. Development of immunity to worms in young sheep relies on good feed after weaning. Remember to take the opportunity to train lambs to supplementary feed before weaning.

South-East LHPA

Bob Templeton, Braidwood, (Bob.Templeton@lhpa.org.au)

We are having a hammering with Barber’s Pole worm.  Adult ewes are dying quickly, Merino hoggets dying slowly.  Merino rams are very anaemic and a goat with a very high egg count.  This not normal for this time of year.  Perhaps the mild Winter was a factor but bad drench selection was probably more to blame.  However, a very dry Autumn was not the presumed prelude to the current situation.

Hume LHPA

Amy Shergold,( Amy.Shergold@lhpa.org.au) and Ian Masters, (Ian.Masters@lhpa.org.au)

Tony Morton, (Tony.Morton@lhpa.org.au)

With abundant feed and some bursts of hot weather no clinical disease has been seen due to worms. Counts have varied and Barbers Pole worms in some have made treatment necessary now to prevent problems later in Spring or Summer

Riverina LHPA

Colin Peake, Hay (Colin.Peake@lhpa.org.au)

More WormTests coming in this last month. The tests from extensive pastoral areas have very low counts or zero counts. The tests from small intensive holdings have come back with some higher counts with averages around 340epg & ranges of 80 -560epg. Drench rotation in these holdings is working well with very low or zero epg with 10 day post drench WormTests.

Dan Salmon, Deniliquin (Dan.Salmon@lhpa.org.au)

In the southern part of the Riverina LHPA there have been no reports of clinical disease and some interesting egg counts.

Some egg counts are high for the Riverina (200-400 epg) but most have been low to very low.

Probably the best result is a zero egg count in sheep drenched in December 2012.