fbpx
Print this page
Wednesday, 02 June 2021 17:55

Quarantine drenching critical - expert

Written by  Staff Reporters
Farmers bringing stock on to farm are urged to have a quarantine drenching regime in place to further prevent the spread of triple drench resistance. Farmers bringing stock on to farm are urged to have a quarantine drenching regime in place to further prevent the spread of triple drench resistance.

Farmers importing stock onto their farm are being urged to have a quarantine drenching regime in place to further prevent the spread of triple drench resistance.

AgResearch scientist Dr Dave Leathwick says there has been a dramatic upsurge in the number of farms with drench resistance in the past 18-14 months, often involving several different worm species. Leathwick says, as a consequence, an increasing number of farmers are buying problems on a truck.

“There are so many resistant worms out there that farmers are now much more likely to import them onto their farms with brought-in stock.”

He says this does not just apply to those trading lambs, as several documented cases have involved farmers grazing hoggets off the farm and bringing triple drench resistance home when they return.

Leathwick believes it is more important than ever to have effective quarantine treatments or procedures in place. He says this is due to the prevalence and severity of resistance being seen around the country.

Leathwick advises that there are only two drench products which should be considered for the purpose. Those are the drenches that contain one of the newer action families – monepantel or derquantel.

“As there are only two products which meet this criterion, this choice is pretty easy.”

He says in the past, the use of combinations of the older drench families would have been recommended as quarantine drenches, but this is no longer acceptable.

As well as a quarantine drench, imported animals should be held off pasture for at least 24 hours. Where this is not feasible (e.g., unit loads of sheep or cattle) it is recommended that treated stock be held on wormy pastures for 24 hours. They should be followed by adult animals to mop up any surviving worms.

Leathwick also encourages the use of a ‘knock-out’ lamb drench in late summer or early autumn to slow or stop any build-up of resistant worms surviving the routine drenches given earlier in the season.

“In terms of what drenches are suitable for this purpose, the same rules apply, that is products containing the newer action families.” he explains. “There is so much resistance around today that it’s just not worth the risk of using something else.”

Leathwick says the escalation of triple resistance is causing issues for sheep farmers all around the country. It can profoundly affect farmers’ ability to control parasites and continue to farm as they have in the past.

“Those that don’t have it yet need to be extra vigilant to make sure they don’t get it.”

More like this

Milk-based replacers better

Recently published research suggests that farmers should avoid feeding milk replacers with vegetable proteins and fats to lambs in their early life.

Growing concern over herbicide resistance

Herbicide resistance is emerging as a serious and growing threat to New Zealand's food production, with recent surveys by scientists finding half or more of arable farms in some regions have weeds resistant to commonly and used herbicides.

Future-proofing NZ's sheep

Beef + Lamb New Zealand Genetics' Low Input Sheep Progeny Trial is identifying the genetics that will future-proof this country's sheep industry.

Promising early results for facial eczema test

Early results from a pilot study investigating the potential for a laboratory test to determine facial eczema (FE) tolerance are positive, paving the way for more detailed investigation.

National

Why should we do more?

OPINION: Managing our dairy sector's impacts inevitably attracts a range of views. Should we do more, less or stay the…

Cattle sale with a difference

Innovation, loss and resilience have brought the Singh family to the point where it is poised to honour its patriarch,…

O'Connor's overseas odyssey

Agriculture Minister Damien O'Connor continued his overseas odyssey in the past week with multiple meetings in the US, Europe and…

Machinery & Products

Protective tint

Now available in New Zealand, Wildcat Static Cling Tint adds a protective layer to the windows of your tractor, harvester…

New owner for stoll

German company Stoll, the well-known manufacturer of tractor front loaders and attachments that claims to be the second largest producer…

Fert spreaders get a revamp

Kuhn has updated its MDS range of fertiliser spreaders, giving farmers more options to upgrade machines as situations change, rather…

Mowers spring into action

With spring upon us, thoughts turn towards shutting up paddocks for conservation and maybe the purchase of new machinery to…