羊farmers urged to reduce number of ewes wormed at lambing

羊farmers urged to reduce number of ewes wormed at lambing

绵羊农民被敦促进一步削减他们在羔羊的蠕虫中对待的母羊数量,以止动进一步的抗抗性抗性发展。

SCOPS是一种“寄生虫可持续控制”的首字母缩写,说减少数量处理的农民将保护蠕虫的未来在农场上,同时获得储蓄金钱和时间的好处。

The independent industry-led group warns that left unchecked, anthelmintic resistance is one of the biggest challenges to the future health and profitability of sheep farming.

Why treat ewes?

It may be a surprise to many, but worming ewes around lambing is not normally for the benefit of the ewe.

Fit, mature ewes are able to keep worms under control using their immune system. However, if they are under nutritional strain around lambing, their immune system weakens allowing worms in the ewe’s gut to produce a lot more eggs.

This is known as the peri-parturient rise (PPR) and these eggs, if deposited on pasture, will develop into larvae and add to the challenge to lambs later in the season.

Lesley Stubbings of SCOPS said: “The rationale behind treating a ewe is that it removes the worms in her gut and hence the number of worm eggs contaminating the pasture.

问题是,这可能非常有选择性的阻力。好消息是我们知道并非所有的母羊都展示了PPR所以,如果我们能识别这些,只能对待可能发出最多的鸡蛋的人,我们可以达到实用的解决方案。

Which ewes should be treated?

Historically, sheep farmers have been told the higher the litter size, the more likely the ewe was to have a high PPR.

然而,更新的证据表明它是身体状况(BCS)和营养菌株的程度,eWE是最有可能确定PPR的。

这意味着携带双胞胎的良好的母羊,甚至保持其状况的三胞胎,不需要治疗。携带单打的精益母羊应该是。

Ms Stubbings continues: “We can use BCS rather than litter size to determine the need to treat.

“采用这种方法的羊群显着减少了他们对待羔羊的母羊数量。”

What proportion of ewes should I leave untreated?

“为了降低对抗性的大量选择的风险,通常建议将10-20%的母羊在每个放牧暴徒未经治疗中留下。

“However, with mounting evidence that fit, well-fed ewes do not need a treatment, we can now view this figure as a minimum,” Stubbings said.

2018年出版的独立英国研究,由APHA和VMD资助,发现了没有优势in blanket worming ewes at lambing.

There was no difference in faecal egg counts or growth rates of lambs reared on ewes that were wormed compared to those that were not treated at lambing.

Top tips for worming ewes:

  • Leave at least one in 10 of the fittest ewes in each group untreated;
  • Make sure you drench to the heaviest ewes;
  • Check and calibrate drench guns before you start;
  • Take the plunge on scab control.

Take the plunge on scab control:

  • Organophosphate dip must get down to the skin to kill sheep scab mites. This can only be done by plunge dipping for one minute;
  • OP仅被授权用作Plunge Dip。它不能通过淋浴和换乘器使用​​。

“省钱和时间”

Gareth Owen, a producer in Leicestershire who monitors egg counts in his ewes, explained the approach has already had multiple benefits for his flock.

“We have monitored ewe egg output in the run-up to lambing for several years and proved to ourselves that the majority of our ewes do not shed many eggs,” he said.

因此,只有我们的剪切和瘦母羊在羔羊处理,没有损害母羊或其羊羔中的任何后续卵数。

“We must be able to control worms in the long term and am not prepared to risk accelerating the development of resistance on the farm by administering indiscriminate ewe treatments simply because that’s what we always used to do.

“The fact it also saves us a lot of money and time at such a busy period is an extra bonus.”

SCOPS.adds that it is very important that a proportion of ewes is leftuntreatedif a persistent worming product is used.

To minimise the risk of resistance developing, SCOPS and Zoetis have agreed guidelines for the use of moxidectin in ewes around lambing.