Fly Population Control

Spotinor Range

Stay on top of fly populations on farm to protect livestock productivity and welfare

Flies can be a costly nuisance to the UK’s cattle and sheep population. In addition to the irritation caused, flies can also transmit a number of diseases, causing both financial and welfare concerns. An effective plan for control should be implemented to control the seasonal surge in fly population numbers, and prevent the development of associated diseases and related productivity challenges caused by these parasites. Fly problems can occur any time between April and November, depending on weather conditions and geography.

There are many risks of not treating flies and external parasites on cattle and sheep, which include reduced milk yields of up to 20%1, increased incidence of summer mastitis, reduced calf weight gain and reduced reproduction in sheep.

In addition, flies are implicated in a variety of serious diseases, for example they can transmit New Forest eye in cattle and sheep.

Did you know?

  • It only takes 10-20 head flies to have a negative economic impact on farm2.
  • The horn fly will feed on blood from cattle up to 40 times per day – this could lead to blood loss and constant irritation for the animal2.

The Spot-on Solution for Cattle and Sheep

Spotinor is a Deltamethrin spot on treatment which is easy to apply and the simple dosing negates the need to weigh animals before treatment and so saves time and labour. It is barely absorbed through the skin; 72% of the active ingredient remains on the skin of the animal, in the place where it is needed most.

Spotinor Features and Benefits

Spotinor_logoSpotinor_ Range

  • Easy dosing- no need to weigh
  • One product for cattle, sheep and lambs
  • Aids prevention of ticks in young lambs
  • Options for dosing- squeeze pack or backpack and gun
  • Zero milk withdrawal in cattle
  • 17 day meat withhold for cattle
  • 35 day meat withhold for sheep

For more information on Spotinor, please contact your local SQP in store or speak to your local Wynnstay representative.


1 Taylor, B.D. et al. Economic Impact of Stable flies (Diptera Muscidae) on Dairy and Beef Cattle production. J. Med. Entomol 2012, 49(1)
2 Walt, R. and Shearer, D. Veterinary ectoparasites, second edition (2001)


Written by: Ceri Jones

Information provided by Norbrook Animal Health

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