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Deosect Fly Killer Spray

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SRP £53.65
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Topical spray to control flies and lice on horses.
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  • Product Details
  • Instructions
Product Details
Deosect Fly Killer Spray A powerful spray to help control flies and lice on horses and donkeys. Administration: Deosect must be diluted before use and then carefully spray over the horse avoiding the eyes and broken skin. Use the table below to work out how much deosect and water should be used. Repeat the application every month. Adult horses: 500ml of diluted solution per animal Ponies: 125ml of diluted solution per animal Deosect Water 10 ml 500 ml 20 ml 1 litre 100 ml 5 litres 200 ml 10 litres Important: In order to purchase this product you will be required to provide the following information about your animal(s): (i) The weight of the heaviest animal to be treated (ii) If the animal is a horse, to confirm if it has or has not been signed out of the food chain In addition, by accepting our terms and conditions at the point of sale, you are confirming that you have a) used this product before, b) are aware of all relevant and necessary safety precautions, c) will only use the product for its authorised purpose and d) will read all product literature.


It is available in
  • 250ml, and 1L

Key Benefits

  • Residule insecitide
  • For the control of flies and lice on horses


  • Active Ingredients
    Cypermethrin Cis 50:Trans 50

Deosect must be diluted and mixed with water to make a solution just before use. A knapsack, hand sprayer or a sponge may be used to apply the solution. The solution should be used within 24 hours. Avoid spraying directly into animals eyes.

One litre of Deosect should be diluted with 50 litres of water. Alternatively, the following table may be used:

• Deosect 10ml diluted with 500ml Water

• Deosect 20ml diluted with 1 litre Water

• Deosect 100ml diluted with 5 litres Water

• Deosect 200ml diluted with 10 litres Water

A medium fine spray is advisable to avoid fogging of the diluted Deosect Spray. Careful attention must be paid to total animal coverage, especially the face, legs, back and hind quarters. The following amounts should be used:

Adult horses:

500 ml of diluted solution per animal.


125 ml of diluted solution per animal.

Fly Control:

The application of the solution should commence at the onset of the fly season and be repeated monthly for general fly control and every two weeks for severe head and face fly control.

Lice Control:

Apply when lice are observed and repeat as necessary at a minimum interval of 14 days.

What our vet says

What our vet says
"This is a long-lasting spray and highly effective. Remember that you must dilute this before use. Always read the instructions carefully before using. A good tip is to keep your horses eyes clean and dry so as not to attract more flies and also keep fly masks spotlessly clean."