A powerful and effective residual insecticide, Deosect, produced by Zoetis, is specially developed for the control of flies and lice on horses. Sweet itch horses can be plagued by midges.
Not suitable for use on any animals for human consumption. POM-VPS
Please note: As this is a flammable product it cannot be sent via Royal Mail so will incur a delivery charge.
We recommend you undertake a patch test before using on your horse. Deosect must be diluted prior to use and according to the manufacturers instructions.
Below is the product datasheet. This has been provided by the manufacturer and should always be provided with the medication.
Company name: Pfizer Limited
Address: Ramsgate Road
Kent CT13 9NJ
Telephone: 0845 300 8034 (Out of hours: 01304 616161)
Fax: 01737 332521
Cutaneous spray, solution.
Clear yellow liquid free from solids, containing Cypermethrin technical (cis 50: trans 50) 5.0% w/v (0.1% w/v when diluted).
Topical spray to control flies and lice on horses.
Deosect Spray 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 (2 pints) of Deosect should be diluted with 50 litres (11 gallons) of water. Alternatively, the following table may be used:
|10 ml||500 ml|
|20 ml||1 litre|
|100 ml||5 litres|
|200 ml||10 litres|
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.
Ponies – 125 ml of diluted solution per animal.
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.
Apply when lice are observed and repeat as necessary at a minimum interval of 14 days.
For animal treatment only.
For external use only.
Do not apply to any lesions where the skin is broken.
Do not spray in or near milking parlours or where milking machinery may be contaminated.
This product belongs to the pyrethroid group. Possible undesirable effects can be irritation and allergic reactions on the skin.
The product can be safely used during pregnancy and lactation.
Deosect spray is of low toxicity and acute poisoning is unlikely to occur.
Protection of operators
FLAMMABLE. Wear impermeable gloves, face shield and rubber boots when handling the concentrate, diluted liquid and when spraying animals.
Use in a well-ventilated area and avoid inhaling the spray mist. If splashed in the eye or on the skin, wash with plenty of clean, running water immediately and seek medical attention.
Remove contaminated clothing immediately and wash before re-use.
Do not smoke or eat while handling the product.
Wash hands and exposed skin after handling this product and before meals.
Not to be used in animals intended for human consumption. Treated horses may never be slaughtered for human consumption.
The horse must have been declared as not intended for human consumption under national horse passport legislation.
Shelf-life after dilution according to directions: 24 hours.
Protection of the Environment
Dangerous to fish and crustaceans. Do not contaminate ponds, waterways or ditches with the product or used containers.
Any unused veterinary medicinal product or waste materials derived from such veterinary medicinal products should be disposed of in accordance with local requirements.
Do not store above 25°C. Protect from frost.
Store in original container, tightly closed, in a safe place away from food, drink and animal feedstuffs.
Keep out of reach and sight of children.
1 litre or 250 ml oblong, unlined tin-plated mild steel can with a tin-plated mild steel cap (screw-fit).
Not all pack sizes may be marketed.
All prices include VAT where applicable.
Under almost all products on our website is an Estimated dispatch time, check this for a delivery prediction specific to the item you are looking to purchase. These badges are updated live based on the stock levels we have and also those of our suppliers - so are usually very accurate, but cannot be guaranteed. In more general terms, we aim to dispatch all orders within 1 working day of receiving payment (and a prescription if required). If we cannot do so within 3 working days we will contact you by email.
For UK delivery, we charge the following:
Prices quoted are for delivery to all parts of mainland UK except certain Scottish postcodes (where the price is higher for items sent by courier. Delivery of food abroad (including Channel Islands, N. Ireland and other islands around the UK) is charged at a higher price and free delivery is not available. Temperature controlled products, such as Insulin, are also not always subject to the standard and/or free delivery options.
For full information on our delivery charges, including prices on heavy deliveries to Scotland and abroad, see our delivery information page.
We can deliver most items to all around the world, but prices do vary. The majority of light weight orders (less than 1.5kg) can be delivered for a flat rate of £10. For an accurate estimate of the delivery charge, please put the items you require in your basket and use the "Estimate Delivery" system on the shopping basket page (you only need to enter your country and postal/zip code) for a quick quote. For deliveries to the USA you may need to go to the checkout page and enter your full address to get a quote (as some services need your state in order to quote too). For more information on international deliveries, please see our delivery information page.
Due to air freight restrictions aerosols cannot ever be sent abroad by Royal Mail. We appreciate your understanding.
Some products, such as insulin and frozen food, need to be delivered in insulated packaging to prevent them from getting too warm (or too cold) during transit from us to you. Purchasing any of these items in your order will result in a £1.99 charge being added to the total to cover the high cost of the insulated packaging materials. You only pay the £1.99 once per order, regardless of how many temperature controlled items you purchase in that order.
Please call us as soon as possible if you need to amend or cancel an order on 01582 842096. If your order has been processed for dispatch we will be unable to cancel or amend the order. You will however be able to return your product for a full refund*.
To return an item, you must contact us by phone or email to arrange this BEFORE posting any product back to us. We will explain the process at this stage for you.
*For full details on returns, see our terms and conditions page.
Below are some recent questions we've received regarding Deosect Spray, including answers from our team.
Can I use deosect on a clipped horse? My horse is half clipped and the flies are really bad at our yard so I need to apply deosect to him.
Deosect can be used as normal on a clipped horse (though should not be applied to anywhere that the skin has been cut). It you are just wanting to repel flies then you could consider one of the DEET containing products. They are usually very effective. (Examples would be the NAF OFF DEET products, but there are many others too on the website).
Can in use deosect on my cats?
Can I use deosect on my cats?
This product is toxic to cats and should not be used on them!
My dog has come in with ticks nearly everyday for the past 2 weeks from our farm and I was wondering if deosect might help deter them? She's regularly spotted with advocate also.
Deosect is licensed for horses only, so in order to supply it for your dog, your vet would need to prescribe it for her and you send us the prescription. If this is something you'd like to speak to your vet about, we'd be more than happy to help you.
There are some other, non-prescription options that would be good to try first. I'd recommend trying the Scalibor Collar, which contains a similar potent repellent and insecticide. It offers up to 6 months protection and is much easier to use as it is just worn by the dog. Together with Advocate, I'd be very confident that your dog would be well protected. the collar would help to deter them from biting in the first place, and if they do, both products would result in a quick death of the tick. Most ticks should die and drop off but if not, they can be safely removed with a tick remover like this one.
Please get in touch if you have any further questions, I hope this has been helpful!
My horse is very itchy, can't see lice,mostly around her back and sides. Could you suggest what I could use. Was thinking deosect. Thanks
There are lots of possible causes of itching and only a few of them would be treated by Deosect. If there are lice present then Deosect is a good treatment but lice are not that difficult to spot. You should get a simple hand lens if possible and in good light, part the hair and look closely near the skin. Lice move about and can be seen if you look for a while. If you really cannot find any, it is most likely that lice are not the cause and there is no point in using Deosect.
You should try and get a diagnosis before attempting treatment. A visit from your vet might help identify a bacterial skin infection or suggest an allergy or something. Treatments can be very different for the different causes. Are there any other horses in contact with yours. Are they itchy? If in doubt, I suggest you call in your vet.
Hi our fell suffers with sweetich. Would you recomend deosect to help prevent outbreak. If so how often and are we OK use fly rug 24/7 with it ?. We also give garlic and veg oil with chaff. What would you recommend....
Deosect contains cypermethrin, a powerful insecticide that would effectively kill the midges responsible for sweet itch. This product is long lasting and can be applied every 2 weeks if needed, but applying more frequently than this is not recommended. Deosect should only be applied to healthy skin, and must not be applied to broken or sore skin. A sponge is often the best method to applying around delicate areas and the face.
I would use a strong insect repellent alongside it, such as NAF Off DEET Power, which can be re-applied as often as needed. NAF also do a very good D-Itch Ointment which can be applied to affect areas up to twice a day to soothe irritation while acting as a barrier and repellent.
Aside from this, I would avoid turning your horse out at dawn and dusk, which is peak feeding time for midges. Also try to avoid grazing near standing water, old water troughs and boggy fields and away from moist muck heaps. If he has trouble with midges in his stable, mounting a fan should help as they are very weak fliers and will find it more difficult to land and feed.
I hope you will find these suggestions helpful, please get in touch if we can help further.
Cob with itchy legs
Does this kill leg mites my poor horse keeps itching rubbing his legs
Deosect is not the usual treatment for leg mites in horses. There are other causes of itchiness affecting a horse like this, but mites are very possible. The most common treatment would be to clip off all the feathers, shampoo the affected area to remove all dirt and scabs if present, then use a topical treatment with activity against mites. LimePlus Dip is the product usually sold for this. Tretment once per week for 4 weeks might be needed. It is also common for some horses to have mites but show no signs but to carry them and then pass them on to the treated horse later. Ideally you should ask your vet to perform skin scrapings to check if mites are the cause. Your vet could prescribe Frontline Spray to treat them. That is usually effective too, but needs a prescription. LimePlus Dip isquite smelly, but is safe and is as effective as any other treatment.
I'm looking for an effective fly repellent for my horses that are in regular work so are washed on an almost daily basis. Does this product need to be reapplied every time the horse is bathed?
This product has some persistence when horses are washed, but it is not documented how effective this is. I do not think that you should apply it as often as every day, though you could certainly apply it every 2 weeks. You would hope to be able to observe how well it seems to work, then notice when the effect is wearing off. If it is not adequately effective, you could alternate between this product and one of a completely different nature. (The compound DEET is often regarded as the most powerful insect repellent and this would be my observation too. It is available in products like "NAF Off DEET Power" which is also a good product.)