Every summer the same debate kicks off in Facebook groups: “Which fly spray actually works?” After years of trying everything from bargain supermarket bottles to premium equestrian brands, I decided to test five of the most popular options side by side over a full summer season. Here’s what I found.
How We Tested
Each spray was used for a minimum of two weeks on the same horse under the same conditions — turned out during the day in a field with typical fly and midge pressure. I assessed longevity (how long does it actually last?), effectiveness (does it stop flies landing?), ease of application, smell, and coat condition after use.
All sprays were applied in the morning before turnout, following each product’s instructions. No fly rugs or other protection was used during testing periods to ensure a fair comparison.
The Verdict
For most riders, NAF Off Citronella is the one to buy. It offers the best balance of protection, longevity, and value. If you’ve got a horse with sensitive skin or you’re dealing with serious midge problems, it’s worth spending more on Carr & Day & Martin Flyguard. And if you’re on a tight budget, Lincoln Fly Repel+ does the job — just keep the bottle handy for a midday top-up.
The natural options are improving but still can’t match the synthetic sprays for outright effectiveness. If going chemical-free is important to you, Equimins Fly Free is the best of the bunch, but manage your expectations on longevity.
Whichever spray you choose, remember that no fly spray is a silver bullet. Combine it with good field management, fly traps, and a fly rug if needed for the best results.
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