Citronella-based fly sprays are a popular, low-toxicity option for repelling flies, gnats, and other pests around horses, dogs, and stables. This guide highlights top citronella-containing products, focusing on lasting protection, ease of use, and skin-friendly formulas. Whether you’re safeguarding turnout time or maintaining a clean barn environment, these selections balance performance and practicality for American riders and pet owners.
Summary of Selected Products
| Product | Brand | Key Benefit | Link |
|---|---|---|---|
| Endure Sweat-Resistant Fly Spray for Horses | Farnam | Up to 14 days protection, sweat-proof | Amazon |
| Wipe II Brand Fly Spray with Citronella | Farnam | Minimal application with strong coverage | Amazon |
| UltraShield EX 32oz Sprayer | Absorbine | Weatherproof, broad-spectrum protection | Amazon |
| Nulli-Fly Horse Fly Spray (Citronella) | Pyranha | Sensitive skin formula, ready to use | Amazon |
| Repel-X Insecticide & Repellent | Farnam | Multi-species protection in one bottle | Amazon |
Farnam Endure Sweat-Resistant Fly Spray

Endure Sweat-Resistant Fly Spray is designed for horses facing tough weather and heavy sweating. This formula remains active up to 14 days, providing a protective barrier that helps prevent exposure to deer ticks and other biting insects. With multiple active ingredients, it’s formulated to withstand rain and heat while maintaining effectiveness on the coat. Application is economical—users report needing less spray to achieve broad coverage, which aligns with routines during peak fly season.
Key considerations: long-lasting protection, sweat resistance, and compatibility with active outdoor schedules. For barn managers and riders dealing with moisture, Endure offers a straightforward option that minimizes reapplication frequency without compromising safety or efficacy.
Farnam Wipe II Citronella Fly Spray

Wipe II is a low-odor, ready-to-use spray that combines citronella with Farnam’s protective components. Designed to protect against six fly species plus gnats and mosquitoes, the product emphasizes a minimal-application approach—about 1-2 ounces per horse per day. The finish leaves coats with a bright, brushed look, making it a popular choice for daily turnout and grooming sessions. The formula aims to balance protection with coat appearance, reducing residue while still delivering reliable defense against common pests.
Absorbine UltraShield EX

UltraShield EX is a well-known, ready-to-use insecticide and repellent with a water-based formula designed for horses, dogs, and premises. It claims protection against 70+ insect species, including flies, mosquitoes, ticks, and fleas. The UltraBond technology promises weatherproof performance for up to 17 days, a notable duration for outdoor use. The product requires no mixing, offering convenience for sprayers and barn staff while maintaining a broad spectrum of repellency.
Pyranha Nulli-Fly (Citronella)

Nulli-Fly stands out for horses with sensitive skin. This water-based formula targets a wide range of pests, including stable flies, horn flies, deer flies, gnats, mosquitoes, ticks, lice, and more. It is pre-mixed and ready to spray, with a citronella scent that many horses tolerate well. The emphasis is on irritation-free protection, making it suitable for daily turnout and sensitive cohorts. The stronger-than-typical formulation aims to deliver maximum insect control without heavy residues.
Pyranha Nulli-Fly (Citronella) – Second Entry

This version of Pyranha Nulli-Fly reinforces the same benefits as the previous Nulli-Fly listing: a water-based, ready-to-use formula designed for sensitive skin, with strong efficacy against a broad pest spectrum. The citronella scent supports user acceptance and routine use, and the formula is designed to stay evenly blended, avoiding the need for constant mixing. It’s positioned for riders who want dependable protection with minimal preparation.
Buying Guide: Citronella Fly Sprays—What To Look For
Key purchase considerations help compare products beyond marketing claims. The following factors span multiple perspectives, including rider routines, animal sensitivity, and climate conditions.
- Protection duration: Look for labeled protection lengths (days or hours) and weatherproof claims. Longer durations reduce reapplication during rainy seasons or hot spells.
- Skin and coat compatibility: For horses with sensitive skin or light-colored coats, favor water-based or low-irritant formulas and citronella blends designed to minimize residue.
- Species coverage: Consider whether you need protection for horses only or also for dogs, kennels, and barn premises. Some products cover multiple species in one bottle.
- Application method: Ready-to-use sprays save time, while concentrated formulas may require dilution. Choose based on your barn’s routine and equipment compatibility.
- Aroma and tolerability: Citronella scents appeal to many users, but sensitivity varies. Ensure the scent is not overwhelming to horses or humans.
- Active ingredients: Review the active ingredient blend for efficacy against flies, gnats, ticks, and mosquitoes, and ensure there are no conflicting additives with other products used in the same environment.
In practice, a combination approach can work well: a long-lasting, sweat-resistant spray for turnout days, complemented by a lighter, citronella-based spray for grooming and stalls. For property managers, vehicles, and dog areas, multi-species formulas offer streamlined inventory management without sacrificing performance.