Fly control is essential for barn hygiene, animal health, and worker comfort. The following picks represent a mix of sprays, traps, and attractant-based systems designed to reduce both indoor and outdoor barn fly problems. Each product is popular among farmers and equestrian facilities for practical, low-maintenance operation.
| Product | Type | Key Benefit |
|---|---|---|
| Revenge Barn & Stable Fly Spray | Premise/On-Animal Spray | Controls multiple pests including flies, fleas, ticks; usable on animals and in stables |
| RESCUE! Outdoor Disposable Hanging Fly Trap | Outdoor Fly Trap | Quick, disposable setup with attractant bait |
| Flowtron Bug Zapper | Electric Insect Zapper | One-acre coverage with high-voltage grid for continuous kill |
| Formula 707 MultiFly Pellets | Feed-through Fly Control | Insect Growth Regulator to break the life cycle |
| TERRO Fly Magnet Trap | Reusable Fly Trap | Poison-free trap with refillable bait |
The following sections highlight five top options, detailing setup, placement suggestions, and how they work best in a barn setting. Each product is presented with its official features and practical considerations to help readers choose a strategy that fits their operation.
Revenge Barn & Stable Fly Spray Overview

The Revenge Barn & Stable Fly Spray from Bonide is a versatile concentrate designed for both premise use and on-animal applications. It targets a range of pests, including flies, spiders, fleas, ticks, and more, making it suitable for barns housing livestock such as horses, cattle, goats, sheep, swine, and even poultry. This broad-spectrum approach can reduce fly populations where animals congregate and in surrounding areas, helping to lessen irritation and potential disease transmission. When used as directed, it can be integrated into routine quarantine or grazing routines, especially during peak fly seasons.
RESCUE! Outdoor Disposable Hanging Fly Trap

This set of disposable hanging fly traps offers a fast and low-maintenance solution for outdoor barns or pasture areas. The traps use an attractant bait to lure flies, which then drown in water after entry. They are designed for easy disposal once a trap is full, minimizing handling time and mess. For best results, place traps at least 20 feet away from living spaces and away from feed storage to avoid attracting nuisance flies indoors. This option is particularly useful for perimeters and open-air stalls where flies gather near manure and moisture.
Catchmaster Giant Fly Trap 3-Pack

The Catchmaster Giant Fly Glue Trap is a large, paper-based adhesive trap designed for outdoor and indoor use in barns, garages, greenhouses, and waste areas. It provides long-lasting capture without the need for bait. Users can extend efficiency by removing old paper and exposing fresh adhesive, enabling extended protection across expansive areas. While it lacks instantaneous kill mechanisms, its practicality and scale make it a strong companion to other control methods in large spaces prone to fly buildup.
Waterbury Country Vet Flying InsectKill System

The Waterbury Flying InsectKill System delivers automated, 24-hour control for smaller flying pests like gnats and small moths. The metered dispenser works continuously, making it a convenient option for barns that require steady, low-maintenance protection without manual reapplication. This system complements other pest-control measures by reducing nuisance flies inside stalls, near feeding areas, and in quiet corners where insects tend to congregate. It offers a hands-off approach suitable for facilities seeking consistent protection across day and night cycles.
Flowtron Bug Zapper: One Acre Coverage

The Flowtron Bug Zapper provides a powerful outdoor solution with a 40W UV bulb and a high-voltage grid designed to instantly kill a wide range of flying insects, including flies and mosquitoes. Covering up to an acre, this device can be mounted near barn entrances, perimeters, or over outdoor ruminant areas to reduce insects drawn to animals and feed. The unit uses octenol attractant cartridges to enhance lure, and it is designed for continuous operation in outdoor spaces where other trapping methods may fall short in active fly seasons.
Fly Traps Outdoor (3-Pack) By TRURID

The TRURID Fly Traps are reusable, water-activated, and designed to capture house flies and horse flies in garden, yard, barn, or stable areas. They emphasize a non-toxic, all-natural lure and a durable bottle that withstands outdoor elements. This option is particularly suitable for continuous, low-cost deployment around barns, feed storage, and manure handling zones where fly populations multiply. Proper placement—5 to 10 feet above ground and in wind-sheltered spots—can maximize effectiveness.
Formula 707 MultiFly Pellets For Horses

Formula 707 uses Novaluron as an insect growth regulator to disrupt the fly life cycle. This palatable pellet form is designed to be mixed with horses’ feed, providing a proactive approach to reducing fly populations over time. Unlike contact sprays, this systemic method targets larvae in the environment, helping to lower adult populations indirectly. It is noted as safe for horses and is suitable for barn environments where routine feeding occurs.
TERRO Fly Magnet Outdoor Trap

The TERRO Fly Magnet is a reusable outdoor fly trap that uses bait and water to attract and hold flies. It is easy to set up and refill, making it a practical, poison-free option for barn exteriors, near compost areas, or at entry points where flies tend to congregate. Regular maintenance—refilling bait and cleaning the trap—helps sustain effectiveness across the warmer months when fly activity spikes.
Buying Guide: Key Purchase Considerations and Comparisons
- Target pests: Barns face a mix of flies, gnats, and nuisance insects. Choose products that address both adult insects and larvae when possible for a longer-term effect.
- Indoor vs. outdoor effectiveness: Some devices are better suited to outdoor perimeters (traps, zappers) while others focus on indoor stalls or animals (premise sprays, feed-through pellets). A combined approach often yields the best results.
- Method of action: Chemical sprays provide immediate reduction but may require frequent reapplication. Growth regulators and traps offer longer-term suppression with less daily maintenance.
- Safety considerations: Ensure products are labeled for use around livestock and fed areas. Palatable or non-toxic options can be preferred in farms with sensitive animals or frequent human contact.
- Maintenance and cost: Consider the ongoing costs (replacement baits, attractants, or trap paper) and the ease of setup. Reusable options reduce long-term expenses but require regular emptying or cleaning.
- Placement strategy: Position traps and zappers away from feed storage and human traffic, but in locations where flies are most active—near manure, stalls, and entryways—to maximize impact.
- Environmental impact: Prefer products with minimal chemical drift toward water sources and living areas. Non-toxic or low-toxicity traps can be preferable where possible.
- Integration with hygiene practices: Combine fly-control products with manure management, compost management, and regular cleaning schedules to limit breeding grounds.