Say goodbye to flies.

Leaders in natural fly control since 1976

Tired of Fighting Flies?

Welcome to an innovative approach to fly control.

Stop flies before they appear With nature's most powerful solution: fly predators®

Fly Predators are small insects that naturally target and eliminate pest flies, such as house flies and stable flies. The tiny Fly Predators lay their eggs inside the pupae of filth flies, and their larvae feed on the developing flies, stopping the next generation before it hatches. 

The effectiveness of Fly Predators lies in the specific species included in Spalding Labs’ blend. Unlike other products that rely on less effective insects, Fly Predators consist of Spalangia and Muscidifurax — the most scientifically proven parasitoid insects for fly control. 

Spalding Labs Fly Predators are effective natural fly control for the most common pest fly species

Our Science-Backed Fly Control Products

Over 150,000 happy customers!

Take control of your fly problem

Who Are Fly Predators For?

anyone with a fly Control problem!

Making life with animals healthier and happier since 1976

Horse Stables

We provide fly management for equine facilities of any size. Contact us for a free consultation!
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Commercial Agriculture

We provide fly management for any commercial agricultural operation including cattle, dairy, sheep, hogs, poultry, and more. Contact us for a free assessment!
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Veterinary Facilities

Improve the health and comfort of animals in your care. Contact us for a free consultation!
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Zoos & Sanctuaries

We help manage fly populations at zoos, animal sanctuaries, wildlife theme parks, and a variety of other businesses with a large number of animals. Contact us to keep flies under control.
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Hobby Farms

No farm is too big or too small. Contact us for a free consultation!
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Gardeners & Homesteaders

Keep flies from bothering you in your garden or around your homestead.
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Other Operations

We help a variety of businesses such as kennels, agricultural operations, waste processing plants, animal breeding facilities, feedlots, and more. Contact us to see how we can help with your fly management problem!
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What to Expect

Your Personalized Plan

Work with our custom order generator and fly control support representatives to develop a plan that meets your unique needs.

Consultations are completely free because we know no two places are alike.

Automated Shipments

Spalding Labs offers automated shipments of Fly Predators so you always have them when you need them.

Make flies one less thing you have to worry about. Fly Predators can solve your fly control problem while saving you time and money.

Customer Service Support

As a customer of Spalding Labs, we provide exceptional customer service via email, phone, personal representative, and more! Our fly control experts are available to answer your questions and recommend solutions.

How Fly Predators Work

Only 15% of flies are adults. Fly Predators stop flies before you see them.

Fly Predators are nature’s way of controlling fly populations. Spalding Labs Fly Predators are a carefully selected mix of parasitoid insects that naturally target and eliminate pest flies, such as house flies and stable flies. These tiny but powerful insects work to control flies by parasitizing fly pupae. Female Fly Predators lay their eggs inside the pupae of pest flies, and their larvae feed on the developing flies, stopping the next generation before it hatches.

Our custom order generator and on-staff team of fly control experts will evaluate your unique situation to determine how many Fly Predators® you need to manage your pest situation. Once you receive your shipment of Fly Predators®, simply sprinkle the bugs near manure areas every 3-4 weeks during warm months. Want a more detailed explanation? Click the button to learn more!

Natural Fly Control Since 1976

The Spalding Labs Difference

With decades of fly control research and 40+ peer reviewed studies behind our products, Spalding Labs offers the most effective IPM solutions available.

Our science-backed botanical fly spray matches or exceeds chemical spray performance without the use of harsh ingredients.

Our team of fly control experts, including our on-staff entomologist, will help you create a custom IPM plan for your unique property. 

Implement IPM with confidence knowing you’ll have help to solve your fly control problems every step of the way.

Fly Predators® are scientifically proven to stop flies before they start, using only the most effective species of parasitoid wasps.

Fly Predators combined with cultural, mechanical and chemical controls are key to successfully implementing effective fly control solutions.

What Our Customers Say

Feedback from animal lovers across the U.S.

Amanda R.Equine Fertility Specialties, Williamston, MI
WOW! What a difference! I have been getting your fliers for a while but some clients finally convinced me to buy Fly Predators. I have recommended them numerous times and will continue to!
Shelby L.Hidden Acres Equine and K9, Endicott, NY
This was my first year using Fly Predators. After having a HUGE issue with them last year, so bad you couldn't be outside with out getting swarmed by them, I had to do something... A friend recommended using Fly Predators. They have made a HUGE difference and I will never go another year without them!!!
Jennifer T.Supercharge Performance Horses, Cedar Springs, MI
This is our 4th season using Fly Predators and we are seeing a huge improvement. We have not had to put any fly masks or sheets on the horses as of yet and they were normally covered with them by now.
Lisa C.Heringo Labradors, Endicott, WV
I have had my dog kennel for 17 years and have tried a lot of different products and have felt up until now that I have wasted my money. When I received my first shipment of Fly Predators I was skeptical now I am just amazed. The ease of application is a major plus. I hardly ever see a fly and my dogs are very happy.
Jennifer B.Willow Run Veterinary Services, Cheney, WA
We do notice a difference. We recommend Fly Predators to all our clients.
Vicki M.Sendero Whitetails, Lometa, TX
No comparison to past years. Fly Predators have made a huge difference in the quantity of flies in the facility.
Linda H.Dearborn Stables, North, SC
Both Fly Predators and traps have worked wonders. Blacksmiths and Vets love coming to our farm to work!

Contact Our Team

Reach out with questions or to order