Corro Stories

9 Fly Control Strategies for Your Barn

By In partnership with Absorbine

“Fly season is the best season,” said no one ever! Let’s face it, flies are a pain. They’re constantly attacking our favorite four-legged friends, hiding out in garbage cans, stalls, feed buckets, muck buckets, and more. From horse flies, stables flies, mosquitoes, and more, flying insects have been pestering horses and humans since what feels like eternity. These winged warriors interrupt peaceful pasture time for your horse and detract from your ability to enjoy precious time around the barn. Worse than the sheer annoyance, flies can also transmit a variety of diseases. While it may be impossible to create a fly-free barn for you and your horse, there are simple steps that you can take to help reduce the number of irritating insects that call your barn home sweet home. Here is our round-up of fly control strategies for your barn!


1. Manure Management

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The less manure on your property, the fewer flies. You’re probably thinking, “But this is a horse farm. Of course, there’s manure.” How you manage the manor is what’s key for keeping flies at bay. For starters, keep your stalls clean and dry by removing manure and wet bedding each day. In addition to reducing fly attracting odors, regularly cleaning and replacing stall bedding eliminates the warm, moist environment flies prefer for laying eggs – helping to reduce the overall fly population. Many types of flies also feed on manure, so removing their dinner can go a long way in helping to deter flies. In addition to keeping stalls clean, removing manure from the pasture helps eliminate the prime breeding and food source for these flying insects.

Instead, try spreading or raking manure to help dry it out and greatly reduces the preferred environment for egg laying flies. If you have large open fields, consider spreading manure in thin layers over your fields with a manure spreader which will help fertilize. If you have less acreage, you can simply rake or drag your pastures to spread the manure around. If you use a manure composting pile, make sure to pile it up rather than out and cover it whenever possible. The increased heat from piling it upward and covering can help make it too hot for flies to lay eggs. Take that flies!

2. Fly Parasites

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In addition to proactive manure management practices, consider using fly parasites. Fly parasites are tiny burrowing insects that are a natural enemy of a wide variety of nuisance flies. Fly parasites do not bite or sting humans or animals and are adaptable to many climates. Sprinkle fly parasites along fence lines in pastures, on manure piles, around wet areas, and anywhere else where manure or rotting vegetation can be found as these are the places that nuisance flies will lay their eggs. The fly parasites stay close to where you place them and work by killing flies in the maggot and pupa stages of the life cycle. Spalding Labs has a great reputation for effectiveness and customer service.

3. Feed Through Products

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In today’s market, there are more and more feed-through fly-control products available that you can give directly to the horse in their feed. These products contain insect growth regulators that help eliminate flies in manure by keeping fly eggs from hatching. While the regulator is bad for flies, it won’t harm your horse. For the most effective results, try putting all horses in the barn on a feed-through fly-control program. Just like fly parasites, feed through products work to help reduce fly reproduction but do not affect existing adult flies.

4. Fly Traps and Tapes

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If your property (outside of the barn) is also subjected to stubborn flies, consider using fly traps that lure flies into them. There are two types of traps – those that attract flies visually (best for biting stable flies) and those that attract flies by odor (best for house flies). Traps should be hung in outside locations that are not near your barn as you want to lure flies away from the barn and your horses. Hang the traps at least four feet above the ground and follow the manufacturer’s directions for placement. You may also want to move traps to different areas on your property to see where you’ll get the best results. To catch flies that have made their way inside your barn, consider hanging strips of fly tape from higher locations like ceilings in the aisle or rafters above stalls. The sticky tape will trap adult flies when they land and can help reduce the number of flies available for breeding.

5. Premise Sprays

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Premise sprays are a great tool for combatting adult flies inside the barn. They can offer a quick knockdown of flies and other insects that are already in the barn, while also help deter new ones from entering. Premise sprays can come in many different forms. For larger facilities and areas with heavy insect activity, you may want to consider installing a premise spray system. These systems use a reservoir and a system of tubing and misting heads to release a controlled amount of fly insecticide on regular intervals. Always make sure to follow the manufacturer’s instructions for installation and use. It’s important to keep in mind that the insecticide in premise spray systems may also kill any fly parasites you have released around your barn, so keep that in mind when you want to include multiple systems to help in your fly-fighting strategy.

If a full system is not for you, you can also apply a premise spray to targeted areas of your barn to kill and repel flies. If you currently use Absorbine® fly protection products in your barn, their UltraShield® EX and UltraShield® Red do double-duty as premise sprays.

When using a premise spray, you’ll want to concentrate around the outside of doors and windows to discourage insects from coming inside. Essentially, you’re hanging out the “no flies welcome” mat for your barn. If you notice an area where flies seem to gather, spray those areas as well to discourage flies from settling there. Many sprays will also kill on contact helping you eliminate adult flies where you find them.

6. Fly Sprays

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One of the quickest and easiest ways to combat adult flies and provide fast-acting protection for your horse is by having one of our favorite stable staples on hand, fly sprays. Applying fly spray to your horse before you ride or work them can also help your horse focus more on you, instead of being distracted by swarming insects and painful fly bites. To shop Corro’s full fly spray assortment, click here. If you use a high-quality fly spray, you won’t have to be re-applying it as often. Absorbine’s UltraShield® Fly Spray has been trusted by riders and their horses for decades because of the results they get. Their UltraShield® EX  and UltraShield® Red fly sprays offer quick knockdown and repellency of flies. Additionally, their UltraShield® Green offers a fly spray formula using natural ingredients called, and they have a  sweat resistant option, UltraShield® Sport. Choose the option that best fits your specific situation and pest species, then follow the instructions on the fly spray label for proper application. Applying the proper amount is crucial, as is covering every part of the horse’s body evenly. Be careful when applying fly spray as some horses may be afraid of the noise that the sprayer makes. Go slowly, starting down low on the legs, and allow the horse time to get used to the noise and sensation of being sprayed. Do not spray horses around the face as you do not want to get fly spray in their eyes. Instead, spray a cloth with fly spray and then carefully wipe it on your horse’s ears and on his face being careful to avoid the areas directly around their eyes.

7. Fly Mask and Sheets

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Dress for the occasion…there are a great variety of products available for horses to wear for turn out or while in their stalls. A great option for providing protection from flies for your horse’s face and ears is by using a fly mask. There are a variety of options for ear coverage, no ear coverage, and ones that that extend further down a horse’s nose. In addition to fly masks, fly sheets and leg wraps are also available and provide a physical barrier from flies on your horse. Fly masks, sheets, and leg wraps should be regularly checked to make sure that they fit correctly (not causing any rubs or soreness) on your horse and are in good condition (not fraying or having areas that might get caught on objects such as stalls and fences). Check the labels on these items and consider washing them on a regular basis to keep them clean and free of dirt and debris as well.

8. Fans

Fly protection should be a breeze! Where possible, ceiling and portable fans are a great way to deter flies inside your barn. The air circulation makes it difficult for the flies to make their way around the barn. A fan angled to blow air over your horse will make it even harder for flies to land on your horse. It is essential that you use fans and power cords that are specifically designed for agricultural use to reduce the risk of fire. Trust us, it’s worth the extra precaution.

9. Housekeeping

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You know the phrase, “so clean, you can eat off the floor?” It’s worth keeping that in mind when it comes to your barn as well! Dropped grain around the feed tub, uneaten supplements and medications, as well as other piles of dirt around the stalls can attract flies inside your barn as they look for an easy meal. Empty and scrub feed tubs regularly to remove any material left behind by your horse. The same should be done with water buckets, especially for horses that like to dunk their hay or drop grain into their water buckets.

Flies LOVE garbage, so also make sure your garbage cans inside and around your barn have tight fitting lids to prevent flies from accessing the trash as a food source. Regularly remove garbage from inside of the barn, especially any garbage that contains food, and scrub and disinfect garbage cans periodically to remove any stuck-on residue.


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