How to Choose the Right Fly Control Products for Livestock Facilities
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Time to read 8 min
Choosing the right fly control product for a livestock facility starts with identifying the fly, locating where it is breeding, and determining whether the problem is primarily on the animal, around the facility, or both. Once you understand those factors, it becomes much easier to narrow down the appropriate type of fly control product.
Walk into a farm store or browse a fly control category and you’ll find sprays, baits, traps, larvicides, and other control options. Each serves a different purpose, and choosing the wrong type can leave the underlying problem unresolved.
There’s no single fly control product that works for every operation. A product designed for adult flies around a barn may not address flies that spend most of their time on livestock, while a product intended to target developing flies won’t provide the same immediate control as a product designed to kill existing adult flies. The right choice depends on the fly species, where the flies are found, and what you’re trying to accomplish with your control program.
Why One Fly Control Product Doesn’t Work for Every Operation
Fly problems can vary considerably between livestock operations. A dairy barn with manure accumulation may have a different fly population than a pasture-based cattle operation, while poultry houses, swine facilities, and horse barns can have their own sources of fly activity. The type of fly, where it is found, and where it breeds all affect which control method makes sense. In some situations, more than one control method may be appropriate.
Know Your Fly Before You Buy
The type of fly you’re dealing with matters when choosing a control product. Different flies behave differently and may require different control approaches.
- House flies are commonly found around barns, feed areas, and manure. They don’t bite and can breed in manure, wet feed, and other organic material.
- Stable flies are biting flies often found around livestock and bedding areas. They can breed in wet bedding and other decaying organic material.
- Horn flies spend most of their time on cattle rather than around buildings. That makes their control different from flies that are mainly found in barns or other facility areas.
- Face flies are commonly found around the face and eyes of cattle. Like horn flies, they are primarily associated with the animal rather than the facility.
Identifying the fly and where it is concentrated gives you a better starting point for choosing the appropriate product category.
Find the Breeding Source First
Once you’ve identified the fly, look for areas where moisture and organic material may support breeding, such as:
- Manure, especially in corners and under equipment
- Wet or soiled bedding
- Spilled or wet feed
- Leaking waterers and poorly drained areas
- Old hay, bedding, or other decaying material
Cleaning up these areas won’t solve every fly problem, but it can reduce breeding sites and help you determine what type of control product you may need.
What Types of Fly Control Products Are Available?
Once you know what type of fly you’re dealing with and where the problem is occurring, you can start comparing the available control options.
Sprays for Adult Fly Control
Fly sprays designed for adult fly control are intended to control existing adult flies in approved treatment areas. They can be useful when adult flies are the immediate problem, but they don’t address every stage of the fly life cycle.
For facilities that use automatic dispensing systems, Prozap® LD-44T™ Metered Fly Spray Refill is designed for use in metered spray units and is labeled for controlling flies, mosquitoes, gnats, and moths in areas including farm buildings, dairies, and barns.
Fly Baits
Fly baits attract adult flies and are generally placed in targeted areas where flies congregate. Placement is important, and products should always be used according to the label.
Starbar QuikStrike Fly Scatter Bait fits this approach when targeted baiting is appropriate for the facility and target pest.
Fly Traps
Fly traps capture adult flies without applying an insecticide. They can be useful for monitoring fly activity or as part of a broader control program, but they don’t address breeding areas.
Starbar® Fly Trap Attractant is designed for use with reusable fly traps and attracts filth-breeding flies without insecticide.
Larvicides
Larvicides are designed to target developing fly stages in suitable breeding areas, such as manure or other organic material. They are intended to address flies before they reach the adult stage rather than provide immediate control of existing adult flies.
Insect Growth Regulators
Insect growth regulators (IGRs) interfere with insect development rather than providing the same type of immediate adult fly control as many products designed to kill existing flies. They may be useful when developing flies are part of the problem, depending on the product and its labeled use.
The right option depends on the fly, where it is found, the life stage being targeted, and what you need the product to accomplish.
Residual vs. Contact Treatments
When comparing fly sprays, you may also come across the terms residual and contact.
A contact treatment is intended to act on flies it directly contacts during application. A residual treatment is designed to remain active on an approved treated surface for some time after application.
Country Vet CV-80D Fly Spray can be considered when its label matches the intended treatment area and target pest.
Which type makes sense depends on the product, the treatment area, and what you’re trying to control. Always check the product label for approved uses, application directions, and any restrictions.
The application method matters too. For larger livestock buildings or other areas where a fogging application is appropriate, equipment such as the Hurricane™ Ultra II Fogger is designed to dispense compatible oil- and water-based insecticides and other treatment products. The fogger itself is application equipment, so the chemical being used must be appropriate for the intended application and used according to its own label.
Fly Control Product Comparison
Product Type |
Primary Target |
Where It’s Used |
Best Suited For |
Key Consideration |
Sprays for adult fly control |
Adult flies |
Approved treatment areas |
Rapid adult fly control |
Follow label directions |
Fly baits |
Adult flies |
Targeted areas |
Spot control |
Placement matters |
Fly traps |
Adult flies |
Fly concentration areas |
Monitoring and supplemental control |
Doesn’t address breeding |
Larvicides |
Developing flies/larvae |
Breeding areas |
Reducing future fly emergence |
Requires identifying breeding sites |
IGRs |
Developing stages |
Approved treatment areas |
Longer-term population management |
Product-specific directions |
Which Fly Control Product Should You Choose?
- Need control of adult flies? Start by determining whether the flies are primarily on livestock or around the facility. An appropriately labeled on-animal product may be suitable for flies associated with livestock, while a premise product may be appropriate for adult flies in approved facility areas. PROZAP® Fly-Die GPS is one option available for livestock fly control; always confirm the current product label for the target pest, animal, application site, and directions.
- Flies keep returning? This is often a sign that a control method is being used on its own rather than as part of a broader program. Pairing sanitation with the right product type, rather than switching products repeatedly, tends to produce better results.
- Flies are developing in breeding areas? A larvicide or IGR may be appropriate when labeled for the target pest and treatment site.
- Need to monitor fly activity? Fly traps can help identify areas with higher fly activity and monitor changes over time.
- Managing multiple buildings or a larger operation? More than one control method may be appropriate, depending on the fly species, facility, and sources of fly activity.
Choosing the Right Fly Control Approach
Choosing the right fly control approach starts with understanding the problem rather than choosing a product first. Identify the fly, determine where it is active and breeding, and decide whether you need to address adult flies, developing stages, or both.
From there, compare the product types that fit your situation, including sprays, baits, traps, larvicides, and IGRs. Keep sanitation and breeding-site management as part of your overall approach and always check the product label for the target pest, approved treatment area, application directions, and restrictions.
The goal isn't to find one product for every fly problem. It's to choose the control method that fits your livestock facility and the specific fly pressure you're dealing with. Once you've identified the right approach, browse our fly control products within Pest Control category to compare options for your facility.
Frequently Asked Questions
What type of fly control product is best for a livestock facility?
The best option depends on the fly species, where the flies are active, and whether you’re targeting adult flies or developing stages. Sprays, baits, traps, larvicides, and insect growth regulators serve different purposes, so identify the fly and treatment area before choosing a product.
What is the best way to control flies in a livestock barn?
Start by identifying the fly and checking for breeding areas such as manure, wet bedding, spilled feed, and other organic material. Sanitation can be combined with an appropriately labeled fly control product based on the pest, facility, and treatment area.
Is fly spray or fly bait better?
Neither is best for every situation. Fly sprays designed for adult fly control are intended for specific treatment areas and target pests, while baits are generally used in areas where adult flies congregate. The right choice depends on the product label, application method, and treatment area.
Why do flies keep coming back after spraying?
Continued fly activity may be related to untreated breeding areas, such as manure, wet bedding, or spilled feed. It can also indicate that the product or application method isn’t appropriate for the target pest or treatment area. Check the breeding source and product label before applying additional treatments.
What is the difference between adult fly control and larvicides?
Products designed for adult fly control target existing adult flies, while larvicides target developing flies in suitable breeding areas. Because they address different stages of the fly life cycle, the appropriate choice depends on the fly problem, treatment area, and product label.
When should you consider an insect growth regulator for fly control?
An insect growth regulator (IGR) may be considered when developing flies are part of the problem and the product is labeled for the target pest and treatment area. IGRs work differently from products intended primarily for adult-fly control, so check the label for specific directions.
Are fly traps effective in livestock facilities?
Fly traps can help monitor fly activity and may provide supplemental control where adult flies congregate. They do not address breeding areas, so traps are generally most useful as part of a broader fly-management program.
How do I choose a fly control product for my livestock facility?
Start by identifying the fly, where it is active, what life stage you’re trying to control, and where the product will be applied. Use those answers to narrow the product category, then check the label for the specific pest, application site, directions, and restrictions.
