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How To Control Blow Flies

Blow flies, also known as bottle flies, are larger flies known for their metallic bluish green color. These flies create a very audible buzzing sound while flying and typically scavenge around rotting meat or strong odorous foods. They tend to be around urban areas and aren’t typically found indoors. When they are indoors, this could be a big problem as they may breed and lay eggs which would cause a considerable infestation.

Blow flies can be found all over the world and emerge in nearly any area that is occupied by humans. Blow flies get the “blow” from their name from infesting rotted carcasses of dead animals during their larvae/maggot stage when the carcass is in a bloated condition. Blow flies lay hundreds of eggs on rotting flesh which will grow into larvae and eat the flesh until there is nothing left.

Blow flies commonly gather around dead animals and are also often found near meat processing plants, garbage dumps and slaughterhouses. They typically enter homes when they detect filth or food indoors and will come from near and from far to feast, usually through any gaps and openings around the home. Most people who deal with blow flies usually have a rodent problem.

If you have a blow fly problem around your home, there is a way to eliminate them completely and Solutions Pest and Lawn has the products and techniques you can implement to be fly-free.

It’s that simple! Browse our recommended blow fly control products below. If you have any questions or concerns regarding making an order or would like live DIY advice from trained pest control experts, give us a call, shoot us an email or live chat with us online. We’ll be happy to assist you.

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How To Get Rid of Blow Flies: 4 Step SolutionBlowfly Appearance

Blow fly control can be rather easy to execute if you have the right approach and the right products to keep them away. Solutions Pest and Lawn recommends using a variety of treatment methods and techniques to kill the flies. Here we will share with you four basic steps you can put in place to ensure your home will not be plagued by the presence of flies any longer.

Step 1: Identification.  Are you absolutely sure you are dealing with blow flies and not some other type of fly. There's no universal control method for all fly species as different types of flies have different habits and tendencies and thus will require specific products to control them. To correctly ID the fly you are encountering as a blow fly, observe their appearance.

It can be quite easy to differentiate a blow fly from another species of fly because blow flies are usually much larger than your average house fly and also because they have that distinct metallic greenish blue body which is a dead giveaway that they are a blow fly. However if you want to be 100% percent  sure you have a blow fly problem, go ahead and send us an image of the fly at identification@solutionsstores.com and we will promptly reply back to you with the proper ID of the fly and what control methods and products work best against it.

Step 2: Inspection
The most important step to rid these pesky flies is to eliminate the breeding source within the home and conduct good sanitation practices in your home to eliminate the filth that the flies are attracted to and are gravitating towards. This usually may be garbage that hasn’t been thrown away, rotting fruit or vegetables, a dead rotting animal laid out or any other organic matter. By simply tossing the offending item and doing a thorough cleanup, you will have already fought half the battle as the infestation will simply leave.

Step 3:Control.
Indoor fly control can be managed with a combination of fly lights (like Mantis Fly Lights), glue traps such as a Musca-Stik, and fly baits. You can also use a general aerosol insecticide spray or fogger spray like
Pyrid Aerosol or Flex 10-10. Spray around the source or where the source was after you disposed of it to control the blow flies. These sprays kill flies on contact and are a good choice if there’s a lot of fly activity in your home and you want to remove them quickly. If you do use a spray or fogger, you may be required to vacate the home after treatment and ventilate the area before reentering.  What you choose depends on your personal preference as there are a lot of solid options available which work well. You can, of course, contact us for more detailed advice.

Step 4:
Prevention. Once the flies have been eliminated we recommend implementing exclusion measures to make it harder for flies to re-enter your home. This includes doing this like: regular cleanups of your home, tossing trash in tight fitting containers with lid, replacing your garbage bags regularly and not letting trash pile up, sealing gaps and holes and any other points of entry into the home with caulk. Be sure that if you have pets to remove waste in the yard to prevent future fly infestation.


Learn More About Blow Flies

Blow flies are a major health hazard to humans and are essentially a pure filth fly. Wherever there is death and decay, blow flies are sure to be there and because of that, they are notorious for spreading disease and illness wherever they are found. This is not a type of fly you want in your home because you have no idea what unsanitary muck they have came from.


Blow flies breed and fill their bellies mainly off of the dead rotting carcasses of animals and small rodents. When they are unable to locate a dead animal corpse to lay their eggs, the next best thing for them is manure or animal feces so that alone should signal to you that you don’t want this fly buzzing around in your home.


blow fly on pole

Blow Fly Appearance

Blow flies are known by other names such as bottle flies and are quite distinctive compared to other fly species. The colors they most commonly come in are a metallic shade of green, blue or bronze. They are also larger than the typical house fly, ranging between 10-14 mm long. Blow flies also have wider bodies compared to other flies.


Blow Fly Behavior and Habits

What is surprising to most people is that blow flies actually bring benefit to the ecosystem and even in forensics. Because of the blow flies affinity for consuming carrion (dead animals), it speeds up the decomposition process. In forensics, blow flies are a useful assistant in being able to tell the time and date of a person’s death.


Blow flies are mostly found around dead animals such as birds and rodents. However, they enjoy practically any type of decaying organic matter. For instance, blow flies like to lay eggs in the open wounds of dead livestock and other animals. Blow flies are also commonly found around manure and will flock in large numbers on manure to lay eggs and breed.


Blow flies do this because the larvae of blow flies like to feed on the dead remains or fecal matter they were laid in as eggs and helps them in their transition into adulthood. Blow fly larvae require a significant amount of protein to develop and hence this is why dead rotting meat is such a popular breeding ground. It takes around 3 weeks to a month for blow fly larvae to grow into an adult.


blow flyHow Blow Flies Invade Homes

As we have covered, blow flies are mostly attracted to dead carcasses, filth and animal feces. As a result, if your home encounters an unsanitary issue such as a pet leaving droppings outside or trash that has piled up and hasn’t been taken out, blow flies will soon become a problem in your future.


Blow fly infestations normally begin when you notice a small number of blow flies flying around an area where there is decaying organic matter in the home. Soon enough this small number can become a great big infestation meaning that the source that is attracting the blow flies is becoming a prime breeding ground where blow flies will come from afar to feed.


Blow flies are small enough to fit through small cracks and holes in the home to get to the decaying source that is luring them. It doesn’t even really matter what time of the year it is, blow flies are pretty much active all year round.


For instance, in the winter time, blow flies can still be rampant as long as there is a food source or breeding source available. Some of the typical items they flock to during the cold season is road kill or dead rodents found in homes which can be quite common usually due to rodents dying somewhere or around the house from a rodenticide.


Rodents often die in spaces where they aren’t able to disposed of easily such as in an attic or a wall void or vent. The odor of the rotting rodent will be sensed from afar by blow flies who will then travel in droves to go feed and breed on the carcass.


Best Methods Of Getting Rid of Blow Flies

The most effective ways to treat a blow fly infestation depends on a number of different factors. There will be a need to determine where you are seeing the blow flies being active and what the source is that is attracting them.


What can eliminate a minor blow fly problem is locating and discarding the rotting source that is attracting them. Once the source is removed, the majority if not all of the blow flies will leave the area. For stragglers that don’t leave there are sprays and traps that can be used to kill them.


For a more serious infestation, baiting or trapping may be the best method to capture or kill blow flies that are sticking around combined with sanitation and breeding source removal.


DIY aerosol spraying for blow fliesBest Spray For Killing Indoor Blow Flies

For blow flies which are found flying around indoors, you can kill them or draw them out with a product like CB PCO Insect Fogger.  This is a fogging spray so it’s obligatory to set the fogger and leave the house for a period of time to let the spray dissipate and then letting the home air out once it’s safe to return.


One can is enough to treat the average 5000 sq/ft structure 3-5 times so plan on using a can a week.


Best Spray For Killing Outdoor Blow Flies

To eliminate blow flies from your yard, barn, garbage area or other outdoor area, spraying Reclaim IT can do an excellent job in keeping those lingering blow flies away. will both kill and keep them away.


Reclaim IT is odorless, mixes easily with water and can be applied with any standard sprayer.


Baiting BlowfliesBaiting Blow Flies

Another liquid spray method of addressing blow flies is via baiting. We highly recommend using Maxforce Flyspot Fly Bait. This bait utilizes a strong pheromone which blow flies will not be able to resist.


Maxforce is a non repellent spray that will kill blow flies within seconds of them lying on a surface that has been treated.  


Effective Blow Fly Traps

Musca-Stik traps are another effective control method of blow flies. Much like the bait product we shared above, Musca-Stik uses powerful pheromones which will lure blow flies right to the sticky trap where they will have no way to escape.


Alternatively you can use a light trap such as the Mantis 1X2 Flying Insect Light Trap (220v) to use fluorescent light to lure unsuspecting blow flies to their end via the glue trap that is a part of the light trap.


Preventing Blowflies From Returning

To prevent blow flies from making a return to your home after treating your home and eliminating the filth source which attracted them in the first place you will need to establish a regular sanitation routine.


Take your trash out regularly and clean out your garbage cans with hot water and bleach from time to time. Also clean your kitchen floors and surfaces well.


For any pets or animals you have, make sure to clean up their droppings quickly as they blow flies will come back before long.

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