How do you kill and control Sphaerocerid Flies?

I don't know if I am certain with my identification, nor how to properly describe them... They are small and black and can be smaller than a an ant at youth, and once they've matured somewhat similar in size to a fruit fly with a slightly broader body. The adolescents I'd say have very thin and wings that are longer in proportion to their bodies than the adults, which have a fuller body and stocky wings looking almost like a moth flies... All else I can try to explain of them is when you crush the adults you can see that their tails sort of curve downward, being thicker at the end... Searching online the Sphaerocerid is the only thing I saw that resembled my flies.





They have been here now for the past three months, where we'd be initially seeing anywhere from 3 to 8 a day, on good days none at all. Searching constantly for their source, and keeping all surfaces clean, we finally found where they were coming from about two weeks ago... Our sink had been leaking for the last six months and we alerted our landlord at the onset and recently realized that it had been leaking down below as well, rotting out the floorboards... So our landlord has just replaced our sink a week or so ago and during the installation our house just filled with them! Discovering they were living under the sink, we have since removed everything from beneath it and allowed it to dry out but their numbers have just multiplied! We're now seeing 15 to 30 flies daily since then and he does not plan to replace the boards anytime soon and we have no way to get beneath them to try to clean them out and no desire to spray chemicals. Everything that I have read of these and similar flies says to remove all organic, damp and rotting materials, but we can't get beneath the darn tile...





Does anyone know a way in which these flies or whatever else they may be that can naturally kill them at the source by spraying or something or any traps that we can set to catch them?





Thank you so much for any answers you can provide...How do you kill and control Sphaerocerid Flies?
These small flies have dark colored bodies and are about 1/8 inch in length, making proper identification difficult without magnification. The tarsi (last 5 segments of the hind leg) is the key to identifying the Sphaerocerid fly. On this particular fly, the first segment of the tarsi is greatly enlarged.


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hen searching for Sphaerocerid fly breeding sources, remember that the larva can only survive in decaying organic matter that is moist. The first obvious place to check is where any fruits or vegetables or stored outside of refrigerators or coolers. Other areas to inspect would be dumpsters, recycling bins, seldom used (or cleaned) garbage cans, underneath and behind large appliances. Do not overlook drains where small flies are often found breeding in the super thin layer or film of debris that naturally accumulates in pipes, traps and drains.





In commercial and residential structures, tiny amounts of organic debris are often found where the legs or feet of appliances, tables or cabinets touch the floor. These tiny spaces can harbor thousands of fly larvae. All small cracks and crevices at floor level need to be inspected and thoroughly cleaned. Floor and sink drains can then be treated with Drain Gel (formally called Fly Gel).





Once one source has been located, continue with your inspection. Sphaerocerid flies easily follow air currents and usually have several breeding places in any structure. Do not assume that all of your breeding sources are indoors; Sphaerocerid flies will wander in from nearby dumpsters, outdoor garbage cans or even damp compost piles where fruits and vegetables are disposed.





As in any Small Fly elimination program, identifying and eliminating all possible breeding sites is the key to success.





In a few isolated cases (where moisture was an on-going problem) Talstar liquid concentrate has been used to spray the soil in crawl spaces beneath older buildings. Talstar gave immediate and long term (2 months) control in killing flies and fly larvae.


Talstar products cannot be shipped to MA, NY, NJ, CT, VT, HI, CA, AK





Cynoff, Demon or Cypermethrin 4 Ounce are alternative products for various states.





Although there are several sprays and traps used to kill flies in a home, restaurant or other structure, the infestation cannot be eliminated without eliminating their source. A space spray (Pyrethrin spray) can be used as a quick kill, reducing populations of flying insects. Pyrethrin spray is also a crack and crevice tool that is used to spray the tiny areas where flies breed. To monitor the area, use a Gold Stick trap. These traps use a fly sex lure to attract flies to their doom. Every Sphaerocerid fly caught is one less breeding adult! If you locate a drain that is a breeding ground for small flies, use Drain Gel (formally called Fly Gel) to destroy the film in which the fly eggs and larvae are developing. A surface spray is not recommended in this situation, unless there are great numbers of flies resting on the surface of trash cans, dumpsters or exterior walls. Fruit Fly Traps are also an excellent tool for capturing small flies. Attach the trap to the inside lid of garbage cans, dumpsters or compost bins to capture adult flies before they breed. Dispose of traps when full of flies or after 3 months. Click here to see fly elimination products.





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