Small Flies

Many small flies are found in food prep areas and may carry disease causing organisms.
The five species listed below are the most common of the small fly.

fruit fly
Fruit Fly
phorid flies
Phorid Fly
Sphaerocerid Flies
Sphaerocerid Flies
fungus gnats
Fungus Gnats
drain fly
Moth Fly (Drain Fly)
cheese skipper
Cheese Skipper

Breeding Sites:

These small flies may be found breeding in the moist organic matter, such places as soil contaminated with sewage or drains, decaying fruit or vegetables, and garbage. Sphaerocerid flies are also located in manure; cheese skippers breed in meat, cheese and animal cadavers; and fungus gnats can feed on fungus growing in wet soil.

Where To Inspect (Tips)

  • Moist organic matter
  • Decaying plant/vegetable/fruit matter
  • Dumpsters, compactors, trash cans
  • Where equipment legs meet the floor/li>
  • Discarded fruit cans or soda cans and recycle bins
  • Drains
  • Elevator pits
  • Under refrigerators in condensation pan
  • Terrariums, soil in potted plants-particulary for the small fly called a fungus gnat Please read more on fungus gnats from this link in order to obtain better control.
  • Mop buckets, mops
  • Cadavers
  • Grease or food trapped in cracks of equipment
  • Leaks in or around cabinets that cause wood to stay moist.
  • Wet insulation in walls and ceilings.

Small Fly Control

  • Removing all breeding sites is the best method for eliminating a small fly infestation.
  • Unfortunately, bleach and hot water will not eliminate breeding sites in drains for the drain fly. Drains need to be treated with an industrial- strength drain cleaner such as Invade Bio Drain Treatment. It may be used to break up the organic debris.
  • Dry the soil out. Placing a 2" layer of sand over the dried soil will help prevent future breeding areas in the soil.
  • Remove sewage infested soil and replace with new soil if you have a Phorid Fly problem.
  • Clean and caulk cracks between floor and equipment. Remember to dry out moist areas because larvae need a moist area to survive.
  • Store meats and cheese between 30-36 degrees F. Cheese Skippers can't infest properly stored meat and cheese.
  • After removal of breeding sites, a non-residual pryethrin spray space spray CB 80 or Country Vet DV-80 D can be used as a quick kill, reducing populations of flying insects. Fogging material(pyrethrins) and professional fogger equipment:
    Fogging Equipment and Fogging Material
  • Fly Light Traps can also be used to attract fruit flies, phorid flies(males only), moth flies, and fungus gnats.