About drain flies
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Drain flies are found primarily in rooms or areas where there are drains - kitchens, bathrooms, and basements near floor drains, etc.
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Drain flies are small, 1/16 to 1/4 inch long, delicate, and fuzzy. They are pale brownish-gray to black. The larvae live in the gelatinous film or slime in drains and traps. They feed on algae, bacteria, and fungi in the slime.
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They may also breed in areas of sewer leaks and back-ups, dirty garbage cans, saucers under potted plants, clogged storm drains, and in condensate pans under refrigerators and air conditioners.
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Adult flies may live up to 2 weeks and total development time from egg to adult may take 7 to 28 days.
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Flies emerge daily once an infestation is underway.
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Fungus gnats can also breed in drains.
Management
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Clean traps and drains mechanically or with an over-the-counter drain cleaner followed by hot water. Clean or eliminate breeding sites.
Rev. 2020