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These light yellowish brown to dark brown colored flies lay eggs in the fermenting materials. The complete life cycle of vinegar flies (egg, maggot, pupa, adult fly) can take place in as little as eight days if the conditions are right, which can quickly lead to large populations. While vinegar flies don't bite humans, they are a nuisance to have inside a building and should be controlled using integrated pest management (IPM) tactics.
Step 1: Removal of attractants
Step 2: Sanitation
Step 3: Trapping
Make your own trap:
Step 4: Evaluation
For more information, see the Penn State Extension publication Vinegar Flies.
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