Moth flies are one of the most common flies found in floor drains. Since the adults are poor fliers and are active at night, they are usually found resting during the day near the source of an infestation. They will breed in anything that collects moist organic material and are often found under leaking shower pans, in basement or crawlspace sump pits and in elevator pits. Structural or pipe leaks may also cause moth fly infestations.
The best way to manage moth flies is to remove or treat their breeding sites. The organic buildup on the inside of drain pipes can be scrubbed away and prevented by applying a microbial cleaner regularly. Or treat breeding sites with a boric acid dust to convert the organic buildup into a bait the larvae will eat. Another option is to apply a water-resistant dust that stays effective in wet and damp places.
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Check out our Introduction to Small & Large Filth Flies ProTraining course:
Small flies and large filth flies are public health pests that are often difficult to manage. After completing the course, you should be able to understand the basic fly life cycle, identify major small and large filth fly pests, recognize their importance in public health and recommend the appropriate fly management methods (including finding maggots).
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