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Moth / Drain Fly / Sewage Fly

Danger

Due to the environment in which these flies breed in, they could potentially be a vector of certain bacteria and micro-organisms however there is currently no evidence of actual transmission to humans. There has been cases documented where inhalation of their body parts can cause bronchial asthma.

 

Did you know?

The common name "Moth flies" is due to their fuzzy appearance and resemblance to moths as their bodies and wings are very hairy. Larvae are aquatic and breath through a stalk-like siphon tube at the end of the body.

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Their body and wings are densely covered with hairs giving them a moth-like appearance.  Wings are oval-shaped with pointed tips and roof-like over body at rest.  Veins on wings are parallel.  Adults are 01/16 - 013/64 inches long, yellowish, brownish-gray or blackish. Larvae are  05/32- 025/64 inches long and have dark, hardened patches on the back of each segment.

In homes, the adults may be found on the walls of basements, kitchens or bathrooms. 

In commercial facilities, these flies are common to see in sewage and kitchen drains, dirty garbage containers, decaying organic material (i.e. rotten vegetation).

Larvae are aquatic and will feed on fungi, algae, sludge, bacteria and other microorganisms found in decaying organic material.

A female fly will lay 30-100 eggs in the gelatinous organic material that covers filter stones in sewage treatment plants, drain lines, dirty garbage containers and/or septic tanks.  The larvae and pupae will live within this jelly like film with their breathing tube projecting through the film / organic matter. The complete life cycle (egg to adult) can take anywhere from 7 to 28 days depending on conditions.  Adults will live for approximately 2 weeks.

Are Moth Flies hazardous to humans?

No, these flies do not bite and have not been found to transmit any disease pathogens in humans however there has been cases documented where inhalation of their body parts can cause bronchial asthma.

What causes a Moth Fly Infestation?

Moth flies can become a nuisance in structures when they breed in the liquids found in drains, septic tanks, and dirty garbage containers.

How do I eliminate Moth Fly infestation?

Pesticides are not recommended and generally will not be effective in eliminating this pest. The source of infestation must be found and eliminated in order to achieve control / elimination.

 
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