Sewage Flies (Drain Flies)

Sewage Flies (Drain Flies)

Identyfication

Size

From 2mm to 5mm 

Colour

Grey, or black

Habitat:

Moist areas near sewage systems, drains, and other moist areas

Importance:

Potential disease transmission and nuisance.

Control:

Knockdown sprays are very effective.Control is restricted to targeted application of pyrethrins or synthetic pyrethroid sprays or surface treatment of permethrin.

Sewage Flies (Drain Flies) Identification

Sewage Flies, also known as Drain Flies, are small flies from the family Psychodidae and from the order Diptera. They are typically dark grey to black in colour and measure between 0.2mm and 5 mm in size. They are easily identified by their light-coloured wings which are usually folded in a roof-like shape over their bodies. They also have very long legs and antennae in comparison to their body size. 

These flies are found near sewage systems, drains, and other moist areas. They are most commonly found in bathrooms, kitchens, and basements. They feed on organic matter such as bacteria, fungi, and decaying vegetation. They breed in moist, dark areas and can lay up to 100 eggs at a time. The eggs are about 0.2mm long, white and oval and the egg development takes one to sex days. The larvae go through three moulds before pupating. It can mature in as little as 10 days in 25C and 50 days in 7C. Adults can live up to a month.

Because of their unsanitary habitat and diet, sewage flies can be a nuisance to humans. They can easily spread germs and bacteria to food and surfaces. They can also cause allergic reactions in some people and even asthma attacks. To prevent an infestation, it is important to keep areas around sewage systems and drains clean and dry.

Habitat, Behaviour, Lifecycle

Habitat:

Sewage flies are found near sewage systems, drains, and other moist areas. They are most commonly found in bathrooms, kitchens, and basements. They thrive in warm, damp, dark environments and prefer temperatures between 20 to 25°C. 

Behaviour:

Sewage flies feed on organic matter such as bacteria, fungi, and decaying vegetation. They are attracted to light and will fly around lamps and windows. They are also active during the daytime, with peak activity occurring in the early morning and late evening.

Lifecycle:

Sewage flies have a complete metamorphosis, meaning they go through four stages in their lifecycle: egg, larva, pupa, and adult. The female lays up to 100 eggs at a time, which are about 0.2mm long, white and oval. The egg development takes one to six days. The larvae go through three moulds before pupating. It can mature in as little as 10 days in 25C and 50 days in 7C. Adults can live up to a month. The entire lifecycle can take anywhere from 10 days to two months, depending on the temperature. 

To prevent an infestation, it is important to keep areas around sewage systems and drains clean and dry. Regularly check for any signs of an infestation and take the necessary steps to eradicate them.

Why do I have drain flies

Drain flies, also known as moth flies or sewer flies, are an annoying and potentially hazardous problem in many homes. These flies are typically found in moist, damp places and can be difficult to eradicate. The most common reason for having drain flies is improper drainage. Poorly maintained plumbing or plumbing that is clogged or blocked can cause water to back up and create a breeding ground for these pests. In addition, drains that are slow to drain or that have been left open can create an ideal environment for these flies to lay their eggs and breed.

Another common reason for having drain flies is the presence of organic debris in drains. Organic debris such as food particles, soap scum, and hair can provide the perfect environment for these flies to thrive. When organic debris accumulates in drains, it creates a moist, dark environment where the flies lay their eggs and reproduce.

Finally, inadequate cleaning of drains can also contribute to the presence of drain flies. Without regular cleaning, organic debris can accumulate and create an ideal breeding ground for these pests. Regularly cleaning drains with a drain cleaner or bleach solution can help reduce and eliminate the presence of drain flies.

In conclusion, there are several common causes of drain flies. Improper drainage, organic debris in drains, and inadequate cleaning of drains can all contribute to the presence of these pests in a home. To prevent and eliminate drain flies, it is important to maintain proper drainage, clean drains regularly, and remove any organic debris that might be present. Taking these steps can help to prevent a drain fly infestation and keep your home free from these pests.

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