Silverfish are small, primitive, wingless insects. The common name derives from the silvery light grey color, combined with the fish-like appearance of its movements. Their diet consists of carbohydrates such as sugar or starches. Typically seen in moist, humid areas in the home, such as bathrooms, basements and attics. They tend to hide their presence from humans which means any damage they have caused could go unnoticed as well.
Silverfish run very fast, and have flattened bodies. Their shape is often compared to a teardrop, carrot or fish, tapering from head to rear and generally covered in scales. They have thread like antennas and small compound eyes that are widely separated. Immature silverfish look similar to adults, except for size, and their scales appear with the third or fourth mold.
Keep an eye out for feeding marks, although they may be irregular whether they are holes, notches along an edge, or surface etchings. Yellow stains, scales and/or feces (tiny black pepper-like pellets) may also be seen on infested materials.
The key to silverfish control is thoroughly inspecting preferred habitat areas and where appropriate food materials are present. If the infestation is localized on the inside, one can assume that it is recent and was either brought in through infested items or represent a recent invasion from the outside. If the infestation is wide spread, then attention should be directed from the outside. Anything stored against or near the house’s exterior must be moved or removed because silverfish can easily climb up walls and find entrances around windows and door frames, utility pipes and vents. Shake roofs should also be cleaned and sealed every other year. Additional tips include getting a dehumidifier for your home, repair leaky pipes and drains, and eliminate or repair any moldy or wet wood.
Don’t keep old books and magazines in areas where silverfish are usually found like basements, attics and garages. Its also important to keep food items such as flour and sugar in tight containers. Silverfish cause no harm to people but can damage personal belongings made out of paper. They’re known to infest items such as wallpaper, books and envelopes so these items can become damaged over time. They can also feed on glue and clothing, as well as food items such as rolled oats and flour.
Silverfish are good climbers and can survive for weeks without food and water. They require a high humid environment to 70-90% and prefer room temperatures of 70-85 degrees. Silverfish are also nocturnal and prefer to hide or rest in tight cracks or crevices during the day. They can be found almost anywhere in a house. Females can lay 1-3 eggs per day, and development time is 3-4 months under favorable conditions with them living up to 3 years.
If you’re finding your home has become infested with silverfish it is always best to consult a professional.
