These small (20mm) silvery grey , wingless insects are found throughout the U.K . They are nocturnal and forage in bathrooms and kitchens where they can become trapped in sinks, baths, glasses etc. as they cannot climb smooth surfaces. By day they hide in crevices, behind tiles, wallpaper, bath panels etc.

Biology

The white or brownish eggs are usually laid in crevices in foodstuffs or adjacent structures. The female lays up to 100 eggs in total, over a period of about 2 months. The first stage nymph , which is larger than the adult, lacks the silvery scales and the 3 tail bristles but the older nymphs resemble the mature insect more closely. Adulthood is reached after about the tenth moult and this can take up to a year depending on the ambient conditions

(temperature, humidity and food).

Importance

Silverfish are seldom more than a nuisance. They are capable of causing damage to paper and manuscripts where they often feed on protein rich gums and binding pastes. They may, if present in large enough numbers, damage fine textiles and even leather. In addition they sometimes invade packets of dried foods which have been stored in damp cupboards.

Control

If control of this generally harmless insect is required then the use of any residual insecticide is likely to prove effective. In addition any obvious cracks and crevices should be sealed.

The Council do not offer a service to deal with silverfish but please contact us if you require any advice