 However, although they are responsible for the contamination of food and other types of damage, they do not transmit disease.Earwigs, house centipedes, and spiders such as the spitting spider "Scytodes thoracica" are known to be predators of silverfish.The essential oil of the Japanese cedar "Cryptomeria japonica" has been investigated as a repellent and insecticide against "L. saccharina", with promising results