Endogenously Produced Repellent from American Cockroach (Blattaria: Blattidae): Function in Death Recognition

Ethanol extracts from the bodies of male or female American cockroaches, Periplaneta americana (L.), repel conspecifics of all ages and sexes from shelters during the photophase. Full repellency is obtained above a dosage of 1.6 cockroach equivalents per shelter. The repellent is endogenously produced, is distributed throughout the bodies of individuals of both sexes, and is effective against at least four other species of cockroaches of …