Novel roles for the corpus allatum hormone in the cost of sexual interactions in the linden bug Pyrrhocoris apterus

► Sexual interactions reduce survival in both genders. ► Corpus allatum (CA) reduces survival in virgins of both genders. ► Survival cost of sexual interactions is not mediated by the insect's own CA (endogenous juvenile hormone). ► Male CA has only minor effect on female survival. ► Female CA is principally responsible for the sex-induced reduction of male survival.