“…A major part of the peripheral coding system for the two principal pheromone components resides in neurons responding to both of these components. This condition contrasts with previous studies stating that insect pheromone receptor neurons are highly specific in their response spectrum (Van der Pers and T. Takanashi and others Den Otter, 1978;Liljefors et al, 1987;Akers and O'Connell, 1991;Hansson et al, 1995;Mustaparta, 1997;Wojtasek et al, 1998;Kalinová et al, 2001;Larsson et al, 2002). This has been demonstrated in the closely related European corn borer, O. nubilalis Hansson et al, 1994;Cossé et al, 1995).…”