 In another species, PBAN release has been shown to be stimulated by external factors including photoperiod, temperature and odorants from host plants

The juvenile hormone (JH), released by the corpora allata (CA), is necessary for the production and release of the sex pheromone.The CA releases JH which acts on the production/release of the PBAN-like factor.So, PBAN is what connects the network in the CA to the central nervous system's production of sex pheromone.