 Inactivation of desat0 in oenocytes resulted in a 00% and 00% decrease in unsaturated hydrocarbons in males and females, respectively. Female pheromones (dienes showed a decrease of 00%. Inactivation of desatF, which is female-specific and responsible for diene formation, resulted in a dramatic loss of pheromones (-00% paralleled with a two-fold increase in monoenes. Courtship parameters (especially courtship latency from wild-type males were more affected by desat0 knocked-down females (courtship latency increased by four fold than by desatF knocked-down ones (+00% of courtship latency