(E)-11-Tetradecenal is a critical sex pheromone component secreted by female Lepidoptera insects (e.g., codling moth Cydia pomonella and oriental fruit moth Grapholita molesta), attracting males for mating. In integrated pest management, synthetic analogs blended with cis-isomers (e.g., Z8-12:Ac) form targeted lures for monitoring orchard pests. For instance, in pear orchards, traps containing this component increased captures of G. molesta by 40%, reducing pesticide usage by 30% compared to conventional methods, enabling precise ecological control.