(11Z,13Z)-11,13-Hexadecadienal, identified as the primary sex pheromone component of the diamondback moth (Plutella xylostella) female, serves as the core constituent in pheromone lures targeting this pest; typically blended with a specific ratio of its (11Z,13E)-isomer (e.g., a 9:1 Z/E mixture) to create a highly effective attractant, capable of capturing 15-30 male moths per trap daily in the field. This lure demonstrates significantly enhanced monitoring precision, over 50% more efficient than light traps, and is widely employed for forecasting outbreaks and enabling eco-friendly control of this major cruciferous vegetable pest.