The sex pheromone components of diamondback moth, plutella xylostella, (Z) -11-hexadecenal and(Z)-11-hexadecenyl acetate, were synthesized from 1, 10-decandiol by alkyne route and from 10-undecenoic acid by wittig reaction with high yields. Attractant activity of mixtures of these Chemicals loaded on rubber septa was extensively tested using sticky traps and water traps in the cabbage field in 1982 and 1983 in Beijing suburbs and Su Zhou county, Jiang Su Province, The mixture of (Z)-11-hexadecenal and (Z)-1...