Abstract:The sex attractant for Chinese locust moth(Cydia trasias Meyrick),(E,E )-8,10-dodecadien-1-ol,was synthesized via Crignard coupling reaction from two readily available starting materials containing C8 units(scheme 1).Field trials were undertaken in Chinese locust grove in Beijing during 1993-1994.The experiments showed that(E, E)-8.10-dodecadien-1-ol gave strong attractive activity to the male Chinese locust moths.The attractant-baitedtrap can be used to detect both the presence and the density of the moth in the field, which is very useful for monitoring population of the pest insect.