Tricarbonyl [(8,9,10,11-η-8,10-dodecadien-l-ol] iron and the corresponding acetate prepared from 8,10-dodecadien-1-ol or its acetate, comprise the protected double-bond system of the molecule. After coming in contact with ambient oxygen, the iron complexes in question slowly release the corresponding pheromones of, for example, the codling moth,Cydia pomonella, and the pea moth,Cydia nigricana in highE,E purity and amounts that are sufficient for pest monitoring. A simple dispenser for propheromone application is proposed. Results of release rates in laboratory conditions and field trials are given.

Institute of Organic Chemistry and Biochemistry Czechoslovak Academy of Sciences Flemingovo nám 2 166 10 Praha 6 Czechoslovakia

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