In this paper is presented the synthesis of the minor component (E)-9-Dodecen-1-ol of the codling moth, Cydia pomonella L. The synthesis scheme consists of 7 stages. Compositions with the main component and different doses of the minor component were impregnated on rubber dispenser. Pheromone traps was given to be tested in field monitoring trials to determine the biological effectiveness.  Codling moth (Cydia pomonella) is the serious insect pest of apple fruit in different parts of the world. A remarkable damage (80%) of the fruit has been observed due to the insect in temperate parts of all major continents [3]. While being an economically important pest of the apple worldwide, it requires some level of control. One of the control methods is monitoring with the help of pheromonal traps, which are used worldwide against the codling moth. The pheromone blend of the codling moth has been identified and codlemone (E,E)-8,10-dodecadi-en-1-ol; E8E10-12OH) was found as the major sex pheromone component. Minor pheromone compounds have been identified as well, some of which were found to enhance male antennal response: a saturated alcohol, dodecanol (12OH), two unsaturated alcohols: (E)-8-dodecenol (E8-12OH) and (E)-9-dodecenol (E9-12OH), codlemone aldehyde ((E,E)-8,10-dodecadienal; E8E10-12Ald), etc [2]. There are reported examples of pheromone blend differences among and within populations of a single species. The study of geographic variation in pheromone composition may be helpful to develop efficient trapping schemes for accurately monitoring this economically important pest [1].