The aim of our study was the synthesis of the active components of the apple worm, Cydia pomonella L. - E8, E10-dodecenol and the grape moth, Lobesia botrana S. - E7, Z9-dodecadienol and their minor components E-8-dodecenol and E-9 -dodecenyl acetate. Different amounts of components were impregnated in each rubber dispenser. Pheromone traps was given to be tested in field monitoring trials to determine the most effective optimal pheromone blend ratio in the geographical and climatic conditions of the Republic of Moldova.

In this paper is reported the evaluation of biological efficacy of two minor components that was added to the basic sex pheromone component Cydia pomonella L., E8, E10-C12-OH. The use of minor component- C.M.-1 of increasing concentrations in binary mixture compositions with the basic sex phe-romone component of codling moth on pheromone-impregnated rubber septa in delta pheromone traps has shown an increased effectiveness by 56-62% in field trials on apple orchard. At the same time, the number of males caught in delta pheromone traps where were used minor component - C.M.-2 in binary mixture compositions increased by 29-35%. Auxiliary research is still needed.

The scope of the research was to determine the biological efficiency of the multicomponent blend of Orienthal fruit moth sex pheromone in the apple orchard. The introduction of the minor component M1 in doses of 10% to the basic components on dispensers had led to a increase in number of males caught in sex pheromone traps by 1,7 times. While the male captures on traps where was added 10% of minor component M2 to the basic ones had led to a increase by 1,2 times. The minor component M2 in-crease of doses had led to a proportional decrease of the male caught in traps. Research will be continued.