Traps baited with synthetic codling moth,Cydia pomonella(L.), sex pheromone, were positioned at two heights in apple trees, 1.6–2.0 m and 3.5 m, to determine if height significantly influenced trap catch. To eliminate intertrap competition between traps at different heights, the traps were placed alternately high for a week, then low for a week, over an eight week period. Our results showed that the position of the trap in relation of the tree canopy was critical. The trap must be inside the tree canopy. In the absence of intertrap competition between high and low traps, there were no significant differences between catches in traps positioned in the top of the tree or traps at head height. Traps for monitoring codling moth in pest management programs will provide the same information when located where it may be easily reached, as when in the top of the tree.