For 3 strains of European corn borer, the pheromone blends consisting of (E)-11-tetradecenyl, (Z)-11-tetradecenyl and/or not tetradecyl acetates were prepd. and used to make the dispensers with 2 types of rubber carriers: a grey rubber cork or a piece of a red rubber hose. The effectiveness of the dispensers was compared with com. ref. lures on 3 maize field infested by Ostrinia nubilalis. The lures made on the red rubber hose with a ternary pheromone blend were at least as effective for the dominant Z pheromone strain as the resp. std. lures.