Abstract: Trichogramma ostriniae Pang et Chen is the dominant egg parasitoid wasp of Asian corn borer (ACB), Ostrinia furnacalis (Guenée). Olfactory response of T. ostriniae to kairomones emitting from the different stages of ACB female adults, their accessory glands and eggs were measured by using a four-arm olfactometer in the laboratory. The results indicated that airborne chemicals from egg masses, (E)-12-tetradecenyl acetate(E12.14: Ac, a component of ACB sex pheromone), matedfemales before their first oviposition and their accessory glands stimulated an intensive search behavior by T. ostriniae females; however, volatiles from virgin females or females after their first oviposition and their accessory glands did not elicit the parasitoid's movement.

Key words: Trichogramma ostriniae, Ostrinia furnacalis, kairomones, olfactory response