INVESTIGATION OF SEX-PHEROMONE COMPONENTS OF FEMALE ASIAN CORN-BORER, OSTRINIA-FURNACALIS (HUBNER) (LEPIDOPTERA, PYRALIDAE) IN TAIWAN

(E)-12-Tetradecenyl acetate (E12-14:OAc), (Z)-12-tetradecenyl acetate(Z12-14:OAc),and tetradecanyl acetate (14:OAc) were extracted and identified as major chemical components from female tips of the Asian com borer, Ostrinia furnacalis (Hubner) (Lepidoptera: Pyralidae) in Taiwan, with a combined wash ratio of 48:37:15 and an individual female ratio of 45:39:16. The average amount of E12-, Z12-14:OAc and 14:OAc in each female gland was 6.6 +/- 4.6, 5.8 +/- 3.5, and 2.4 +/- 1.7 ng/female, respectively. The mixture of these three synthetic chemicals not only gave strong activities in male antennae but also could catch significantly more males than virgin females in field-trapping tests. The field test also showed no significant difference in trapping ability among the three-component Taiwan formulations, the two-component Taiwan formulation (E12-14:OAc and Z12-14: OAc, 53:47), and the Japan formulation (Z12-14:OAc and E12-14:OAc, 3:2).