ホソヘリカメムシ合成集合フェロモンに対するホソヘリカメムシと卵寄生蜂カメムシタマゴトビコバチの反応の差異 Difference in Response of Riptortus clavatus (Thunberg) (Heteroptera : Alydidae) and Its Egg Parasitoid Ooencyrtus nezarae Ishii (Hymenoptera Encyrtidae) to the Synthetic Aggregation Pheromone of R. clavatus
We investigated the attractiveness of the synthetic male aggregation pheromone of <i>Riptortus clavatus</i> for conspecific adults and its parasitic wasp, <i>Ooencyrtus nezarae</i>, using traps placed in fields. The number of <i>R. clavatus</i> adults caught in the pheromone traps increased with increasing amounts of the pheromone lure up to 100 mg. This amount of the synthetic aggregation pheromone seemed to have attractiveness equivalent to ten caged <i>R. clavatus</i> males in summer. However the pheromone traps caught many more adult bugs than the male trap in autumn, suggesting that the amounts of pheromone released from the male bugs change greatly depending on the temperature. Five miligram of (<i>E</i>)-2-hexenyl(<i>Z</i>)-3-hexenoate (E2HZ3H), a component of the synthetic aggregation pheromone, showed the highest attractiveness to <i>O. nezarae</i>. Ten to 50 mg of the synthetic aggregation pheromone which contained 1.4 to 7 mg of E2HZ3H exhibited a peak in <i>O. nezarae catches</i>. Thus, the attractiveness of the synthetic aggregation pheromone to <i>O. nezarae</i> may be simply attributed to the presence of E2HZ3H in the pheromone.
日本応用動物昆虫学会誌 45(4), 215-218, 2001-11-25