Takasu Keiji, Hirose Yoshimi
Division of Insect Natural Enemies, Institute of Biological Control, Faculty of Agriculture, Kyushu University, 812, Fukuoka, Japan.
Oecologia. 1991 Sep;87(3):319-323. doi: 10.1007/BF00634585.
Two laboratory experiments were conducted to examine the ovipositional preferences of the egg parasitoidOoencyrtus nezarae Ishii (Hymenoptera: Encyrtidae) for parasitized and unparasitizedMegacopta punctatissimum Montandon (Hemiptera: Plataspidae). Females that had never oviposited or that had not oviposite for 3 days preferred recently parasitized hosts more than unparasitized hosts. The preference for recently parasitized hosts appeared to be mediated by the punctures in already parasitized hosts made by the ovipositor of the first female. Survival of the parasitoid progeny was lower in recently parasitized hosts than in unparasitized hosts. However, handling time of parasitized hosts was extremely short relative to that of unparasitized hosts, because the superparasitizing female could use the punctures made by the previous females. It is concluded that the females preferred the parasitized hosts over unparasitized hosts because the benefit of saving time and energy for drilling was more than the cost of progeny survival.
进行了两项实验室实验，以研究卵寄生蜂稻虱红螯蜂（Ooencyrtus nezarae Ishii，膜翅目：跳小蜂科）对被寄生和未被寄生的黑肩绿盲蝽（Megacopta punctatissimum Montandon，半翅目：扁蝽科）的产卵偏好。从未产卵或已3天未产卵的雌蜂更喜欢近期被寄生的寄主，而非未被寄生的寄主。对近期被寄生寄主的偏好似乎是由第一只雌蜂的产卵器在已被寄生的寄主上造成的穿刺所介导的。寄生蜂后代在近期被寄生的寄主中的存活率低于在未被寄生的寄主中的存活率。然而，相对于未被寄生的寄主，被寄生寄主的处理时间极短，因为再次寄生的雌蜂可以利用先前雌蜂造成的穿刺。得出的结论是，雌蜂更喜欢被寄生的寄主而非未被寄生的寄主，因为节省钻孔时间和精力的益处超过了后代存活的代价。
