The invasive stink bug, Bagrada hilaris (Burmeister) (Hemiptera: Pentatomidae), is a serious pest of cole crops. Studies are underway to assess the potential of an exotic egg parasitoid from Pakistan, Ooencyrtus mirus Triapitsyn & Power (Hymenoptera: Encyrtidae), as a biological control agent for this pest. In the present study, the ovipositional preference of O. mirus reared for multiple generations on B. hilaris, Thyanta pallidovirens (Stal), or Nezara viridula (Linnaeus) (Hemiptera: Pentatomidae) for eggs of these three stink bug species was evaluated. The first host accepted for oviposition, the number of parasitoid eggs (as indicated by pedicels) laid on each host egg at different time intervals, and the number of wasps that emerged from parasitized eggs were recorded. Results show that O. mirus prefers eggs of its primary host, B. hilaris, for oviposition over the alternate hosts tested regardless of whether the parasitoids were reared on the primary or alternate hosts. The percent parasitism in the first 2 h of exposure also was higher on B. hilaris eggs although it was not significantly different from T. pallidovirens eggs for parasitoids reared on B. hilaris and N. viridula eggs. For all parasitoid populations, the mean number of emerged wasps per host egg ranged from 0.9 to 1.1 with no significant differences. Bagrada hilaris eggs were significantly smaller than T. pallidovirens and N. viridula eggs and female wasps that emerged from B. hilaris eggs had significantly shorter body length and head width than those that emerged from T. pallidovirens and N. viridula eggs.

中文翻译：

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无论饲养宿主如何，都优先寄生于蝼蛄（半翅目：蝾螈科）上

侵入性臭虫 Bagrada hilaris (Burmeister) (Hemiptera: Pentatomidae) 是油菜作物的一种严重害虫。正在进行研究以评估来自巴基斯坦的外来卵寄生蜂 Ooencyrtus mirus Triapitsyn & Power（膜翅目：Encyrtidae）作为这种害虫的生物防治剂的潜力。在本研究中，评估了在 B. hilaris、Thyanta pallidovirens (Stal) 或 Nezara viridula (Linnaeus) (Hemiptera: Pentatomidae) 上饲养了多代的 O. mirus 对这三种臭虫卵的产卵偏好。记录第一个接受产卵的宿主，在不同时间间隔在每个宿主卵上产下的寄生蜂卵的数量（如花梗所示），以及从寄生卵中出现的黄蜂数量。结果表明 O. mirus 更喜欢其主要宿主 B. hilaris，无论寄生蜂是在主要寄主还是替代寄主上饲养，都在测试的替代寄主上产卵。B. hilaris 卵在接触的前 2 小时内的寄生百分比也较高，尽管在 B. hilaris 和 N. viridula 卵上饲养的寄生蜂与 T. pallidovirens 卵没有显着差异。对于所有寄生蜂种群，每个寄主卵出现的黄蜂平均数量在 0.9 到 1.1 之间，没有显着差异。Bagrada hilaris 卵明显小于 T. pallidovirens 和 N. viridula 卵，从 B. pallidovirens 卵中产生的雌性黄蜂的体长和头部宽度明显短于从 T. pallidovirens 和 N. viridula 卵中产生的雌性黄蜂。无论寄生蜂是在主要寄主还是替代寄主上饲养，都可以在替代寄主上产卵。B. hilaris 卵在接触的前 2 小时内的寄生百分比也较高，尽管在 B. hilaris 和 N. viridula 卵上饲养的寄生蜂与 T. pallidovirens 卵没有显着差异。对于所有寄生蜂种群，每个寄主卵出现的黄蜂平均数量在 0.9 到 1.1 之间，没有显着差异。Bagrada hilaris 卵明显小于 T. pallidovirens 和 N. viridula 卵，从 B. pallidovirens 卵中出现的雌性黄蜂的体长和头部宽度明显短于从 T. pallidovirens 和 N. viridula 卵中出现的那些。无论寄生蜂是在主要寄主还是替代寄主上饲养，都可以在替代寄主上产卵。B. hilaris 卵在接触的前 2 小时内的寄生百分比也较高，尽管在 B. hilaris 和 N. viridula 卵上饲养的寄生蜂与 T. pallidovirens 卵没有显着差异。对于所有寄生蜂种群，每个寄主卵出现的黄蜂平均数量在 0.9 到 1.1 之间，没有显着差异。Bagrada hilaris 卵明显小于 T. pallidovirens 和 N. viridula 卵，从 B. pallidovirens 卵中出现的雌性黄蜂的体长和头部宽度明显短于从 T. pallidovirens 和 N. viridula 卵中出现的那些。hilaris 卵虽然与 T. pallidovirens 卵在 B. hilaris 和 N. viridula 卵上饲养的寄生蜂没有显着差异。对于所有寄生蜂种群，每个寄主卵出现的黄蜂平均数量在 0.9 到 1.1 之间，没有显着差异。Bagrada hilaris 卵明显小于 T. pallidovirens 和 N. viridula 卵，从 B. pallidovirens 卵中出现的雌性黄蜂的体长和头部宽度明显短于从 T. pallidovirens 和 N. viridula 卵中出现的那些。hilaris 卵虽然与 T. pallidovirens 卵在 B. hilaris 和 N. viridula 卵上饲养的寄生蜂没有显着差异。对于所有寄生蜂种群，每个寄主卵出现的黄蜂平均数量在 0.9 到 1.1 之间，没有显着差异。Bagrada hilaris 卵明显小于 T. pallidovirens 和 N. viridula 卵，从 B. pallidovirens 卵中出现的雌性黄蜂的体长和头部宽度明显短于从 T. pallidovirens 和 N. viridula 卵中出现的那些。