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首页> 外文期刊>Biocontrol Science and Technology >Assessment of the potential for hybridisation between Laricobius nigrinus (Coleoptera: Derodontidae) and Laricobius osakensis, predators of the hemlock woolly adelgid (Hemiptera: Adelgidae)
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Assessment of the potential for hybridisation between Laricobius nigrinus (Coleoptera: Derodontidae) and Laricobius osakensis, predators of the hemlock woolly adelgid (Hemiptera: Adelgidae)

机译：评估黑加仑（Laoleobius nigrinus）（鞘翅目：Derodontidae）和铁杉羊毛（Aemigid）的捕食者（半翅目：Adelgidae）之间的杂交潜力

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In 2003, Laricobius nigrinus Fender was introduced into the eastern United States as a biological control agent of the hemlock woolly adelgid (Adelges tsugae Annand). Following its release, it was discovered that L. nigrinus was hybridising and producing viable progeny with Laricobius rubidus LeConte, a species native to eastern North America. Recently, Laricobius osakensis Montgomery and Shiyake was imported from Japan into the USA as a potential biological control agent of hemlock woolly adelgid. Hybridisation between L. nigrinus and L. rubidus led to interest in the outcome of interactions between L. osakensis and the other two Laricobius spp. The purpose of this study was to determine if L. osakensis could mate with L. nigrinus, if they could produce hybrid progeny, and whether mating interferes with reproductive output. Laricobius spp. were observed mating directly following emergence and found to be capable of producing sterile eggs in the absence of a mating event. Laboratory and confined field studies found no evidence that L. osakensis and L. nigrinus could produce hybrid progeny and the interaction between the two species did not result in a lower reproduction associated with interspecific mating attempts. Interbreeding should therefore not have an impact on biological control using these species. Fecundity experiments showed that L. osakensis produced eggs earlier in the season and at a higher rate than L. nigrinus, suggesting that L. osakensis may have the potential to be an even more successful biological control agent than L. nigrinus.
机译：2003年，Laricobius nigrinus Fender作为铁杉羊毛阿德吉德（Adelges tsugae Annand）的生物防治剂被引入美国东部。释放后，发现黑麦草（L. nigrinus）正在与北美洲东部的拉里比乌斯·鲁比迪斯·勒孔特杂交，并产生有活力的后代。最近，作为日本铁杉羊毛阿德吉德的潜在生物防治剂，日本的Laricobius osakensis Montgomery和Shiyake被进口到美国。 L. nigrinus和L. rubidus之间的杂交引起了对L. osakensis和其他两个Laricobius spp之间相互作用的结果的兴趣。这项研究的目的是确定osakensis是否可以与L. nigrinus交配，是否可以产生杂种后代，以及交配是否干扰生殖产量。 Laricobius spp。观察到它们在出苗后立即交配，并且发现在没有交配事件的情况下能够产生无菌卵。实验室和密闭田间研究未发现任何证据，表明小叶乳杆菌和黑乳杆菌可产生杂种后代，并且两个物种之间的相互作用并未导致与种间交配尝试相关的繁殖降低。因此，杂交不应影响使用这些物种的生物防治。生殖力实验表明，欧氏乳杆菌在该季节较早产卵，并且比黑质乳杆菌的产卵率更高，这表明欧氏乳杆菌有可能成为比黑质乳杆菌更成功的生物防治剂。

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