Di Xue-Yuan, Yan Bin, Tian Shuang, Ren Peng, Wu Hui-Zi, Yang Mao-Fa
Institute of Entomology, Guizhou University; Guizhou Provincial Key Laboratory for Agricultural Pest Management of the Mountainous Region; Scientific Observing and Experimental Station of Crop Pest in Guiyang, Ministry of Agriculture, Guiyang, China.
Guizhou Natural Enemy Propagation Center, Ministry of Agriculture and Rural Affairs, Guizhou University, Guiyang, China.
J Econ Entomol. 2024 Dec 28;117(6):2336-2343. doi: 10.1093/jee/toae236.
Biological control is an effective and sustainable method of integrated pest management. Microplitis manilae (Hymenoptera: Braconidae) is a common internal parasitoid wasp of the order Lepidoptera. To determine a suitable host species for the reproduction of parasitoids, it is essential to assess host suitability and parasitic potential of the parasitized pests. Herein, we investigated host selection and exploitation of M. manilae. We evaluated the parasitic efficacy of M. manilae in 4 pest species in the Spodoptera and Mythimna genera of the Noctuidae family. The results indicated that the parasitism rate of M. manilae on 3 species in the Spodoptera genus is higher than on Mythimna separata in the Mythimna genus, with M. manilae exhibiting a higher parasitism rate and shorter development duration on Spodoptera litura compared to other species. The parasitism rate for 1st instars hosts was 86.67 ± 0.04%, while the development duration was 14.1 ± 0.03 days. However, when parasitizing the 3rd instar of Spodoptera frugiperda, parasitoids showed a higher sex ratio, of 0.71 ± 0.05. Additionally, M. manilae had parasitic effect on M. separata, providing a new choice for its parasitism. The results identify the optimal host, which could enhance and reproduction rate and survival rate of M. manilae, thus facilitating their large-scale propagation. Understanding the parasitic effects of M. manilae on pests can further its field application, also plays a major role in promoting the development of biological control technologies and sustainable agricultural production.
生物防治是一种有效的可持续害虫综合治理方法。马尼拉微颚茧蜂（膜翅目：茧蜂科）是鳞翅目常见的内寄生蜂。为确定适合寄生蜂繁殖的宿主物种，评估被寄生害虫的宿主适宜性和寄生潜力至关重要。在此，我们研究了马尼拉微颚茧蜂的宿主选择和利用情况。我们评估了马尼拉微颚茧蜂对夜蛾科灰翅夜蛾属和黏虫属4种害虫的寄生效果。结果表明，马尼拉微颚茧蜂对灰翅夜蛾属3种害虫的寄生率高于对黏虫属的黏虫，且与其他物种相比，马尼拉微颚茧蜂对斜纹夜蛾的寄生率更高，发育历期更短。一龄宿主的寄生率为86.67±0.04%，发育历期为14.1±0.03天。然而，当寄生草地贪夜蛾三龄幼虫时，寄生蜂的雌雄比更高，为0.71±0.05。此外，马尼拉微颚茧蜂对黏虫有寄生作用，为其寄生提供了新的选择。这些结果确定了最佳宿主，可提高马尼拉微颚茧蜂的繁殖率和存活率，从而促进其大规模繁殖。了解马尼拉微颚茧蜂对害虫的寄生作用可进一步推动其在田间的应用，对促进生物防治技术发展和可持续农业生产也具有重要作用。
