Dindo Maria Luisa, Francati Santolo, Lanzoni Alberto, di Vitantonio Cinzia, Marchetti Elisa, Burgio Giovanni, Maini Stefano
Department of Agricultural Sciences, Alma Mater Studiorum University of Bologna, Viale G. Fanin 42, 40127 Bologna, Italy.
Insects. 2016 Nov 24;7(4):67. doi: 10.3390/insects7040067.
(Pallas) has been introduced either intentionally or accidentally in different areas outside its native range, where it is often regarded as invasive. (Schrank) has been recorded to parasitize in the field, both in the native and introduced areas, Italy included. The percent of parasitism found in our field investigation was low (four percent). The effect of exposure time of to and the impact of parasitization on host longevity, oviposition capacity and egg fertility were evaluated in the laboratory. The acceptance and suitability of as host for were then studied, in comparison with the native coccinellid (L.), which shares the same ecological niche. The effects of parasitization on female longevity and reproduction capacity in the exotic vs. the indigenous lady beetle were also investigated. The overall results showed that negatively affected the fitness of , more than that of . The parasitoid may thus play a marginal role in controlling the populations of the Asian lady beetle, without representing a threat to .
（多异瓢虫）已被有意或无意地引入其原生范围之外的不同地区，在这些地区它常被视为入侵物种。（食蚜蝇茧蜂）已被记录在野外寄生，包括在原生地区和引入地区，意大利也有。我们在野外调查中发现的寄生率较低（4%）。在实验室中评估了（多异瓢虫）暴露于（食蚜蝇茧蜂）的时间以及寄生对宿主寿命、产卵能力和卵的繁殖力的影响。然后，与占据相同生态位的本地瓢虫（七星瓢虫）相比，研究了（多异瓢虫）作为（食蚜蝇茧蜂）宿主的接受度和适宜性。还研究了寄生对外来瓢虫与本地瓢虫雌性寿命和繁殖能力的影响。总体结果表明，（食蚜蝇茧蜂）对（多异瓢虫）适合度的负面影响大于对（七星瓢虫）的影响。因此，这种寄生蜂在控制亚洲瓢虫种群方面可能只起很小的作用，而不会对（七星瓢虫）构成威胁。
