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首页> 外文期刊>Journal of Economic Entomology >Interspecific interaction between Spodoptera exigua multiple nucleopolyhedrovirus and Microplitis bicoloratus (Hymenoptera: Braconidae: Microgastrina) in Spodoptera exigua (Lepidoptera: Noctuidae) larvae
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Interspecific interaction between Spodoptera exigua multiple nucleopolyhedrovirus and Microplitis bicoloratus (Hymenoptera: Braconidae: Microgastrina) in Spodoptera exigua (Lepidoptera: Noctuidae) larvae

机译：斜纹夜蛾多核多角体病毒与双色微虫（膜翅目：Braconidae：Microgastrina）在斜纹夜蛾幼虫之间的种间相互作用

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摘要

Baculoviruses and parasitoids are important biological control factors of insects in integrated pest management. Microplitis bicoloratus Chen (Hymenoptera: Braconidae: Microgastrina) is a solitary endoparasitoid of beet armyworm, Spodoptera exigua (Hbner) (Lepidoptera: Noctuidae) larvae. M. bicoloratus parasitized first to third instars of S. exigua and most effectively parasitized second instars. The survival rate of parasitoids emerging from S. exigua multiple nucleopolyhedrovirus (SeMNPV)-infected hosts decreased with increasing SeMNPV doses at second to fourth instars. In addition, the mortality rate of the host was >80% when coinfected with SeMNPV and M. bicoloratus, regardless of virus doses or the timing of virus treatment. Occlusion body production was significantly reduced in parasitized hosts. A comparison of host weights showed that hosts coinfected with SeMNPV and M. bicoloratus were significantly lighter than those infected with SeMNPV alone, suggesting that the decrease in virus yield resulted from a reduction in larval growth. The viral genome copy number in parasitized host was significantly lower than that in nonparasitized host at 48 and 72 h postinfection. These results suggest that SeMNPV and M. bicoloratus are compatible as S. exigua control agents.
机译：杆状病毒和寄生虫是害虫综合治理中重要的昆虫生物防治因子。小种双色杆菌陈（膜翅目：Braconidae：Microgastrina）是甜菜夜蛾夜蛾（Spodoptera exigua（Hbner））（鳞翅目：Noctuidae）的幼虫。 M. bicoloratus寄生了S. exigua的第一至第三龄幼虫，最有效地寄生了第二龄幼虫。在第二龄至第四龄期，随着感染SeMNPV剂量的增加，来自感染埃塞俄比亚多核多角体病毒（SeMNPV）的宿主出现的寄生虫的存活率降低。此外，与SeMNPV和双色支原体同时感染时，无论病毒剂量或病毒治疗时机如何，宿主的死亡率均> 80％。在被寄生的宿主中，闭塞体的产生显着减少。宿主体重的比较显示，与单独感染SeMNPV的宿主相比，感染SeMNPV和双色分枝杆菌的宿主明显更轻，这表明病毒产量的下降是由于幼虫生长的减少所致。在感染后48小时和72小时，被寄生的宿主的病毒基因组拷贝数显着低于未被寄生的宿主。这些结果表明，SeMNPV和双色分枝杆菌与S. exigua控制剂相容。

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