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斜纹夜蛾多粒核型多角体病毒多角体在经过蝽象(Eocanthecona furcellata)肠道前后的感染性比较。

A comparison of infectivity between polyhedra of the Spodoptera litura multiple nucleopolyhedrovirus before and after passage through the gut of the stink bug, Eocanthecona furcellata.

作者信息

Gupta R K, Gani Mudasir, Jasrotia P, Srivastava K, Kaul V

机构信息

1Division of Entomology, Sher-e-Kashmir University of Agricultural Sciences and Technology-Jammu, Chatha, Jammu and Kashmir, India - 180009

2GLBRC Research Coordinator, W.K. Kellogg Biological Station; Michigan State University; 3700 E Gull Lake Dr Hickory Corners, MI 49060

出版信息

J Insect Sci. 2014;14:96. doi: 10.1093/jis/14.1.96.

Abstract

Infectivity of polyhedra of Spodoptera litura multiple nucleopolyhedrovirus before and after passage through the gut of the predatory stink bug, Eocanthecona furcellata Wolff (Hemiptera: Pentatomidae) was compared through field bioassay studies. Three sets of E. furcellata were used for bioassays and these were allowed to feed on a single meal of five third instar Oriental leaf worm, Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae), that were infected with polyhedra before passage, after passage, and healthy (control) larvae 1 day prior to the trial. The predators were subsequently released on cabbage plants that were infested with 100 healthy S. litura larvae. The median lethal dose (LD50) and survival time (ST50) values before and after passage through the gut were not significantly different. Additional mortality due to virus infection increased 13- 17% before and after treatments but within these treatments the mortality did not vary significantly. It was concluded that E. furcellata disseminated the virus through their feces into the ecosystem and infectivity of the SpltMNPV was not altered after passage through the gut of the predator.

摘要

通过田间生物测定研究,比较了斜纹夜蛾多角体病毒多角体在捕食性椿象(Eocanthecona furcellata Wolff,半翅目:蝽科)肠道中经过前后的感染力。使用三组E. furcellata进行生物测定,在试验前1天,让它们分别取食一餐感染了多角体的5头斜纹夜蛾(Spodoptera litura (Fabricius),鳞翅目:夜蛾科)三龄幼虫,这些幼虫在经过肠道之前、之后以及健康(对照)幼虫的多角体。随后将捕食者释放到感染了100头健康斜纹夜蛾幼虫的甘蓝植株上。经过肠道前后的半数致死剂量(LD50)和存活时间(ST50)值没有显著差异。处理前后因病毒感染导致的额外死亡率增加了13% - 17%,但在这些处理中,死亡率没有显著变化。得出的结论是,E. furcellata通过粪便将病毒传播到生态系统中,斜纹夜蛾多角体病毒经过捕食者肠道后感染力没有改变。

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