首页> 美国卫生研究院文献>International Journal of Insect Science >Effects of Entomopathogenic Fungi on the Biology of Spodoptera litura (Lepidoptera: Noctuidae) and its Reduviid Predator Rhynocoris marginatus (Heteroptera: Reduviidae)
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Effects of Entomopathogenic Fungi on the Biology of Spodoptera litura (Lepidoptera: Noctuidae) and its Reduviid Predator Rhynocoris marginatus (Heteroptera: Reduviidae)

机译:病原性真菌对斜纹夜蛾(鳞翅目:夜蛾科)及其减食性捕食者Rhynocoris marginatus(阔翅目:减食蝇)生物学的影响

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摘要

Entomopathogenic fungi (EPFs), Isaria fumosorosea and Beauveria bassiana, are efficient biological agents in the management of multiple arthropod pests. In this study, the effects of both EPF species on various life stages of Spodoptera litura (F.) (Lepidoptera: Noctuidae) and its natural enemy Rhynocoris marginatus (Fab.) (Hemiptera: Reduviidae) were determined under laboratory conditions. I. fumosorosea significantly (P < .05) reduced the growth rate of the third and fourth instar larvae of S. litura. For relative consumption rate (RCR), the maximum impact was recorded for I. fumosorosea, which reduced the RCR of the larvae. The larvae of S. litura treated with I. fumosorosea showed significantly lower efficiency of conversion of ingested food (ECI) and the larval mortality rate (58.0%) was also higher compared with B. bassiana (33.3%). Similarly, I. fumosorosea had a significant effect on the pupal formation of S. litura; however, no significant effect was found on adult emergence percentage. To determine the effect of EPF-infected prey on the adult predator, their handling time, predatory rate, consumption rate, and the survival rate were recorded. No significant effect of EPF species on the predation rate was found. Furthermore, no significant difference was found in the survival rate of predators fed on either EPF-infected prey or healthy larvae. The interaction of these EPFs with a reduviid predator suggested that both EPF species, especially I. fumosorosea, could be used together with the predator to boost the biological control of S. litura in commercial crops.
机译:病原性真菌(Isaria fumosorosea)和球孢白僵菌(Berveria bassiana)是多种节肢动物害虫管理中的有效生物制剂。在这项研究中,在实验室条件下确定了两种EPF物种对斜纹夜蛾(F。)(鳞翅目:夜蛾科)及其天敌Rhynocoris marginatus(Fab。)(半翅目:Reduviidae)的各个生命阶段的影响。烟曲霉I. fumosorosea显着(P <.05)降低了斜纹夜蛾第三和第四龄幼虫的生长速度。对于相对消耗率(RCR),记录到了对毛果支气单胞菌的最大影响,这降低了幼虫的RCR。烟曲霉处理的斜纹夜蛾幼虫的摄食转化率(ECI)显着降低,幼虫死亡率(58.0%)也高于鲈鱼(33.3%)。类似地,烟曲霉对斜纹夜蛾的up形成有显着影响。然而,对成年出苗率没有显着影响。为了确定EPF感染的猎物对成年捕食者的影响,记录了它们的处理时间,捕食率,消耗率和存活率。没有发现EPF种类对捕食率的显着影响。此外,用EPF感染的猎物或健康幼虫喂养的捕食者的存活率没有显着差异。这些EPFs与重度捕食者的相互作用表明,这两种EPF物种,特别是fumosoroseosea,均可与捕食者一起使用,以增强商业作物中斜纹夜蛾的生物防治。

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