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首页> 外文期刊>Environmental Pollution >Essential oil from Negramina (Siparuna guianensis) plants controls aphids without impairing survival and predatory abilities of non- target ladybeetles
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Essential oil from Negramina (Siparuna guianensis) plants controls aphids without impairing survival and predatory abilities of non- target ladybeetles

机译：来自Negramina的精油（西拉努纳毒素）植物控制蚜虫而不损害非目标瓢虫的生存和掠夺性能力

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Plant essential oils are regarded as interesting alternative tools to be integrated into the management of pest insects. However, as they generally consist of mixtures of numerous molecules, the physiological basis for their action is unresolved. Here, we evaluated the effects of essential oil of the Neotropical plant Siparuna guianensis Aubl., commonly known as Negramina, against an important pest insect: the green peach aphid Myzus persicae (Sulzer), and also in two non-target natural enemies: the ladybeetle predators Coleomegilla maculata (DeGeer) and Eriopis connexa (Germar). In addition, we conducted a computational docking analysis for predicting the physical interactions between the two Negramina essential oil major constituents: beta-myrcene and 2-undocanone, and the transient receptor potential (TRP) channels as potential binding receptors in the aphid and ladybeetles. As the most important results, Negramina essential oil caused mortality in M. persicae aphids with an LC95 = 1.08 mg/cm(2), and also significantly repelled the aphids at concentrations as low as 0.14 mg/cm(2). Our computational docking analysis reinforced such selectivity actions as the Negramina essential oil major compounds (i.e., beta-myrcene and 2-undocanone) bound to the TRP channels of M. persicae but not to ladybeetle-related TRP channels. Interestingly, the exposure to the Negramina essential oil did not affect the predatory abilities of C. maculata but increased the abilities of E. connexa to prey upon M. persicae. Collectively, our findings provided a physiological basis for the insecticidal and selectivity potential of Negramina essential oil, reinforcing its potential as a tool to be used in integrated pest control programs. (C) 2019 Elsevier Ltd. All rights reserved.
机译：植物精油被认为是有趣的替代工具，以纳入害虫昆虫的管理。然而，由于它们通常由许多分子的混合物组成，因此其行为的生理基础是未解决的。在这里，我们评估了肌肤植物锡普卢纳桂思群岛的精油的影响。，通常被称为Negramina，对抗一个重要的害虫昆虫：绿色桃蚜Myzus persicae（苏尔寿），也是两个非目标天敌：瓢虫掠食者罗伊奥梅拉maculata（土胶）和埃里孔Connexa（Germar）。此外，我们进行了计算对接分析，用于预测两种Negramina精油主要成分：β-脲烯和2-羟基醌之间的物理相互作用，以及瞬时受体电位（TRP）通道作为蚜虫和瓢虫中的潜在结合受体。作为最重要的结果，Negramina精油在M. Persicae蚜虫中引起了LC95 = 1.08mg / cm（2）的死亡率，并且还显着排斥低至0.14mg / cm（2）的浓度下的蚜虫。我们的计算对接分析加强了这种选择性动作，作为与M.Spericae的TRP通道结合的Negramina精油主要化合物（即，β-脲烯和2-羟基酮），而是与瓢虫相关的TRP通道。有趣的是，接触神经元精油的暴露不影响C. maculata的捕食性能力，而是增加了E. Connexa对M. persicae牺牲的能力。我们的发现，我们的研究结果为Negramina精油的杀虫和选择性潜力提供了生理基础，加强其作为用于综合害虫控制程序的工具的潜力。 （c）2019 Elsevier Ltd.保留所有权利。

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