Graphene oxide as a multifunctional synergist of insecticides against lepidopteran insect

文献类型： 外文期刊

第一作者： Wang, Xiuping

作者： Wang, Xiuping;Wang, Zhenying;He, Kanglai;Jing, Dapeng;Xie, Haicui

作者机构：

期刊名称：ENVIRONMENTAL SCIENCE-NANO （ 影响因子：8.131； 五年影响因子：8.3 ）

ISSN： 2051-8153

年卷期： 2019 年 6 卷 1 期

页码：

收录情况： SCI

摘要： Application of nanotechnology in plant protection via formulating nanomaterial-based pesticides to improve pesticide bioactivity has attracted significant research interest in recent years. In this study, the synergistic activity and mode of GO for insecticides against a lepidoptera insect Asian corn borer (ACB) were investigated. The results demonstrated excellent synergistic activities of GO for the three types of insecticides, namely, beta-cyfluthrin (Cyf), Monosultap (Mon) and Imidacloprid (Imi). GO-Cyf, GO-Mon and GO-Imi mixtures exhibited 2.1-, 1.51-and 1.83-fold higher contact toxicities than the individual insecticides of Cyf, Mon and Imi, respectively. Our results indicated that the synergistic mechanism may involve the following phenomena: (i) GO can cause 'hysical damage' to the cement layer of insects, resulting in rapid water loss for the insects, (ii) the disrupted cement layer provides a new channel for the penetration of insecticides, and (iii) the GO delivery system can enhance the efficacy of the insecticides. This multifunctional mechanism that allows GO to serve as a synergist for the existing insecticides demonstrates the excellent application potential of GO in pest management.

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