Graphene oxide as a multifunctional synergist of insecticides against lepidopteran insect

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 cor...

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Bibliographic Details
Published in:Environmental science. Nano 2019-01, Vol.6 (1), p.75-84
Main Authors: Wang, Xiuping, Xie, Haicui, Wang, Zhenying, He, Kanglai, Jing, Dapeng
Format: Article
Language:English
Subjects:
Biological activity
Cement
Chemical pest control
Concrete
Corn
Graphene
Imidacloprid
Insecticides
Insects
Nanomaterials
Nanotechnology
Pest control
Pesticides
Plant protection
Toxicity
Water loss
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Summary: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, β-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 ‘physical 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.
ISSN:2051-8153
2051-8161
DOI:10.1039/C8EN00902C