Volume 81, Issue 2 p. 798-808
Research Article

Nano-pesticide delivery system based on UiO-66 with pH sensitivity for precise control of Spodoptera frugiperda

Chaoqun Hou

Chaoqun Hou

College of Plant Protection, Yangzhou University, Yangzhou, China

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Nuo Wei

Nuo Wei

College of Plant Protection, Yangzhou University, Yangzhou, China

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Qianwei Liang

Qianwei Liang

College of Plant Protection, Yangzhou University, Yangzhou, China

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Yifei Tan

Yifei Tan

College of Plant Protection, Yangzhou University, Yangzhou, China

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Xiang Li

Xiang Li

College of Plant Protection, Yangzhou University, Yangzhou, China

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Jianguo Feng

Corresponding Author

Jianguo Feng

College of Plant Protection, Yangzhou University, Yangzhou, China

Correspondence to: Jianguo Feng, College of Plant Protection, Yangzhou University, Yangzhou 225009, China. E-mail: [email protected]

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First published: 18 October 2024

Abstract

BACKGROUND

Metal–organic frameworks have the advantages of easy synthesis, high loading capacity and good biocompatibility, making them essential materials for constructing pesticide nano-delivery systems. In this study, a pH-responsive nano-controlled-release formulation Chl@UiO-66 was prepared using UiO-66 as the nano-scale carrier for adsorbing chlorantraniliprole (Chl).

RESULTS

The appearance, pesticide loading, release behaviour, insecticidal activity, long-term control efficacy and safety of Chl@UiO-66 for non-target organisms were extensively evaluated. The results showed that the prepared Chl@UiO-66 was a regular octahedron with a uniform particle size of 230 nm and pesticide loading of 15.62%. The release of pesticides under alkaline conditions was superior to that under acidic and neutral conditions, which showed pH-responsive performance. Chl@UiO-66 had an excellent ability to protect pesticides from ultraviolet degradation. Compared with chlorantraniliprole suspension concentrate, Chl@UiO-66 had a better control effect against Spodoptera frugiperda and long-term control efficacy. The prepared nano-controlled-release formulation had low toxicity to zebrafish, earthworms and human BEAS-2B cells.

CONCLUSION

Chl@UiO-66 is a new pesticide formulation with high efficacy and low toxicity that provides a smart controlled-release solution. © 2024 Society of Chemical Industry.

CONFLICT OF INTEREST

The authors claim that there is no conflict of interest.

DATA AVAILABILITY STATEMENT

Data sharing is not applicable to this article as no datasets were generated or analysed during the current study.