数字农科院2.0

Improving the stability, foliar utilization and biological activity of imidacloprid delivery systems: Size effect of nanoparticles

文献类型： 外文期刊

作者： Qian Du;Fei Gao;Bo Cui;Tingyu Wang;Fangyuan Chen;Zhanghua Zeng;Changjiao Sun;Xinhua Zhou;Haixin Cui

作者机构：

关键词： Biological activity;Foliar utilization;Imidacloprid;Non-carrier-coated pesticide;Size effect;Stability

期刊名称： Environmental Research

ISSN： 0013-9351

年卷期： 2024 年 257 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Nanotechnology could improve the effectiveness and functionality of pesticides, but the size effect of nanopesticides on formulation performance and the related mechanisms have yet to be explored, hindering the precise design and development of efficient and eco-friendly nanopesticides. In this study, two non-carrier-coated imidacloprid formulations (Nano-IMI and Micro-IMI) with identical composition but varying particle size characteristics were constructed to exclude other interferences in the size effect investigation. Nano-IMI and Micro-IMI both exhibited rod-like structures. Specifically, Nano-IMI had average vertical and horizontal axis sizes of 239.5 nm and 561.8 nm, while Micro-IMI exhibited 6.7 μm and 22.1 μm, respectively. Compared to Micro-IMI, the small size effect of Nano-IMI affected the arrangement of interfacial molecules, reduced surface tension and contact angle, thereby improving the stability, dispersibility, foliar wettability, deposition and retention of the nano-system. Nano-IMI exhibited 1.3 times higher toxicity to Aphis gossypii Glover compared to Micro-IMI, attributed to its enhanced foliar utilization efficiency. Importantly, the Nano-IMI did not intensify the toxicity to non-target organism Apis mellifera L. This study systematically elucidates the influence of size effect on key indicators related to the effectiveness and safety, providing a theoretical basis for efficient and safe application of nanopesticides and critical insights into sustainable agriculture and environmental development.

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