数字农科院2.0

Improving the efficiency and environmental safety of emamectin benzoate through a pH-responsive metal–organic framework microencapsulation strategy

文献类型： 外文期刊

作者： Zheng Wei;Jingxuan Zhu;Ying He;Jie Lai;Bingjie Pan;Kaiyang Feng;Lihan Chen;Lidong Cao;Yan Wang;Kun Qian

作者机构：

关键词： Bioassay;Emamectin benzoate;Nanocontrolled-release formulation;PCN-222;Safety

期刊名称： Journal of Hazardous Materials

ISSN： 0304-3894

年卷期： 2024 年 475 卷

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Herein, we developed a technique for loading nanopesticides onto Metal-Organic Frameworks (MOFs) to control Spodoptera litura. The average short-axis length of the synthesized carrier emamectin benzoate@PCN-222 @hyaluronic acid (EB@PCN-222 @HA) was ∼40 nm, with an average long-axis length of ∼80 nm. This enabled the manipulation of its size, contact angle, and surface tension on the surface of leaves. Pesticide-loading capacity, determined via thermogravimetric analysis, was measured at ∼16 %. To ensure accurate pesticide release in the alkaline intestine of Spodoptera litura, EB@PCN-222 @HA was engineered to decompose under alkaline conditions. In addition, the carrier delayed the degradation rate of EB, enhancing EB's stability. Loading Nile red onto PCN-222 @HA revealed potential entry into the insect body through feeding, which was supported by bioassay experiments. Results demonstrated the sustained-release performance of EB@PCN-222 @HA, extending its effective duration. The impact of different carrier concentrations on root length, stem length, fresh weight, and germination rate of pakchoi and tomato were assessed. Promisingly, the carrier exhibited a growth-promoting effect on the fresh weight of both the crops. Furthermore, cytotoxicity experiments confirmed its safety for humans. In cytotoxicity assays, PCN-222 @HA showed minimal toxicity at concentrations up to 100 mg/L, with cell survival rates above 80 %. Notably, the EB@PCN-222 @HA complex demonstrated reduced cytotoxicity compared to EB alone, supporting its safety for human applications. This study presents a safe and effective approach for pest control using controlled-release pesticides with extended effective durations.

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