数字农科院2.0

A Leaf-Adhesive, pH-Responsive Emamectin Benzoate Nanopesticide for Enhanced Efficacy and Reduced Toxicity

文献类型： 外文期刊

作者： Yang, Ming;Wang, Jie;Wang, Bo;Wang, Tengda;An, Changcheng;Wang, Yan;Wang, Yilin

作者机构：

关键词： nanopesticide;cross-linked coacervate;antiwashing;pH-responsive release;low toxicity

期刊名称： ACS APPLIED MATERIALS & INTERFACES

ISSN： 1944-8244

年卷期： 2026 年

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： A precise and low-toxicity pesticide delivery system is essential to enhancing pesticide efficacy and sustainability. Herein, a facile strategy is developed to construct leaf-adhesive and pH-responsive emamectin benzoate nanopesticides (EB NPs), in which Ca2+ cross-links copolymer surfactant/nonionic surfactant/sodium alginate in coacervates. The uniform nanosize of EB NPs enables them to penetrate the microstructure of plant leaves, thereby improving their deposition and antiwashing ability. Moreover, the pH-responsive EB NPs facilitate precise release of encapsulated emamectin benzoate (EB) in the alkaline midgut (pH 9-10) of Plutella xylostella larvae by displacing Ca2+ in the alginate nanoskeleton, along with the nanostructure disintegration. Notably, the acute toxicity of EB NPs to zebrafish is reduced to less than one-seventh that of commercial EB microemulsion formulation. This nanopesticide approach shows excellent potential to improve the pesticide efficacy and safety.

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