Construction of pH/temperature dual-responsive pineapple-like silica-based nanopesticide system for enhanced foliar adhesion

Smart environment-responsive nanopesticides offer significant potential to improve foliar retention and utilization efficiency. We developed a pH/temperature dual-responsive platform (DNF@PSP@AL) using spiky, pineapple-like silica/poly- dopamine nanocarriers and Fe³ ⁺-alkaline lignin for dinotefuran delivery. The nanocarriers' unique morphology enabled strong foliar adhesion. DNF@PSP@AL achieved 25 % loading capacity. The Fe³ ⁺-AL coating acted as a photoresponsive barrier, conferring exceptional UV stability (UV half-life over 10 times that of commercial formulations) and superior rainfall resistance (14 % washout vs. 72 % conventional). The DNF@PSP@AL demonstrated high control efficacy against Plutella xylostella . This work presents a novel nanoformulation strategy enhancing pesticide efficiency and minimizing environmental loss through intelligent, adhesion-promoting design.