数字农科院2.0

Development of performance-matched oxaziclomefone nanosuspension based on the hydrophobic surface characteristics of barnyardgrass for unmanned aerial vehicle sprayer to improve herbicidal activity in direct-seeded rice fields

文献类型： 外文期刊

作者： Xuejian Cheng; Chengying Ding; Aiping Wang; Lidong Cao; Chong Cao; Pengyue Zhao; Manli Yu; Li Zheng; Qiliang

关键词： hydrophobic surface; nanosuspension; unmanned aerial vehicle; herbicidal activity; direct-seeded rice fields

期刊名称： Journal of Integrative Agriculture

ISSN： 2095-3119

年卷期： 2025 年

页码：

收录情况： SCIE（2025版） ; ; CSCD（2025-2026年度） ; ; 科技核心（2024版） ; ; 农林核心（2024版）

摘要： The explosive increase of unmanned aerial vehicle (UAV) sprayers put forward new requirements for pesticide formulations, and there is an imperative necessity to develop targeted, precise, and efficient pesticide formulations based on the surface characteristics of targets to meet the demand for low-volume spraying by UAV. Herein, the performance-matched oxaziclomefone nanosuspension (NS) was constructed based on the hydrophobic surface characteristics of barnyardgrass for UAV sprayers. The results showed that the solid surface free energy of the adaxial and abaxial surfaces of barnyardgrass at different growth stages ranged from 23.73 mJ m-2 to 28.00 mJ m-2, and was dominated by dispersive components. The average sizes of micro-nanostructures on the barnyardgrass surfaces ranged from 251.7 nm to 266.8 nm, and the oxaziclomefone nanoparticles in NS can suitably be embedded into the micro-nanostructures of barnyardgrass surface. The atomization test showed that NS can significantly decrease the percentage of spray droplet size < 100 μm, thereby reducing the potential of droplet drift. Due to the precise regulation of the formulation components, NS exhibited superior wetting, spreading, and adhesion performance on the barnyardgrass surface. Moreover, the NS remarkably enhanced the uptake and translocation of oxaziclomefone in barnyardgrass. Field trials showed that compared to commercial formulation, NS could significantly improve the control efficacy against barnyardgrass in direct-seeded rice fields while demonstrating acceptable safety for rice. Our research provides a novel, promising, and feasible strategy for the development of pesticide formulation based on target surface characteristics and improving the physicochemical properties of dilutions, which is valuable for enhancing the dosage delivery efficiency and improving the control efficiency against pests of UAV sprayers.

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