概要
目 的
纳米缓释农药在可持续农业发展中应用前景广阔, 了解载体性质对纳米缓释农药杀虫效果的影响, 可为纳米缓释农药的合理设计及其生物毒性评估等提供科技支持. 本文旨在探讨不同尺寸和表面修饰的介孔硅纳米颗粒负载三氯氟氰菊酯对玉米螟 (Guenée) 幼虫的杀虫机理.
创新点
1. 探明了介孔硅纳米颗粒性质 (粒径大小、 表面电荷和疏水性) 对负载三氯氟氰菊酯后杀虫效果的影响; 2. 解析了不同性质介孔硅纳米颗粒负载三氯氟氰菊酯后的杀虫机制.
方 法
1. 在光照和黑暗条件下, 系统比较不同性质介孔硅纳米颗粒负载三氯氟氰菊酯后对玉米螟幼虫致死率的影响; 2. 通过分析玉米螟幼虫氧化应激系统及相关酶活性的变化, 探讨不同性质介孔硅纳米颗粒负载三氯氟氰菊酯后的杀虫机制.
结 论
1. 1. 介孔硅纳米颗粒作为载体可以显著提高三氯氟氰菊酯在光照条件下的杀虫效果 (1.5~3.6倍); 2. 介孔硅纳米颗粒大小对负载三氯氟氰菊酯后杀虫效果无显著影响, 而表面改性会降低杀虫效果; 3. 不同性质的介孔硅纳米颗粒负载三氯氟氰菊酯后会抑制玉米螟幼虫中抗氧化酶活性, 而对Na+/K+-ATP酶活性无显著影响; 4. 介孔硅纳米颗粒作为载体可以增加三氯氟氰菊酯与玉米螟幼虫的接触, 进而导致玉米螟幼虫死亡.
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Acknowledgments
This work is supported by the Zhejiang Provincial Natural Science Foundation of China (No. LD21B070001).
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Yanlong WANG processed the data and wrote the first draft of the manuscript. Shuting XIAO carried out the experiment and processed the data. Daohui LIN helped to organize the manuscript and acquired the funding for this research. Jiang XU designed the research and revised and edited the final version.
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Yanlong WANG, Shuting XIAO, Jiang XU, and Daohui LIN declare that they have no conflict of interest.
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Mechanism of the insecticidal effect of lambda-cyhalothrin loaded mesoporous silica nanoparticles with different sizes and surface modifications on Ostrinia furnacalis (Guenée) larvae
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Wang, Y., Xiao, S., Xu, J. et al. Mechanism of the insecticidal effect of lambda-cyhalothrin loaded mesoporous silica nanoparticles with different sizes and surface modifications on Ostrinia furnacalis (Guenée) larvae. J. Zhejiang Univ. Sci. A 24, 465–472 (2023). https://doi.org/10.1631/jzus.A2200334
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DOI: https://doi.org/10.1631/jzus.A2200334