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On-line Access: 2023-04-25

Received: 2022-07-02

Revision Accepted: 2022-11-17

Crosschecked: 2023-04-25

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Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Jiang XU

https://orcid.org/0000-0003-0369-4848

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Journal of Zhejiang University SCIENCE A 2023 Vol.24 No.5 P.465-472

http://doi.org/10.1631/jzus.A2200334


Mechanism of the insecticidal effect of lambda-cyhalothrin loaded mesoporous silica nanoparticles with different sizes and surface modifications on Ostrinia furnacalis (Guenée) larvae


Author(s):  Yanlong WANG, Shuting XIAO, Jiang XU, Daohui LIN

Affiliation(s):  Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; more

Corresponding email(s):   xujiang6@zju.edu.cn

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Yanlong WANG, Shuting XIAO, Jiang XU, Daohui LIN. Mechanism of the insecticidal effect of lambda-cyhalothrin loaded mesoporous silica nanoparticles with different sizes and surface modifications on Ostrinia furnacalis (Guenée) larvae[J]. Journal of Zhejiang University Science A, 2023, 24(5): 465-472.

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%T 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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A1 - Daohui LIN
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Abstract: 
Toxicity regression equations and half lethal doses (LD50) of LCNS treatment of O. furnacalis larvae at 24, 48, and 72 h are shown in Table 1. The LD50 of LCNS (dissolved in phosphate buffered saline (PBS) solution containing 1% acetonitrile, pH=7.0) at 24, 48, and 72 h was 341.7, 112.1, and 16.3 mg/kg, respectively. These values were used as the toxic dose reference of drug-loaded nanoparticles. Our previous study suggested that increasing the LCNS dose from 10 to 400 mg/kg increased the mortality rate of free LCNS from 25% to 65%; a low dose of M4/L (10 mg/kg) resulted in a higher mortality rate (70%) at 24 h (Xiao et al., 2022). Considering the easy photolysis of LCNS (Xiao et al., 2022), insecticidal experiments using 10 or 200 mg/kg LCNS or M4/L in the diet of the O. furnacalis larvae with 12-h starvation were conducted under dark or light conditions to analyze the effect of light on larval mortality.

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幼虫的杀虫机理

作者:王艳龙1,2,肖舒婷1,徐江1,2,林道辉1,2
机构:1浙江大学,环境与资源学院,中国杭州,310058;2浙江大学,浙江省有机污染过程与控制重点实验室,中国杭州,310058
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.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。

关键词:纳米缓释农药;介孔二氧化硅;高效氯氟氰菊酯;杀虫活性;抗氧化酶活性

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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