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New Formulation to Accelerate the Degradation of Pesticide Residues: Composite Nanoparticles of Imidacloprid and 24-Epibrassinolide

文献类型： 外文期刊

作者： Zhao, Jingyu 1 ; Song, Rong 3 ; Li, Hui 4 ; Zheng, Qianqi 1 ; Li, Shaomei 1 ; Liu, Lejun 1 ; Li, Xiaogang 1 ; Bai, Lianyang 2 ; Liu, Kailin 1 ;

作者机构： 1.Hunan Agr Univ, Coll Plant Protect, Changsha 410128, Peoples R China

2.Hunan Acad Agr Sci, Hunan Agr Biotechnol Res Inst, Key Lab Biol & Control Weeds, Coll Plant Protect, Changsha 410125, Peoples R China

3.Hunan Acad Agr Sci, Inst Agr Environm & Ecol, Changsha 410125, Peoples R China

4.North Carolina State Univ, Dept Crop & Soil Sci, Raleigh, NC 27695 USA

期刊名称：ACS OMEGA （ 影响因子：4.132； 五年影响因子：4.197 ）

ISSN： 2470-1343

年卷期： 2022 年 7 卷 33 期

页码：

收录情况： SCI

摘要： Pest control effectiveness and residues of pesticides are contradictory concerns in agriculture and environmental conservation. On the premise of not affecting the insecticidal effect, the pesticide residues in the later stage should be degraded as fast as possible. In the present study, composite nanoparticles in a double-layer structure, consisting of imidacloprid (IMI) in the outer layer and plant hormone 24-epibrassinolide (24-EBL) in the inner layer, were prepared by the W/O/W solvent evaporation method using Eudragit RL/RS and polyhydroxyalkanoate as wall materials. The release of IMI in the outer layer was faster and reached the maximum within 24 h, while the release of 24-EBL in the inner layer was slower and reached the maximum within 96 h. The contact angle of the composite nanoparticles was half that of the 5% IMI emulsifiable concentrate (EC), and the deposition of composite nanoparticles on rice was twice that of 5% IMI EC, which increased the pesticide utilization efficiency. Compared with the common pesticide, 5% IMI EC, the insecticidal effect of the composite nanoparticles was stronger than that of planthoppers, with a much lower final residue amount on rice after 21 days. The composite nanoparticles prepared in this study to achieve sustained release of pesticides and, meanwhile, accelerate the degradation of pesticide residues have a strong application potential in agriculture for controlling pests and promoting crop growth.

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