Department of Plant Biosecurity and MARA Key Laboratory of Surveillance and Management for Plant Quarantine Pests, College of Plant Protection, China Agricultural University, Beijing 100193, China.
State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China.
Int J Mol Sci. 2022 Jun 14;23(12):6651. doi: 10.3390/ijms23126651.
There is a great demand for improving the effective utilization of pesticides and reducing their application for sustainable agriculture, and polymeric nanoparticles have provided strong technical support for the efficient delivery of pesticides. To this context, we tried to construct a relatively safe imidaclothiz nano-delivery system for enhanced plant uptake, reduced pesticide residue and improved bioactivity toward green peach aphids. The imidaclothiz could be assembled with the hydrophobic core of SPc through hydrophobic association, which led to the self-assembly of nanoscale imidaclothiz/SPc complex consisting of nearly spherical particles. The SPc decreased the contact angle of imidaclothiz drops and remarkably increased the plant uptake. Furthermore, the bioactivity and control efficacy of imidaclothiz were significantly improved with the help of SPc in both laboratory and field. Excitingly, the residue of imidaclothiz decreased with the help of SPc 7 d after the treatment due to the faster degradation of nanoscale imidaclothiz/SPc complex, which exhibited no negative effects on agronomic traits of tobacco plants. The current study successfully constructed a nano-delivery system for imidaclothiz, which can not only increase the effective utilization of pesticides, but also decrease the pesticide residue.
提高农药有效利用率，减少施用量，实现农业可持续发展的需求巨大，而聚合物纳米粒为农药的高效传递提供了强有力的技术支持。针对这一情况，我们尝试构建了一种相对安全的噻虫嗪纳米递药系统，以提高植物吸收、减少农药残留并提高对绿盲蝽的生物活性。噻虫嗪可以通过疏水作用与 SPc 的疏水内核组装，从而导致由近球形颗粒组成的纳米级噻虫嗪/SPc 复合物的自组装。SPc 降低了噻虫嗪液滴的接触角，并显著增加了植物吸收。此外，在实验室和田间条件下，SPc 显著提高了噻虫嗪的生物活性和防治效果。令人兴奋的是，由于纳米级噻虫嗪/SPc 复合物的快速降解，处理后 7 天，噻虫嗪的残留量减少，而这对烟草植物的农艺性状没有负面影响。本研究成功构建了噻虫嗪的纳米递药系统，不仅可以提高农药的有效利用率，还可以降低农药残留。
