Key Laboratory of Pesticide Toxicology & Application Technique Shandong Agricultural University Tai'an, Shandong 271018, P. R. China.
State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops Fujian Agriculture and Forestry University Fuzhou, Fujian 350002, P. R. China.
J Agric Food Chem. 2020 Nov 25;68(47):13562-13572. doi: 10.1021/acs.jafc.0c01736. Epub 2020 Nov 11.
It is highly desirable to fabricate a pesticide delivery system with excellent permeability to reduce the damage caused by root-knot nematodes in the soil. In this work, a novel electronegative pesticide nanocarrier was established by bonding anionic lignosulfonate with epoxy resin nanocarriers, which were loaded with abamectin (Aba). The results demonstrated that nanoparticles were negatively charged (-38.4 mV) spheres with an average size of 150 nm, and the encapsulation efficiency of nanocarriers for Aba was 93.4%. Polymer nanocarriers could prevent premature release of Aba and protect active ingredients from microbiological degradation. The adsorption strength of the soil to Aba loaded in nanocarriers was reduced by 6 to 10 times, so nanonematicides have remarkable soil mobility. Meanwhile, nanoparticles could easily penetrate the roots and nematodes. The application test confirmed that the control effect of this nanopesticide was 26-40% higher than that of the other agrochemicals. In consideration of its superior bioactivity and utilization rate, this pesticide delivery system has promising potential to control root-knot nematodes and improve the pesticide's utilization efficiency.
非常希望制造一种具有优异渗透性的农药输送系统，以减少土壤中根结线虫造成的损害。在这项工作中，通过将阴离子木质素磺酸盐与环氧树脂纳米载体结合，建立了一种新型的带负电荷的农药纳米载体，其中负载了阿维菌素（Aba）。结果表明，纳米颗粒带负电荷（-38.4 mV），呈平均粒径为 150nm 的球体，纳米载体对 Aba 的包封效率为 93.4%。聚合物纳米载体可以防止 Aba 的过早释放，并保护有效成分免受微生物降解。负载在纳米载体中的 Aba 在土壤中的吸附强度降低了 6 到 10 倍，因此纳米杀线虫剂具有显著的土壤迁移性。同时，纳米颗粒可以很容易地穿透植物根系和线虫。应用测试证实，这种纳米农药的防治效果比其他农药高出 26-40%。考虑到其优越的生物活性和利用率，这种农药输送系统具有控制根结线虫和提高农药利用率的巨大潜力。
