Fusarium crown and root rot is among the world's major agricultural diseases caused by Fusarium. oxysporum f. sp. radicis-lycopersici, which always resulted in serious damage to vegetable production worldwide. Pyraclostrobin is a broad-spectrum and highly effective fungicide with strong activity against F. oxysporum f. sp. radicis-lycopersici. However, the limited distribution of pyraclostrobin in the soil compromises its field fungicidal performance due to the difficulty in providing a large protection zone surrounding the growing root system of the plant. Nanotechnology offers a great opportunity to develop new strategies for functionalized pesticide loading systems. In this study, the physicochemical properties of pyraclostrobin in the soil were manipulated by encapsulating the active ingredients in a lignin-modified polymer nanocapsule (NCS) to produce a nanoscale delivery system with excellent soil mobility. These nanocapsules exhibited a stable core-shell structure and rapid release performance. In addition, they also increased the distribution of particles on the surface of target organisms and enhanced the soil mobility of pyraclostrobin, mainly benefitting from the nanocapsule's negatively charged polymer shell and nanoscale size. Pot experiments showed that, compared to treatment with nanosized emulsion in water (NEW) and micron-grade microcapsule suspension (CS) of pyraclostrobin, the NCS provided improved control efficacy on tomato crown and root rot. They also showed lower pesticide residue in the soil than CS treatment.

镰刀菌的冠腐病和根腐病是由镰刀菌引起的世界主要农业疾病之一。oxysporum f 。sp。radicis-lycopersici，它始终对全世界的蔬菜生产造成严重损害。吡菌酯是一种广谱和高效的杀菌剂，对oxysporum f。sp。萝卜糖精。然而，由于难以在植物的生长根系周围提供大的保护区，吡咯菌酯在土壤中的有限分布会损害其田间杀真菌性能。纳米技术为开发功能化农药装载系统的新策略提供了绝佳机会。在这项研究中，通过将活性成分封装在木质素改性的聚合物纳米胶囊（NCS）中来控制吡咯菌酯在土壤中的物理化学性质，以产生具有优异的土壤流动性的纳米级输送系统。这些纳米胶囊表现出稳定的核-壳结构和快速释放性能。此外，它们还增加了目标生物表面上的颗粒分布，并提高了吡菌酯的土壤迁移率，主要受益于纳米胶囊带负电的聚合物壳和纳米级尺寸。盆栽实验表明，与纳米级乳化吡唑醚滨水（NEW）和微米级微胶囊悬浮液（CS）处理相比，NCS对番茄冠和根腐病的防治效果更好。与CS处理相比，它们在土壤中的农药残留量也更低。