Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.
Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
J Econ Entomol. 2019 Dec 9;112(6):2670-2675. doi: 10.1093/jee/toz203.
The green peach aphid, Myzus persicae (Sulzer), is one of the most common pest species that has the potential to transmit more than 100 plant viruses. Controlling this pest is difficult because it has become resistant to a wide range of insecticides. Nanoformulation has the capacity to reduce the pesticide load in agriculture and thus reduce the risks on human health and the environment. In this study, nanocapsules of pirimicarb and pymetrozine were prepared using nanostructured lipid carriers. The size, morphology, and encapsulation efficiency of nanocapsules were investigated using dynamic light scattering, scanning electron microscopy, and UV-VIS spectrophotometer. Zeta potential studies revealed stability of the nanocapsules of both insecticides. The encapsulation efficiencies were 85 and 81% for pirimicarb and pymetrozine, respectively. The nanocapsules were spherical with sizes of 35.38 and 35.12 nm for pirimicarb and pymetrozine, respectively. The LC50 values for the wettable powder (WP) and nanocapsule of pirimicarb after 48 h were 216.2 and 73.2 mg ai/l; for pymetrozine after 96 h, the values were 40.6 and 14.8 mg ai/l, respectively. Durations of residual activity for WP and nanocapsule formulations of pirimicarb were 7 and 15 d, respectively. The residual activity periods for WP and nanocapsule formulations of pymetrozine were 9 and 17 d, respectively. The results revealed that nanoencapsulation can improve performance allowing for reduced doses and increased duration of insecticidal activity for both of the insecticides tested.
绿桃蚜，桃蚜（Sulzer），是最常见的害虫之一，有可能传播超过 100 种植物病毒。控制这种害虫很困难，因为它已经对多种杀虫剂产生了抗性。纳米制剂有能力减少农业中的农药负荷，从而降低对人类健康和环境的风险。在这项研究中，使用纳米结构脂质载体制备了啶虫脒和吡虫啉的纳米胶囊。使用动态光散射、扫描电子显微镜和紫外可见分光光度计研究了纳米胶囊的粒径、形态和包封效率。Zeta 电位研究表明两种杀虫剂的纳米胶囊均稳定。啶虫脒和吡虫啉的包封效率分别为 85%和 81%。纳米胶囊呈球形，啶虫脒和吡虫啉的粒径分别为 35.38 和 35.12nm。48 小时后，可湿性粉剂（WP）和啶虫脒纳米胶囊的 LC50 值分别为 216.2 和 73.2mg ai/l；96 小时后，吡虫啉的 LC50 值分别为 40.6 和 14.8mg ai/l。WP 和啶虫脒纳米胶囊制剂的残效活性期分别为 7 天和 15 天。WP 和吡虫啉纳米胶囊制剂的残效活性期分别为 9 天和 17 天。结果表明，纳米包封可以提高性能，允许减少剂量和增加两种杀虫剂的杀虫活性持续时间。
