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首页> 外文期刊>Journal of environmental science and health >Development of pyridalyl nanocapsule suspension for efficient management of tomato fruit and shoot borer (Helicoverpa armigerd)
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Development of pyridalyl nanocapsule suspension for efficient management of tomato fruit and shoot borer (Helicoverpa armigerd)

机译：开发用于高效处理番茄果实和嫩芽r的吡虫啉纳米胶囊悬浮液（Helicoverpa armigerd）

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The objective of this study was to evaluate in vitro the insecticidal activity of pyridalyl nanosuspension in comparison to technical material and commercial formulation against larvae of Helicoverpa armigera. Suspension of pyridalyl nanocapsules was prepared, for reducing its dose of application. Compatibility of pyridalyl with sodium alginate was ascertained and a formulation was obtained by optimizing various parameters. Average micelle size of different formulations was around 138 nm and size of pyridalyl was less than 100 nm. Spherical shape and nanosize of capsules was confirmed by Transmission electron microscopy. Zeta potential of optimized formulation was found to be about (-)20 ± 1 Mv indicating acceptable range for expressing physical stability of the nano-capsules. The pyridalyl nanosuspension insecticidal activity increased remarkably, with LC50 values of 40 μg mL~(-1) in comparison to LC_(50) values of technical material (90 μg mL~(-1)) and commercial product (250 μg mL~(-1)). Bioassay results by leaf dip method showed that nanoformulation is 2.26 and 6.25 times more effective against H. armigera as stomach poison than the technical product and commercial formulation respectively. By topical method, the LC_(50) values obtained were 80, 150, and 250 μg mL~(-1) for nanoformulation, technical material, and commercial formulation, respectively, proving our hypothesis. Pyridalyl nanocapsule suspension performed effectively than technical material and commercial product against tomato fruit and shoot borer {Helicoverpa armigera), showing that insecticide load to the environment can be reduced by using nanoformulations.
机译：这项研究的目的是评估吡ida基纳米混悬剂与技术材料和商业配方相比，对棉铃虫幼虫的体外杀虫活性。制备吡啶二酮纳米胶囊的悬浮液，以减少其应用剂量。确定哒嗪与海藻酸钠的相容性，并通过优化各种参数获得制剂。不同制剂的平均胶束大小在138nm左右，吡啶基的大小小于100nm。胶囊的球形和纳米尺寸通过透射电子显微镜确认。发现优化制剂的ζ电势为约（-）20±1Mv，表明表达纳米胶囊的物理稳定性的可接受范围。与工业材料（90μgmL〜（-1））和市售产品（250μgmL〜（LC）的LC_（50）值相比，吡啶基纳米悬浮液的杀虫活性显着提高，LC50值为40μgmL〜（-1）。 -1））。叶浸法的生物测定结果表明，纳米制剂对抗棉铃虫作为胃毒的功效分别是工业产品和商业制剂的2.26和6.25倍。通过局部方法，对于纳米制剂，工业材料和商业制剂，LC_（50）值分别为80、150和250μgmL〜（-1），证明了我们的假设。吡咯烷基纳米胶囊悬浮液比工业材料和商业产品对番茄果实和嫩芽菜（Helicoverpa armigera）的效果更好，表明使用纳米制剂可以减少杀虫剂对环境的负荷。

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