Efficacy of biosynthesized silver nanoparticles using Leaf extract of Melia azedarach against Spodoptera frugiperda(Lepidoptera: Noctuidae).

Resumo

The present investigation was carried out tothe study ofbiosynthesized AgNPs using leaf extracts ofM.azedarachin S.frugiperda. The UVspectrum of the aqueous medium containing silver nanoparticles showed an absorption peak at around400nm.FTIR was performed to identify the functional groups relatedto different chemical compounds.XRD pattern confirmed the formation of nanocrystals innature.SEM hasbeen used to investigate the morphology of prepared AgNPs.Thirdinstarlarvae were exposed to differentconcentrations of synthesized AgNPs for 24 hrs. The highest mortality was observed inaqueousextract andsynthesized AgNPs againstthirdinstars larvae of S.frugiperdaof LC50 and LC90 values of 36.83(28.05-57.78), 85.71(55.65-425.73) and 25.44(18.27-33.60), 58.65(41.82-143.87) respectively.The silver nanoparticle wasfound to larvicidal activity against S.frugiperda.