A comparative study on larvicidal potential of selected medicinal plants over green synthesized silver nano particles

Publication date: March 2018Source: Egyptian Journal of Basic and Applied Sciences, Volume 5, Issue 1Author(s): Syed Zameer Ahmed Khader, Sidhra Syed Zameer Ahmed, Jagadeeswari Sathyan, Mohamed Rafi Mahboob, Kisore P. Venkatesh, Kishore RameshAbstractLarvicidal activity was assessed for alcoholic extracts of Phyllanthus amarus, Annona squamosa, Coccinia grandis and Eclipta prostrata extracted using solvents of various polarity. Third instar stage larvae of Dengue-vector, Aedes aegypti and Japanese encephalitis (JE) causing mosquito Culex tritaeniorhynchus were subjected to larvicidal bioassay at various concentrations (1000, 500, 250 ppm). The results explored that the phytoconstituents and secondary metabolites present in all the plants elucidated potent larvicidal activity. Among the tested extract ethyl acetate, petroleum ether and hexane extract expressed significant larvicidal activity. Similarly, these plants were subjected to green synthesis of silver nanoparticles, characterized and subjected for its larvicidal activity against Anopheles stephensi causing malaria. The synthesized silver nanoparticles were characterized by UV–VIS spectroscopy, Fourier Transform Infra-Red spectroscopy, Scanning Electron Microscopy respectively. The FTIR analysis strongly supported the capping behaviour of bio-reduced synthesized silver nanoparticles which in turn imparted the high stability of the synthesized silver nanoparticles. The average size of synthesized nanoparticles was le...
Source: Egyptian Journal of Basic and Applied Sciences - Category: Science Source Type: research