Abstract
Here, we have synthesized the silver nanoparticles (AgNPs) by using the soil fungus Aspergillus niger 2587. The results recorded from UV-vis spectrophotometer and transmission electron microscopy (TEM) support the biosynthesis and characterization of AgNPs. The synthesized silver nanoparticles have also been tested against the larvae and pupae of Anopheles stephensi, Culex quinquefasciatus and Aedes aegypti. The efficacy test was performed at different concentrations for a period of different hours by the probit analysis. The larvae of Cx. quinquefasciatus have shown the 100% mortality to the synthesized AgNPs after 1 h of exposure, while the larvae of An. stephensi and Ae. aegypti were found less susceptible to the synthesized AgNPs. The pupa of Ae. aegypti has shown the efficacy LC50 4, LC90 12 and LC99 19 ppm after 2 h of exposure of the synthesized AgNPs, while, the pupae of Cx. quinquefasciatus and An. stephensi were found less susceptible to the synthesized AgNPs. By this approach, it is suggestive that this rapid synthesis of nanoparticles would be proper for developing a biological process for mosquito control.
Highlights
Mosquito vectors are solely responsible for transmitting diseases such as malaria, dengue, chikungunya, Japanese encephalitis, and lymphatic filariasis
The synthesized silver nanoparticles have been tested against the larvae and pupae of Anopheles stephensi, Culex quinquefasciatus and Aedes aegypti
It is suggestive that this rapid synthesis of nanoparticles would be proper for developing a biological process for mosquito control
Summary
Mosquito vectors are solely responsible for transmitting diseases such as malaria, dengue, chikungunya, Japanese encephalitis, and lymphatic filariasis. It is essential to control mosquito population so that people can be protected from mosquito borne diseases. The larvicidal activities of mycosynthesized silver nanoparticles against vectors: Ae. aegypti and An. stephensi responsible for diseases of public health importance have been evaluated [16]. The present communication describes the larvicidal and pupicidal effect of extracellular synthesized silver nanoparticles by using the soil fungi A. niger 2587 against the An. stephensi, Ae. aegypti and Cx. quinquefasciatus mosquitoes. A. niger is filamentous keratinophilic fungi with compact white or yellow basal felt covered by a dense layer of dark-brown to black conidial heads This fungus secret some reducing agents which convert silver nitrate into silver nanoparticles. It can be a useful green exercise to invent and discover new fungal nanolarvicide for respective ecology and environmental management system
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