Abstract
Recently the bioactive products of microbes and their nanoformulation particles have been remarkably studied in insecticides. In the present study, the Mannosylerythritol lipids (MELs) biosurfactant produced from Ustilago maydis has been employed in the rapid synthesis of silver nanoparticles (AgNPs). UV–Vis spectrum was initially confirmed the bio-fabricated AgNPs and further characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray, X-ray diffraction, and Fourier transform infrared. The mosquitocidal potency of MELs and AgNPs were assessed against larvae and pupae of Aedes albopictus. The AgNPs exhibited maximum toxicity against Larvae and pupae of Ae. albopictus with LC50 values ranging from 1.03 μg/ml (I) to 1.19 μg/ml (pupae) compared to the MELs toxicity which showed LC50 values ranging from 31 μg/ml (I) to 59 μg/ml (pupae). Further investigations of oxidative stress effects exerted by the tested materials against fourth instar larvae of Ae. albopictus showed an alteration in the levels of total protein, superoxide dismutase, peroxidase, and catalase enzyme activity. Interestingly, the TEM images of the midgut cells of treated larvae explored AgNPs accumulation in the rough endoplasmic reticulum and other cell organelles. Overall, this study suggests that AgNPs could be employed as an efficient tool in mosquito vector control strategies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
