Elucidation of larvicidal potential of metallic and environment friendly food-grade nanostructures against Aedes albopictus
Autor: | Toqeer Ahmed, Z. Imran, Shabbar Abbas, Shaheen Akhtar, Muhammad Zeeshan Hyder, Tayyaba Yasmin, Assad Hafeez Bhatti, Shahid Bilal Butt, Irfan Liaqat |
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Rok vydání: | 2020 |
Předmět: |
Insecticides
Curcumin Silver Environmental Engineering Aedes albopictus 010504 meteorology & atmospheric sciences Metal Nanoparticles chemistry.chemical_element Zinc 010501 environmental sciences Insect Control 01 natural sciences Metal Aedes Geochemistry and Petrology Mosquito larvae Animals Environmental Chemistry Pakistan Phylogeny 0105 earth and related environmental sciences General Environmental Science Water Science and Technology biology fungi Spectrometry X-Ray Emission Food grade General Medicine Biodegradation biology.organism_classification Environmentally friendly Sterol chemistry Larva visual_art visual_art.visual_art_medium Spectrophotometry Ultraviolet Nuclear chemistry |
Zdroj: | Environmental Geochemistry and Health. 43:1903-1925 |
ISSN: | 1573-2983 0269-4042 |
Popis: | To combat health challenges associated with mosquito-borne diseases, the larvicidal activity of metallic nanoparticles, food-grade polymeric nano-capsules and insecticides was investigated against larvae of Aedes albopictus as an effective alternate control approach. The Ae. albopictus was identified using sequencing and phylogenetic analyses of COXI, CYTB and ITS2 genes. The characterization of synthesized nanostructures was performed through Zetasizer, UV-VIS spectroscopy, atomic force microscopy, scanning electron microscopy and energy dispersive X-ray spectroscopy. The mosquito larvae were exposed to varying concentration of nanostructures and insecticides, and their percentage mortality was evaluated at different time intervals of 24 h and 48 h exposure. The highest efficacy was observed in zinc oxide nanoparticles (ZnO-NPs) and polymeric nanocapsules FG-Cur E-III (LC50 = 0.24 mg/L, LC90 = 0.6 mg/L) and (LC50 = 3.8 mg/L, LC90 = 9.33 mg/L), respectively, after 24 h; while (LC50 = 0.18 mg/L, LC90 = 0.43 mg/L) and (LC50 = 1.95 mg/L, LC90 = 6.46 mg/L), respectively, after 48 h against fourth instar larvae of Ae. albopictus. Ag, CuO, NiTiO3 and CoTiO3 nanoparticles evaluated in this study also showed promising larvicidal activity. Although ZnO-NPs proved to be effective larvicides, their possible toxicity (producing ROS species) can limit their use. The curcumin nanostructures (FG-Cur E-III) stabilized by food-grade materials are thought to exert their larvicidal activity by binding to sterol carrier protein-2, and depriving the larvae from the essential dietary cholesterol, and bears effective larvicidal potential as safe alternative for chemical larvicides, due to their environment friendly, food-grade and easy biodegradability. |
Databáze: | OpenAIRE |
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