Spectral and HRTEM analyses of Annona muricata leaf extract mediated silver nanoparticles and its Larvicidal efficacy against three mosquito vectors Anopheles stephensi, Culex quinquefasciatus, and Aedes aegypti

Author(s):  
Shanthi Bhupathi Santhosh ◽  
Chinnasamy Ragavendran ◽  
Devarajan Natarajan
RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 3838-3851 ◽  
Author(s):  
Chinnasamy Ragavendran ◽  
Nawal Kishore Dubey ◽  
Devarajan Natarajan

The efficacy of bioactive compounds identified from Beauveria bassiana extracts as effective larvicidal and pupicidal agents against Anopheles stephensi, Culex quinquefasciatus and Aedes aegypti mosquito vectors under laboratory conditions are studied.


2020 ◽  
Vol 9 (1) ◽  
pp. 203-210

The available controlling agents for mosquito vectors are chemical insecticides and the frequent usage of these insecticides creating resistance among mosquito vectors and environmental pollutions. Thus, the study was designed to synthesize and characterize the Ag nanoparticles (AgNPs) through a methanol leaf extract of Ocimum canum and find the larvicidal prospective of the AgNPs on the 4th instar larvae of Anopheles stephensi, Culex quinquefasciatus, and Aedes aegypti. The obtained outcomes show that the methanol leaf extract of O. canum was effectively reduced the silver ions and produce constant silver nanoparticles. It was characterized and confirmed by various scientific techniques such as UV-vis spectrum, XRD, SEM, FT-IR and EDaX. Various concentrations (10, 50, 150, 200, and 250 ppm) of characterized nanoparticles were tested for larvicidal activity. The premier larval death was observed at 24 h of treatment on A. aegypti with LC50= 17.03 ppm, followed by C. quinquefasciatus with LC50= 14.89 ppm of methanol extract of O. canum and no death was noticed on A. stephensi. The LD90 value for A. aegypti and C. quinquefasciatus were 24.18 & 20.65 ppm respectively. Hence, the Ag nanoparticles produced from methanol leaf extract of O. canum retains efficiency to control A. aegypti and C. quinquefasciatus. Thus, it might support partially to replace the chemical insecticide which used against these vectors and might contribute to reduce environmental pollution.


2017 ◽  
Vol 28 (5) ◽  
pp. 2477-2492 ◽  
Author(s):  
Manickam Pavunraj ◽  
Kathirvelu Baskar ◽  
Veeramuthu Duraipandiyan ◽  
Naif Abdullah Al-Dhabi ◽  
Venkatachalam Rajendran ◽  
...  

2021 ◽  
Vol 10 (1) ◽  
pp. 742-755
Author(s):  
Ramachandran Ishwarya ◽  
Kavitha Saravanan ◽  
Daniel Selvaraj ◽  
Marimuthu Govindarajan ◽  
Naiyf S. Alharbi ◽  
...  

Abstract Fabrication and use of nanoparticles have progressively enlarged within the last decade. Herein the silver nanoparticles (AgNps) were synthesized via the extract from Marsilea quadrifolia (Mq) as a decreasing and steadying mediator. The Mq-AgNPs demonstrated superior toxicity on Zika virus vector, Aedes aegypti with the LC50 value of 10.69 µg·mL−1. The Mq-AgNPs were established securely to non-target organisms Artemia nauplii and Ceriodaphnia cornuta, and no structural or anatomical alterations confirm its security to the surroundings. The antibacterial activity exposed that Mq-AgNPs showed superior growth inhibition effect against the tested bacteria. Furthermore, the Mq-AgNPs showed strong antioxidant activities when compared to Mq leaf extract. Overall, our results highlight that Mq-AgNPs are hopeful and biodegradable devices against mosquito vectors of therapeutic significance, with moderate toxicity against non-target aquatic animals.


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