trying... 2657351820161027201812021432-195511532016MarParasitology researchParasitol ResCharacterization and mosquitocidal potential of neem cake-synthesized silver nanoparticles: genotoxicity and impact on predation efficiency of mosquito natural enemies.101510251015-2510.1007/s00436-015-4829-9Mosquitoes (Diptera: Culicidae) serve as important vectors for a wide number of parasites and pathogens of huge medical and veterinary importance. Aedes aegypti is a primary dengue vector in tropical and subtropical urban areas. There is an urgent need to develop eco-friendly mosquitocides. In this study, silver nanoparticles (AgNP) were biosynthesized using neem cake, a by-product of the neem oil extraction from the seed kernels of Azadirachta indica. AgNP were characterized using a variety of biophysical methods, including UV-vis spectrophotometry, FTIR, SEM, EDX, and XRD analyses. Furthermore, the neem cake extract and the biosynthesized AgNP were tested for acute toxicity against larvae and pupae of the dengue vector Ae. aegypti. LC50 values achieved by the neem cake extract ranged from 106.53 (larva I) to 235.36 ppm (pupa), while AgNP LC50 ranged from 3.969 (larva I) to 8.308 ppm (pupa). In standard laboratory conditions, the predation efficiency of a Carassius auratus per day was 7.9 (larva II) and 5.5 individuals (larva III). Post-treatment with sub-lethal doses of AgNP, the predation efficiency was boosted to 9.2 (larva II) and 8.1 individuals (larva III). The genotoxic effect of AgNP was studied on C. auratus using the comet assay and micronucleus frequency test. DNA damage was evaluated on peripheral erythrocytes sampled at different time intervals from the treatment; experiments showed no significant damages at doses below 12 ppm. Overall, this research pointed out that neem cake-fabricated AgNP are easy to produce, stable over time, and can be employed at low dosages to reduce populations of dengue vectors, with moderate detrimental effects on non-target mosquito natural enemies.ChandramohanBalamuruganBDivision of Entomology, Department of Zoology, School of Life sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.MuruganKadarkaraiKDivision of Entomology, Department of Zoology, School of Life sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.PanneerselvamChellasamyCDivision of Entomology, Department of Zoology, School of Life sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.MadhiyazhaganPariPDivision of Entomology, Department of Zoology, School of Life sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.ChandirasekarRamachandranRDivision of Entomology, Department of Zoology, School of Life sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.DineshDevakumarDDivision of Entomology, Department of Zoology, School of Life sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.KumarPalanisamy MaheshPMDivision of Entomology, Department of Zoology, School of Life sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.KovendanKalimuthuKDivision of Entomology, Department of Zoology, School of Life sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.SureshUdaiyanUDivision of Entomology, Department of Zoology, School of Life sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.SubramaniamJayapalJDivision of Entomology, Department of Zoology, School of Life sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.RajaganeshRajapandianRDivision of Entomology, Department of Zoology, School of Life sciences, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.AzizAl ThabianiATFaculty of Science, Department of Biology, University of Tabuk, Tabuk, 71491, Saudi Arabia.SyuheiBanBDepartment of Ecosystem studies, School of Environmental Science, University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga, 522-8533, Japan.AlsalhiMohamad SalehMSDepartment of Physics and Astronomy, Research Chair in Laser Diagnosis of Cancer, King Saud University, Riyadh, Kingdom of Saudi Arabia.DevanesanSandhanasamySDepartment of Physics and Astronomy, Research Chair in Laser Diagnosis of Cancer, King Saud University, Riyadh, Kingdom of Saudi Arabia.NicolettiMarcelloMDepartment of Environmental Biology, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy.WeiHuiHInstitute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou, 350013, Fujian, China.BenelliGiovanniGDepartment of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124, Pisa, Italy. g.benelli@sssup.it.engJournal ArticleResearch Support, Non-U.S. Gov't20151116GermanyParasitol Res87035710932-01130Glycerides0Insect Repellents0Insecticides0Plant Extracts0Terpenes3M4G523W1GSilver4DKJ9B3K2Tneem oilIMAedesdrug effectsgeneticsAnimalsAzadirachtachemistryComet AssayDNA DamageDenguetransmissionGlyceridesGoldfishgeneticsphysiologyHumansInsect RepellentsInsect Vectorsdrug effectsgeneticsInsecticidespharmacologyLarvadrug effectsMetal NanoparticlestoxicityMicronucleus TestsPlant ExtractspharmacologyPlant LeavesPredatory Behaviordrug effectsPupadrug effectsSilverTerpenesArbovirusAzadirachta indicaBiological controlBiosafetyBotanical byproductDengue feverMosquito-borne diseaseNanobiotechnology20151122015111020151118602015111860201611160ppublish2657351810.1007/s00436-015-4829-910.1007/s00436-015-4829-9Mutat Res. 2003 Jan 10;534(1-2):165-7212504765Parasitol Res. 2015 Aug;114(8):2801-526093499Acta Trop. 2013 Dec;128(3):613-2224055718Environ Sci Pollut Res Int. 2015 Dec;22(24):20067-8326300364Environ Toxicol Chem. 2013 Jun;32(6):1264-923417698Asian Pac J Trop Med. 2013 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Characterization and mosquitocidal potential of neem cake-synthesized silver nanoparticles: genotoxicity and impact on predation efficiency of mosquito natural enemies. | LitMetric
Department of Agriculture, Food and Environment, University of Pisa, via del Borghetto 80, 56124, Pisa, Italy.
Published: March 2016
Mosquitoes (Diptera: Culicidae) serve as important vectors for a wide number of parasites and pathogens of huge medical and veterinary importance. Aedes aegypti is a primary dengue vector in tropical and subtropical urban areas. There is an urgent need to develop eco-friendly mosquitocides. In this study, silver nanoparticles (AgNP) were biosynthesized using neem cake, a by-product of the neem oil extraction from the seed kernels of Azadirachta indica. AgNP were characterized using a variety of biophysical methods, including UV-vis spectrophotometry, FTIR, SEM, EDX, and XRD analyses. Furthermore, the neem cake extract and the biosynthesized AgNP were tested for acute toxicity against larvae and pupae of the dengue vector Ae. aegypti. LC50 values achieved by the neem cake extract ranged from 106.53 (larva I) to 235.36 ppm (pupa), while AgNP LC50 ranged from 3.969 (larva I) to 8.308 ppm (pupa). In standard laboratory conditions, the predation efficiency of a Carassius auratus per day was 7.9 (larva II) and 5.5 individuals (larva III). Post-treatment with sub-lethal doses of AgNP, the predation efficiency was boosted to 9.2 (larva II) and 8.1 individuals (larva III). The genotoxic effect of AgNP was studied on C. auratus using the comet assay and micronucleus frequency test. DNA damage was evaluated on peripheral erythrocytes sampled at different time intervals from the treatment; experiments showed no significant damages at doses below 12 ppm. Overall, this research pointed out that neem cake-fabricated AgNP are easy to produce, stable over time, and can be employed at low dosages to reduce populations of dengue vectors, with moderate detrimental effects on non-target mosquito natural enemies.