Two ofthemostimportantchallengesfacinghumanityinthe21stcenturycomprisefoodproductionand disease control.Eco-friendlycontroltoolsagainstmosquitovectorsandagriculturalpestsareurgently needed. Insecticidalproductsofmarineoriginhaveahugepotentialtocontrolthesepests.Inthisre- search, wereportedasingle-stepmethodtosynthesizesilvernanoparticles(AgNP)usingtheaqueous leaf extractoftheseaweed Hypnea musciformis, acheap,nontoxicandeco-friendlymaterial,thatworked as reducingandstabilizingagentduringthebiosynthesis.TheformationofAgNPwasconfirmed by surface plasmonresonancebandillustratedinUV–vis spectrophotometer.AgNPwerecharacterizedby FTIR, SEM,EDXandXRDanalyses.AgNPweremostlysphericalinshape,crystallineinnature,withface- centeredcubicgeometry,andtheirmeansizewas40–65 nm.Lowdosesof H. musciformis aqueousex- tract andseaweed-synthesizedAgNPshowedlarvicidalandpupicidaltoxicityagainstthedenguevector Aedes aegypti and thecabbagepest Plutella xylostella. TheLC50 valueofAgNPrangedfrom18.14to 38.23 ppmfor1stinstarlarvae(L1)andpupaeof A.aegypti, andfrom24.5to38.23ppmforL1andpupae of P.xylostella. Both H. musciformis extractandAgNPstronglyreducedlongevityandfecundityof A. aegypti and P.xylostella adults. Thisstudyaddsknowledgeonthetoxicityofseaweedborneinsecticides and green-synthesizedAgNPagainstarthropodsofmedicalandagriculturalimportance,allowingusto propose thetestedproductsaseffectivecandidatestodevelopnewerandcheappestcontroltools.
Characterization and biotoxicity of Hypnea musciformis-synthesized silver nanoparticles as potential eco-friendly control tool against Aedes aegypti and Plutella xylostella
CANALE, ANGELO;Benelli, Giovanni
2015-01-01
Abstract
Two ofthemostimportantchallengesfacinghumanityinthe21stcenturycomprisefoodproductionand disease control.Eco-friendlycontroltoolsagainstmosquitovectorsandagriculturalpestsareurgently needed. Insecticidalproductsofmarineoriginhaveahugepotentialtocontrolthesepests.Inthisre- search, wereportedasingle-stepmethodtosynthesizesilvernanoparticles(AgNP)usingtheaqueous leaf extractoftheseaweed Hypnea musciformis, acheap,nontoxicandeco-friendlymaterial,thatworked as reducingandstabilizingagentduringthebiosynthesis.TheformationofAgNPwasconfirmed by surface plasmonresonancebandillustratedinUV–vis spectrophotometer.AgNPwerecharacterizedby FTIR, SEM,EDXandXRDanalyses.AgNPweremostlysphericalinshape,crystallineinnature,withface- centeredcubicgeometry,andtheirmeansizewas40–65 nm.Lowdosesof H. musciformis aqueousex- tract andseaweed-synthesizedAgNPshowedlarvicidalandpupicidaltoxicityagainstthedenguevector Aedes aegypti and thecabbagepest Plutella xylostella. TheLC50 valueofAgNPrangedfrom18.14to 38.23 ppmfor1stinstarlarvae(L1)andpupaeof A.aegypti, andfrom24.5to38.23ppmforL1andpupae of P.xylostella. Both H. musciformis extractandAgNPstronglyreducedlongevityandfecundityof A. aegypti and P.xylostella adults. Thisstudyaddsknowledgeonthetoxicityofseaweedborneinsecticides and green-synthesizedAgNPagainstarthropodsofmedicalandagriculturalimportance,allowingusto propose thetestedproductsaseffectivecandidatestodevelopnewerandcheappestcontroltools.| File | Dimensione | Formato | |
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