Biosynthesis of silver nanoparticles by using mangrove plant extract and their potential mosquito larvicidal property.
OBJECTIVE
To identify the larvicidal activities of silver nano particles synthesised with Rhizophora mucronata (R. mucronata) leaf extract against the larvae of Aedes aegypti (Ae. aegypti) and Culex quinquefasciatus (Cx. quinquefasciatus).


METHODS
In vitro larvicidal activities such as LC(50) and LC(90) were assessed for the Ae. aegypti and Cx. quinquefasciatus larval species. Further, characterisation such as UV, XRD, FTIR and AFM analysis were carried out for the synthesised silver nano particles.


RESULTS
The LC(50) value of the synthesised silver nano particle was identified as 0.585 and 0.891 mg/L for Ae. aegypti and Cx. quinquefasciatus larvae respectively. Further, the LC(90) values are also identified as 2.615 and 6.291 mg/L for Ae. aegypti and Cx. quinquefasciatus species respectively. The synthesised silver nanoparticles have maximum absorption at 420 nm with the average size of 60-95 nm. The XRD data showed 2θ intense values with various degrees such as 37.10°, 47.66°, 63.97° and 70.01°. The FTIR data showed prominent peaks in (3 426.89, 2 925.49, 2 869.56, 2 346.95, 1 631.49, 1 031.73, 669.18 and 455.12) different ranges.


CONCLUSIONS
The biosynthesis of silver nanoparticles with leaf aqueous extract of R. mucronata provides potential source for the larvicidal activity against mosquito borne diseases.
School of Energy, Environmental and Natural Resources, Department of Marine and Coastal Studies, Madurai Kamaraj University, Madurai-625 021, Tamil Nadu, India. contact.desigan@gmail.com
M
M
Gnanadesigan
M
M
Anand
S
S
Ravikumar
M
M
Maruthupandy
V
V
Vijayakumar
S
S
Selvam
M
M
Dhineshkumar
A K
AK
Kumaraguru
D000330:Aedes / Q000187:drug effects; D000818:Animals; D000975:Antioxidants / Q000494:pharmacology; D001205:Ascorbic Acid / Q000494:pharmacology; D003465:Culex / Q000187:drug effects; D009033:Culicidae / Q000187:drug effects*; D007814:Larva / Q000187:drug effects; D053768:Metal Nanoparticles / Q000633:toxicity*; D010316:Particle Size; D010936:Plant Extracts / Q000633:toxicity*; D018515:Plant Leaves / Q000737:chemistry*; D043982:Rhizophoraceae / Q000737:chemistry*; D012834:Silver / Q000633:toxicity*
D000975:Antioxidants; D010936:Plant Extracts; D012834:Silver; D001205:Ascorbic Acid