Abstract:
In the present study, the Larvicidal activity of biosynthesized silver nanoparticle using leaf extracts of
Andrographis alata was used
against
Culex quinquefasciatus in order to carry out larvicidal activity. Methanolic leaf extract of
Andrographis alata along with AgNPs was significantly inhibits the adult emergence. The percentage of adult emergence inhibition were 08.0±1.3, 14.0±1.3, 30.0±1.5, 45.5±1.5, 58.0±3.2, 76.0±2.4 and 96.0±2.3 % at different concentration viz., 0.1, 0.2, 0.3, 0.4 and 0.5 ppm against the larvae of
Cx.quinquefasciatus. The LC
50 values of the methanolic leaf extract of
Andrographis alata along with silver nanoparticle was 460.05 ppm against late third larva
Cx. quinquefasciatus. The chi-square value 0.25 was significant at
p<0.05 level. In AgNPs, the LI
50 value was 623.12 ppm and the EI
90 value was 1254.35.
The chi –square value 0.03.65 was significant at
p<0.05 level. From the result it is concluded that the plant extract and silver nanoparticles were effectively inhibit the emergence of adult from larvae of
C.
quinquefasciatus.
