నైరూప్య

Antimosquito Acitvity Of Leaf Extract Of Neem (Melia azedarach) and Papaya (Carica papaya) detected against the larvae Culex quinquefasciatus

Ramanibai Ravichandran, Deepika Thangaraj and Madhavarani Alwarsamy

To establish the larvicidal activity of solvent extract: Acetone, Methanol, Ethanol, Ethyl acetate, and Chloroform of two plants Neem (Melia azedarach) and Papaya (Carica papaya). L against Culex quinquefasciatus. The result was indicated that Acetone extract of both plants showed highest morality rate when compared with rest of the solvents. Thus C.papaya extract showed highest mortality rate of 61.6% mortality in 24hr at 500 ppm and 93.3% in 48 hr at 300 ppm. LC50 and LC90 values was found to be 80.56ppm and 380.67ppm, 60.89 ppm and 150.75ppm respectively. M. azedarach extract showed highest mortality rate of 90% at 500 ppm in 24hrs and 93.3% in 48hrs at 500 ppm. LC50 and LC90 value was found to be 305.20 ppm and 756.23 ppm, 179.29 and 450.09 ppm respectively. Secondary metabolites present in both plants was analyzed. The phytochemical analysis showed that different plants of Carica papaya and Melia azedarach was contain different bioactive compounds in varying proportions. The plant was extracted using five different organic solvent when compared with two plants, the Melia azedarach shows maximum result of bioactive components in methanol extract and shows the highest secondary metabolites.