Effect of andrographolide on feeding behaviour ofPapilio demoleus L., (Lepidoptera: papilionidae) larvae
SRINIVASA RAO VATTIKONDA
Journal Title:Asian Journal of Bio Science
Botanical insecticides are currently of interest because of their successful application in plant protection as biocontrol agents.
Andrographolide which was isolated from Andrographis paniculata evaluated for its antifeedant activity against the fourthinstar
larvae of Papilio demoleus. Preliminary screening after 24 hrs and 48 hrs of exposure at a concentration of 200 ppm exhibited
83.60 per cent and 80.05 per cent antifeedant activity significantly. The protected leaf area at 200ppm was 32.08 ± 0.84 sq.cm and
28.55 ± 0.72 sq.cm after 24 hrs. and 48 hrs, respectively. The antifeedant activity of andrographolide was also examined at 150, 100
and 50ppm concentrations which significantly reduced the feeding ability of larvae. The results imply that extract of A. paniculata,
can potentially be used as an alternative pest control agent against the Papilio demoleus larvae.