Effect of Madhuca indica seed extracts on survival, feeding and development of Helicoverpa armigera (Hubner)

The laboratory study on various extracts of Madhuca indica on feeding and development of Helicoverpa armigera revealed that the methanol extract, found to be more effective in causing antifeedancy with AI 50 value of 7.14%. The hexane, aqueous extract and saponin at the highest concentration showed less than 50.0% antifeedancy. Methanol exrtract was more effective in reducing the larval weight gain against H. armigera, GI 50 value being 5.40% followed by hexane extract 9.32%. When larvae of H. armigera were fed with various extracts of M. indica, saponin inhibibited normal adult emergence by 50.0% at 0.75% followed by methanol 9.80%, and hexane extract 9.83%.