Bioefficacy of Couroupita guianensis (Aubl) against Helicoverpa armigera (Hub.) (Lepidoptera: Noctuidae) larvae

  • K. Baskar Entomology Research Institute, Loyola College.Tamil Nadu
  • R. Maheswaran Entomology Research Institute, Loyola College.Tamil Nadu
  • S. Kingsley Entomology Research Institute, Loyola College.Tamil Nadu
  • S. Ignacimuthu Entomology Research Institute, Loyola College.Tamil Nadu
DOI: https://doi.org/10.5424/sjar/2010081-1152
Keywords: PESTS OF PLANTS, HELICOVERPA ARMIGERA, BIOLOGICAL CONTROL, BOTANICAL PESTICIDES, LECYTHIDACEAE, ANTIFEEDANTS, MORTALITY, PEST CONTROL

Abstract

With a view to develop an ecofriendly botanical pesticide, we evaluated the bioefficacy of crude extracts of Couroupita guianensis against third instar larvae of Helicoverpa armigera. Maximum feeding deterrency (81.67%) and least LC50 (2.72%) for larval mortality were seen in hexane extract. Hexane extract was subjected to column chromatography using different ratio of hexane-ethyl acetate solvent system. Totally eight fractions were collected. The fractions were screened at 125, 250, 500 and 1,000 mg/kg concentrations against H. armigera using no-choice leaf disc method. Fraction eight showed maximum antifeedant (86.24%) and larvicidal (80.88%) activities at 1,000 mg/kg concentration. C. guianensis could be utilized in pest control programme.

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Published
2010-03-01
How to Cite
Baskar, K., Maheswaran, R., Kingsley, S., & Ignacimuthu, S. (2010). Bioefficacy of Couroupita guianensis (Aubl) against Helicoverpa armigera (Hub.) (Lepidoptera: Noctuidae) larvae. Spanish Journal of Agricultural Research, 8(1), 135-141. https://doi.org/10.5424/sjar/2010081-1152
Issue
Vol. 8 No. 1 (2010)
Section
Plant health and protection of crops

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