Bioefficacy of Couroupita guianensis (Aubl) against Helicoverpa armigera (Hub.) (Lepidoptera: Noctuidae) larvae
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.Downloads
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Published
2010-03-01
How to Cite
BaskarK., MaheswaranR., KingsleyS., & IgnacimuthuS. (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
Section
Plant health and protection of crops
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