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Journal of Entomological Research
Year : 2009, Volume : 33, Issue : 1
First page : ( 55) Last page : ( 57)
Print ISSN : 0378-9519. Online ISSN : 0974-4576.

Antifeedant activity of Spilanthes acmella flower head extract against Spodoptera litura (Fabricius)

Rani A. Sabitha1,*, Murty U. Suryanarayana2

1Department of Botany, Osmania University, Hyderabad - 500 007, A.P., India.

2Bioinformatics Group, IICT, Hyderabad - 500 007, A.P., India.

*Corresponding author's: E-mail: sabitaammana@yahoo.com

Accepted:  20  March,  2009.

Abstract

Flower head extract of Spilanthes acmella was tested for the antifeedant activity against the third instar larvae of Spodoptera litura. Among different concentrations, 2.5% was the most effective and showed 100% feeding deterrence. It was followed by 2.0% (96.3%), 1.5% (81.0%) and 1.0% (66.6%) respectively. The other concentrations (0.25 and 0.50%) were less effective with percentage of deterrence ranging from 20.1 and 30.8%. The reduced food intake was also reflected in the decrease of relative larval weight at high concentrations.

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