Insecticidal Activity of <i>Annona squamosa</i> l. Seed Extracts against the Red Flour Beetle, <i>Tribolium castaneum</i> (Herbst)

  • M Khalequzzaman Institute of Biological Sciences, University of Rajshahi, Rajshahi 6205, BangladeshMedical University
  • Shajia Sultana Institute of Biological Sciences, University of Rajshahi, Rajshahi 6205, Bangladesh
Keywords: Tribolium castaneum, Annona squamosa, custard apple, LD50

Abstract

Insecticidal activity of the seed extracts of custard apple, Annona squamosa L. in petroleum spirit, ethyl acetate, acetone and methanol against Raj, CR 1, FSS II and CTC-12 strains of the red flour beetle, Tribolium castaneum (Herbst) was studied. The seeds were dried, powdered and extracted in Soxhlet`s apparatus in the solvents below 60°C. Extractions were applied on larvae and adult beetles in film residue methods and mortality was recorded after 24 h. For larval bioassay the highest toxicity was recorded for petroleum spirit extract (LD50= 0.03?g cm-2) in Raj strain and the lowest toxicity was for methanol extract (LD50=15.697?g cm-2) in FSS II strain. In adults petroleum spirit extract offered highest toxicity (LD50= 58.697?g cm-2) in CTC 12 strain and the lowest toxicity (LD50=22004.710?g cm-2) was for acetone extract in CR 1 strain. LD50, 95% confidence limits and regression equations are presented. Key words: Tribolium castaneum, Annona squamosa, custard apple, LD50 J. bio-sci. 14: 107-112, 2006

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How to Cite
Khalequzzaman, M., & Sultana, S. (1). Insecticidal Activity of <i>Annona squamosa</i> l. Seed Extracts against the Red Flour Beetle, <i>Tribolium castaneum</i&gt; (Herbst). Journal of Bio-Science, 14, 107-112. https://doi.org/10.3329/jbs.v14i0.453
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