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Pesticide Research Journal
Year : 2019, Volume : 31, Issue : 2
First page : ( 187) Last page : ( 196)
Print ISSN : 0970-6763. Online ISSN : 2249-524X.
Article DOI : 10.5958/2249-524X.2019.00028.1

Bioefficacy of Different Solvent Extracts of Sweet Flag, Acorus calamus (L.) Rhizome against Rice weevil, Sitophilus oryzae (L.) (Coleoptera: Dryophthoridae)

Saranya M*, Nelson SJ, Paramasivam M1, Dhivya V

Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India

1Department of Agricultural Chemistry, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India

*Corresponding author E-mail: suganpraveen9@gmail.com

Online published on 8 January, 2020.

Abstract

The insecticidal activity of sweet flag (SF) (Acorus calamus L.) rhizome extracts against the rice weevil, Sitophilus oryzae (L.) on maize during storage is reported. Different solvent extracts were obtained by two extraction methods (soxhlet and mechanical shaker). The hexane extract obtained by both the methods showed cent per cent mortality at 0.1 per cent concentration on the 5th d after treatment (DAT). The maize seed remained protected against damage by the weevil upto 90 d at 0.09 and 0.1 per cent of hexane and ethyl acetate extracts respectively obtained by mechanical shaker extraction. The hexane extracts obtained by both the extraction methods were however, found to be superior. The phytochemical composition of the solvent extracts showed the presence of alkaloids, phenolic compounds, tannins, flavonoids, steroid, terpenoid, glycosides, carbohydrates and protein.

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Keywords

Sweet flag, Acorus calamus, solvent extracts, insecticidal activity, Sitophilus oryzae.

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