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VOL. 10, ISSUE 2 (2025)
Evaluation of repellent and insecticidal effects of Cymbopogon citratus (Stapf.) on Sitophilus granarius (Linn.) (Coleoptera: Curculionidae) in cereal storage
Authors
Medona L, Dharani P, K Elumalai
Abstract
Human civilization has advanced significantly
over the last 10,000 years, which has resulted in improvements in resource
management, food production, and storage methods. However, as more land is set
aside for housing, industry, and transportation, the steady loss of farming
over the past few centuries has been exacerbated by faster population growth,
longer life expectancies, and industrial expansion. However, chemical
pesticides are an efficient way to control pests in grains that are kept.
Nonetheless, when grains are consumed, their residues enter the human body and
might create physiological problems. Plant extracts include active compounds
beneficial in plant defence against various insect pests. Assessing the impact
of several solvent extracts from Cymbopogon citratus on the granary
weevil (Sitophilus granarius) is the main goal of this study. The
Entomology Research Unit's insectarium provided the weevils used in this
investigation. Hexane, ethyl acetate, and ethanol were among the solvents used
to extract C. citratus, and the granary weevils were used to assess the
efficacy of each extract concentration. The research showed that as the
concentration of leaf extract and time of exposure increased,
so did the percentage of mortality. The current experiments revealed
that the ethanol extract of C. citratus was more effective than the
other solvents. In 72 hours, the highest repellent was 98.4%, and insecticidal
was 89.5% against S. granarius. The study suggested using C. citratus
as an alternative to synthetic pesticides and the demand for biopesticides as
safer and biodegradable for effective control of S. granarius.
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Pages:1-5
How to cite this article:
Medona L, Dharani P, K Elumalai "Evaluation of repellent and insecticidal effects of <i>Cymbopogon citratus</i> (Stapf.) on <i>Sitophilus granarius</i> (Linn.) (Coleoptera: Curculionidae) in cereal storage". International Journal of Entomology Research, Vol 10, Issue 2, 2025, Pages 1-5
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