International Journal For Multidisciplinary Research

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Volume 8 Issue 4
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UV-Visible spectroscopic analysis of Curcuma longa and Mentha spicata powders for the management of the Callosobruchus maculatus (Chrysomelidae: Coleoptera) on the Pigeon pea Cajanus cajan

Author(s) Mrs. Pandiselvi G, Dr. Rosaline Mary
Country India
Abstract Stored grain losses caused by Callosobruchus maculatus in pigeon pea are a major challenge to food security and seed quality. The widespread use of synthetic insecticides has raised concerns about insect resistance, environmental contamination, and human health risks, creating a need for eco-friendly alternatives. This study evaluated the phytochemical characteristics of turmeric (Curcuma longa L.) and mint (Mentha spicata) powders using UV-Visible (UV-Vis) spectroscopy and assessed their potential as botanical protectants against C. maculatus in stored grains. UV-Vis analysis revealed characteristic absorption peaks corresponding to curcuminoids in turmeric and phenolic compounds, flavonoids, and other secondary metabolites in mint. These bioactive compounds are recognized for their insecticidal, repellent, antioxidant, and antimicrobial properties. The results indicated that both plant powders contain phytochemicals capable of reducing the survival and reproductive performance of C. maculatus. Compounds such as curcumin, turmerones, menthol, menthone, flavonoids, and phenolics likely contributed to insect control through repellency, feeding deterrence, oviposition inhibition, and toxicity. The UV-Vis spectral profiles confirmed the presence of these biologically active constituents, supporting their effectiveness in stored-grain protection. The study demonstrates that turmeric and mint powders are promising, environmentally friendly alternatives to synthetic insecticides for managing pulse beetle infestations and reducing post-harvest losses. Further studies on compound isolation, quantitative phytochemical analysis, and field-scale validation are recommended to optimize their use in integrated stored-product pest management.
Keywords Curcuma longa, Mentha spicata, UV-Visible spectroscopy, Callosobruchus maculatus, pigeon pea, botanical insecticides, stored grains, post-harvest protection.
Field Biology > Zoology
Published In Volume 8, Issue 4, July-August 2026
Published On 2026-07-26
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E-ISSN 2582-2160
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CrossRef DOI prefix of IJFMR is 10.36948/ijfmr

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