Chemical composition and bioefficacy of Pimenta dioica, Cinnamomum verum, and Eucalyptus globulus essential oils against stored-product beetles

Rajashekar, Yallappa and Arunima, V. Shine and Aparana, Raj and Krishnaiah, H. Eraiah and Vivek Babu, Chikkarasanahalli S. (2026) Chemical composition and bioefficacy of Pimenta dioica, Cinnamomum verum, and Eucalyptus globulus essential oils against stored-product beetles. Journal of Stored Products Research, 115. pp. 1-9.

PDF 1-s2.0-S0022474X2500342X-main.pdf - Published Version Restricted to Registered users only Download (1MB) | Request a copy

Abstract

The study evaluates the chemical composition and insecticidal properties of essential oils (EOs) from Pimenta dioica, Cinnamomum verum, and Eucalyptus globulus as sustainable alternatives to chemical fumigants for stored grain protection. Gas Chromatography-Mass Spectrometry (GC-MS) analysis identified key compounds: 3-Allyl-6- methoxyphenol, tris(tert-butyldimethylsilyloxy)arsane, and limonene in P. dioica oil; methyl eugenol and cin- namyl ester in C. verum oil; and eucalyptol and α-pinene in E. globulus oil. These bioactive components are linked to their insecticidal efficacy. Fumigant activity was assessed, revealing LC50 values after 24 h of exposure for S. oryzae as 39.9, 147.8, and 38.2 μL L 1, and for T. castaneum as 24.9, 74.9, and 45.3 μL L 1, respectively. Among the EOs, E. globulus demonstrated the highest fumigant toxicity, achieving 100 % mortality at 425 μL/L within 72 h. Contact toxicity tests showed LD50 values of 0.69, 0.31, and 0.88 μL/cm2 for S. oryzae, and 1.09, 0.61, and 1.58 μL/cm2 for T. castaneum after 24 h, indicating moderate effectiveness. The findings underscore the potential of E. globulus as a strong fumigant and C. verum for contact toxicity, attributed to compounds like eucalyptol and methyl eugenol, respectively. These results highlight the potential of these EOs, particularly E. globulus, as eco-friendly alternatives for managing S. oryzae and T. castaneum infestations in stored grains, reducing reliance on synthetic chemical fumigants.

Item Type:	Article
Uncontrolled Keywords:	Bioinsecticides, Stored grain protection, Essential oils, Fumigant activity, Eucalyptus globulus, Cinnamomum verum, Pimenta dioica
Subjects:	600 Technology > 03 Agriculture > 05 Insect/Pest Control 600 Technology > 09 Industrial oils, fats, waxes, gases > 03 Essential oils
Divisions:	Food Protectants and Infestation Control
Depositing User:	Somashekar K S
Date Deposited:	09 Dec 2025 05:25
Last Modified:	09 Dec 2025 05:25
URI:	http://ir.cftri.res.in/id/eprint/20158

Actions (login required)

View Item