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Chemical composition and insecticidal activity of Ocimum basilicum (Lamiaceae) essential oil and its major constituent, estragole against Sitophilus oryzae (Coleoptera: Curculionidae)

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Abstract

Sitophilus oryzae (Coleoptera: Curculionidae) is a serious widespread stored product pest of food grains. Exploration of potential Ocimum chemotypes of Indian origin with unique chemical composition for control of stored grain insect pests is limited. Forage for new alternate chemicals, for the control of stored grain insect pests, is an emerging area of research. In the present study, we report on fumigant and contact toxicity of Ocimum basilicum (Lamiaceae), essential oil (EO) against S. oryzae under without and with food conditions. GC analysis of O. basilicum, essential oil, showed the presence of estragole (85.08%) and linalyl acetate (6.75%) as a major constituent. EO of O. basilicum showed insecticidal efficacy on S. oryzae as a good fumigant and contact toxicity at 48 h of exposure in without food condition. Our results suggest that O. basilicum chemotype with higher amount of estragole might be a promising toxicant for the control of stored grain insect pest (S. oryzae).

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Acknowledgements

BK, PRP, AVR acknowledge the financial support of UGC NET-JRF Fellowship by University Grant Commissions (UGC), Delhi, India. CSV greatly acknowledges the support of MLP 297 In-house project for the financial assistance to carry out the work. Authors acknowledge the support of Director, CSIR-Central Food Technological Research Institute Mysore (CFTRI), 570020, Karnataka, for providing the necessary facilities. Authors thank Mr. Bhavani Eswaran M (Sr. Technical Officer) CIFS, CSIR-CFTRI for GC-MS analysis (PMC Communication Number: PMC/2022-23/44).

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BK, AVR and CSV conceptualized the topic; BK, PRP and AVR performed the experiments and wrote the manuscript; CSV analysed the data and corrected the manuscript. All the authors read and approved the final manuscript.

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Correspondence to C. S. Vivek Babu.

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The authors declared that they do not have any conflict of interest.

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Bincy, K., Remesh, A.V., Prabhakar, P.R. et al. Chemical composition and insecticidal activity of Ocimum basilicum (Lamiaceae) essential oil and its major constituent, estragole against Sitophilus oryzae (Coleoptera: Curculionidae). J Plant Dis Prot 130, 529–541 (2023). https://doi.org/10.1007/s41348-022-00695-4

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  • DOI: https://doi.org/10.1007/s41348-022-00695-4

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