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Cinnamomum verum, a source of phytocompound leads against Odoiporus longicollis (Coleoptera: Curculionidae)

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Abstract

Bananas are the fourth most important food crop in the world. Odoiporus longicollis (Oliver), commonly called the banana pseudostem weevil, is one of the serious insect pests that affect the banana production. Though cultural practices and synthetic insecticides are used against this insect pest, indiscriminate use of the synthetic insecticides is expensive, causes health problems or develops pest resistance. The present study was conducted to investigate the insecticidal efficacy of Cinnamomum verum against the fourth instar larvae of O. longicollis, its impeding effects on the pest, and identify the potential bioactive compounds. The acetone extract of the plant showed larvicidal activity in a dose-dependent manner with an LD50 value of 4.12 g/100 mL. The extract induced hyperproteinemia, increased amino acid content, correlated variations in the activity of aspartate transaminase and alanine transaminase, an increase in trehalose content, and a reduction in the haemocyte count of the haemolymph. Fourier transform infrared spectroscopy and high resolution mass spectroscopy analyses of the extract could identify three bioactive compounds: trans-13-octadecenoic acid, 9-octadecenamide and spiro(tricyclo(4.4.0.0.(5.9)]decane-10,2'- oxirane],1- methyl -4- isoprol (relative abundance 7%, 29% and 13%, respectively), resulting in synergistic action. The results suggest C. verum could be used as a source of natural insecticidal agents for the management of O. longicollis, as an alternative to synthetic insecticides.

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Acknowledgements

The authors are very grateful to the Government College for Women, Thiruvananthapuram, Kerala, India for providing lab facilities for the completion of the research work.

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SVP and PKR conceived and designed the experiments. SSA and PKR performed the experiments. SSA and PKR analysed the data. SSA, PKR and SVP wrote the paper. SVP and PKR supervised the work.

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Correspondence to R. Pradeep Kumar.

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The authors have no competing interests to declare that are relevant to the content of this article.

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Aparna, S.S., Savitha, P. & Kumar, R.P. Cinnamomum verum, a source of phytocompound leads against Odoiporus longicollis (Coleoptera: Curculionidae). J Plant Dis Prot 130, 1451–1457 (2023). https://doi.org/10.1007/s41348-023-00799-5

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  • DOI: https://doi.org/10.1007/s41348-023-00799-5

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