Chemical Constituents of Plectranthus tomentosa Extract and Its Control Effect on Tetranychus kanzawai

The repellent and contact effects of Plectranthus tomentosa extracts of leaf and stem tissue on different stages of Tetranychus kanzawai were tested using the leaf-dip and insect-dip methods, and the constituents of the Plectranthus tomentosa extract were also determined. It was found that the repel...

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Bibliographic Details
Published in:Journal of chemistry 2022-07, Vol.2022, p.1-6
Main Authors: Sun, Yuehua, Liu, Tianlei, Sun, Cuiying, Luo, Qing
Format: Article
Language:English
Subjects:
Adults
Agriculture
Aqueous solutions
Biological activity
Biomimetics
Constituents
Gas chromatography
Health aspects
Insects
Mass spectrometry
Mortality
Oils & fats
Pesticides
Statistical analysis
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Summary:The repellent and contact effects of Plectranthus tomentosa extracts of leaf and stem tissue on different stages of Tetranychus kanzawai were tested using the leaf-dip and insect-dip methods, and the constituents of the Plectranthus tomentosa extract were also determined. It was found that the repellent effect on Tetranychus kanzawai female adults has reached up to 84.43% after 60 min, with significant mortality of Tetranychus kanzawai at all growth stages. Sixty-nine components of the extract were identified by gas chromatography-mass spectrometry, of which limonene, followed by terpinolene, were present at the highest concentration. This research demonstrated that Plectranthus tomentosa has strong repellent and contact effects against Tetranychus kanzawai, offering potential natural strategies for the environmentally protective control of Tetranychus kanzawai in tea gardens and providing the foundation for the biomimetic synthesis of pesticides.
ISSN:2090-9063
2090-9071
DOI:10.1155/2022/5609391