Planta Med 2022; 88(15): 1461
DOI: 10.1055/s-0042-1759065
Poster Session I

Medicinal plant waste material as a potential source of sustainable agricultural pest repellents

L Pastare∗
1   Institute for Environmental Solutions, “Lidlauks”, Priekuļu parish, Latvia
,
M Berga
1   Institute for Environmental Solutions, “Lidlauks”, Priekuļu parish, Latvia
,
L Kienkas
2   Field and Forest, Izstādes street 2, Priekuļi, Priekuļu parish
,
A Kronberga
2   Field and Forest, Izstādes street 2, Priekuļi, Priekuļu parish
,
K Berķe-Ļubinska
1   Institute for Environmental Solutions, “Lidlauks”, Priekuļu parish, Latvia
,
I Nakurte
1   Institute for Environmental Solutions, “Lidlauks”, Priekuļu parish, Latvia
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The development of new preparations that repel pests while maintaining the benefits that can help the transition to organic farming. Throughout history, medicinal plant extracts have been successfully exploited as insecticides and repellents. Natural pesticides are effective in controlling a wide range of pests, are inexpensive, biodegradable, have a variety of activities and have low toxicity [1]. The aim of this study was to develop raw water extract formulations from essential oil distillation by-products with agricultural pest repellent properties compatible with organic farming regulations. A hot water extraction was used to obtain the extract formulations of bioactive compounds after the atmospheric steam distillation. Phytochemical screening of total flavonoids, tannins, saponins, sugars and phenolic content as well as antioxidant activity using the DPPH assay, was carried out using high-throughput 96-well plate spectroscopic assay methods. Analyses of extract formulations by LC-qTOF-MS revealed bioactive constituents belonging to flavonoids, organic acids, coumarins, lignans, iridoids, alkaloids, aldehydes, ketones and fatty acids. Besides, allelopathic effects of extract formulations were tested using HS-GC-MS analyses of volatile organic compounds released from host plant Cucumis sativus leaves, as well as repellent activity on common agricultural insects such as green peach aphid, greenhouse whitefly and large cabbage butterfly were also tested. The study revealed potential of tested extract formulations significance in developing agricultural pest repellents as an alternative to synthetic insecticides

Acknowledgments

The work has been supported by ERDF project 1.1.1.1/20/A/096 “Essential oil distillation waste streams as a potential source of sustainable plant-based repellent products”.


 


Publication History

Article published online:
12 December 2022

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  • Reference

  • 1 Geraldin MW, Lengai GMW, Muthomi JW, Mbega ER. Phytochemical activity and role of botanical pesticides in pest management for sustainable agricultural crop production. Scientific African 2020; 7
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