Phytotoxic Effects of Commercial Eucalyptus citriodora , Lavandula angustifolia , and Pinus sylvestris Essential Oils on Weeds, Crops, and Invasive Species

Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry
María Dolores Ibáñez, María Amparo Blázquez

Abstract

essential oils are well known for their pharmacological effectiveness as well as their repellent, insecticide, and herbicide activities. The emergence of resistant weeds, due to the overuse of synthetic herbicides, makes it necessary to find natural alternatives for weed control. The aim of this study was to evaluate the phytotoxic effects of Eucalyptus citriodora, Lavandulaangustifolia, and Pinus sylvestris, three common commercial essential oils, on weeds (Portulaca oleracea, Lolium multiflorum, and Echinochloa crus-galli), food crops (tomato and cucumber), and the invasive species Nicotiana glauca. Methods: to determine herbicidal effects, essential oils were tested at different concentrations (0.125-1µL/mL). The index of germination and seedling length data were recorded over 14 days. the in vitro assays showed that L. angustifolia with linalool (38.7 ± 0.1%), 1,8-cineole (26.5 ± 0.1%), and camphor (14.2 ± 0.1%) as the main compounds showed the most phytotoxic effects affecting seed germination in weeds and tomato, and the aforementioned invasive species. L. multiflorum was the most sensitive weed, particularly to lavender essential oil, which decreased the growth of its hypocotyl and radicle by 87.8% and 76.7%, respectivel...Continue Reading

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Citations

Jun 7, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·María Dolores IbáñezMaría Amparo Blázquez
Nov 19, 2020·Plants·Mercedes VerdeguerFabrizio Araniti
Jan 20, 2021·Ecotoxicology and Environmental Safety·Caixia HanGuanghui Lv

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