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Article

Control of Erigeron bonariensis with Thymbra capitata, Mentha piperita, Eucalyptus camaldulensis, and Santolina chamaecyparissus Essential Oils

1
Instituto Agroforestal Mediterráneo, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
2
Università degli Studi di Palermo, Dipartimento di Scienze Agrarie, Alimentari e Forestali, Viale delle Scienze, Ed. 4, 90128 Palermo, Italy
*
Author to whom correspondence should be addressed.
Molecules 2020, 25(3), 562; https://doi.org/10.3390/molecules25030562
Received: 25 November 2019 / Revised: 20 January 2020 / Accepted: 24 January 2020 / Published: 28 January 2020
(This article belongs to the Special Issue Essential Oils in Weed Control and Food Preservation)
In the search of sustainable and environmentally friendly methods for weed control, there is increasing interest in essential oils (EOs) as an approach to reduce synthetic herbicide use. The phytotoxicity of Thymbra capitata, Mentha piperita, Eucalyptus camaldulensis, and Santolina chamaecyparissus EOs against the noxious weed Erigeron bonariensis were evaluated in pre- and post-emergence assays in greenhouse conditions. The EOs were applied at 2, 4, and 8 µL/mL, with Fitoil used as emulsifier. In post-emergence, two ways of application were tested, irrigation and spraying. Several germination parameters (germination %, mean germination time, and synchrony of the germination process) were evaluated in pre-emergence tests, and the phytotoxicity level was assessed in post-emergence. In pre-emergence, all EOs significantly reduced seed germination as compared to the controls, ranking: T. capitata > E. camaldulensis > S. chamaecyparissus > M. piperita. The effectiveness of all EOs varied with the tested dose, always following the rank 2 μL < 4 μL < 8 μL, with T. capitata EO showing full effectiveness even at the lowest dose. In post-emergence, T. capitata was the most effective EO, inducing a rather complete inhibition of plantlet growth at the highest two doses. These EOs demonstrated to have good potential for the formulation of natural herbicides. View Full-Text
Keywords: weed control; natural herbicides; essential oils; Erigeron bonariensis; pre-emergence; post-emergence; seed germination weed control; natural herbicides; essential oils; Erigeron bonariensis; pre-emergence; post-emergence; seed germination
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MDPI and ACS Style

Verdeguer, M.; Castañeda, L.G.; Torres-Pagan, N.; Llorens-Molina, J.A.; Carrubba, A. Control of Erigeron bonariensis with Thymbra capitata, Mentha piperita, Eucalyptus camaldulensis, and Santolina chamaecyparissus Essential Oils. Molecules 2020, 25, 562. https://doi.org/10.3390/molecules25030562

AMA Style

Verdeguer M, Castañeda LG, Torres-Pagan N, Llorens-Molina JA, Carrubba A. Control of Erigeron bonariensis with Thymbra capitata, Mentha piperita, Eucalyptus camaldulensis, and Santolina chamaecyparissus Essential Oils. Molecules. 2020; 25(3):562. https://doi.org/10.3390/molecules25030562

Chicago/Turabian Style

Verdeguer, Mercedes; Castañeda, Luis G.; Torres-Pagan, Natalia; Llorens-Molina, Juan A.; Carrubba, Alessandra. 2020. "Control of Erigeron bonariensis with Thymbra capitata, Mentha piperita, Eucalyptus camaldulensis, and Santolina chamaecyparissus Essential Oils" Molecules 25, no. 3: 562. https://doi.org/10.3390/molecules25030562

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