Investigation of the Bio-Herbicidal Potential of Essential Oils from Origanum onites L., Origanum majorana L., and their Hybrid (O. onites × O. majorana) on the Germination of Some Weed Seeds
Abstract
The extensive use of synthetic herbicides drives the need for eco-friendly alternatives. This study evaluated the bio-herbicidal potential of essential oils (EOs) from Origanum onites (ORION), O. majorana (ORIMA), a 50% mixture, and an interspecific hybrid (O. onites × O. majorana, MELEZ). Six doses (0.5-16 µl/petri) were tested against ten weed species (Amaranthus albus L., A. hybridus L., A. retroflexus L., Avena sterilis L., Echinochloa colonum (L.) Link, Hirchfeldia incana (L.) Lagr.-Foss., Lolium multiflorum Lam., Portulaca oleracea L., Setaria verticillata (L.) P. Beauv., and Sinapis arvensis L.) (under laboratory conditions. All EOs showed dose-dependent inhibition of seed germination, with complete suppression (100%) typically at 8 and 16 µl/petri. Amaranthus albus, Portulaca oleracea, and Sinapis arvensis were most sensitive, while Avena sterilis, Hirchfeldia incana, and Echinochloa colonum were more tolerant. Probit analysis revealed variable LD₅₀ and LD₉₀ values; for example, the mixture had an LD₅₀ of 0.012 µl/petri against A. albus, and O. majorana EO was highly effective against Lolium multiflorum and S. arvensis (LD₅₀ 0.002 µl/petri each). The results demonstrate strong bio-herbicidal potential, particularly for the interspecific hybrid evaluated here for the first time. These natural products are promising candidates for sustainable weed management in organic agriculture.
Keywords
References
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Details
Primary Language
English
Subjects
Herbology
Journal Section
Research Article
Publication Date
June 29, 2026
Submission Date
March 31, 2026
Acceptance Date
April 28, 2026
Published in Issue
Year 2026 Volume: 29 Number: 1