Abstract
The evaluation of the inhibition effect achieved by essential oils of dill ( Anethum graveolens L . ), oregano ( Origanum vulgare L.), juniper (Juniperus communis L.), sage ( Salvia officinalis L.) and winter savory ( Satureja montana L.) on seed germination and shoot growth of Johnson grass ( Sorghum halepense L.) was tested in laboratory. The chemical composition of essential oils was analyzed by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). The major constituents were carvon (40.5%) and limonene (32.2%) for A. graveolens essential oil, carvacrol (73.7%) for O. vulgare essential oil, α-pinene (43.5%) for J. communis essential oil, b-thujone (32.7%) and camphor (17.2%) for S. officinalis essential oil, thymol (44.6%) and p- cimene (13.4%) for S. montana essential oil. The in vitro study on herbicidal activity was carried out on seed germination and shoots length of S. halepense ; A. graveolens , O. vulgare , S. montana essential oils significantly inhibited the germination and shoot length and their herbicidal activity could be attributed mainly to their high content of carvone, carvacrol and thymol. A. graveolens , O. vulgare and S. montana essential oils reduced seed germination by 61.5%, 52.7% and 47.3%, respectively, while J. communis and S. officinalis essential oils stimulated germination (7.7% and 2.2%, respectively). The shoot growth reduction for almost all essential oils, except J. communis essential oil , was more than 30%. The solution of A. graveolens , O. vulgare and S. montana essential oils exhibited more powerful bio-herbicidal effect compared to J. communis and S. officinalis essential oils on the germination and shoot growth of S. halepense .
Highlights
Modern agriculture is associated with numerous challenges in weed management which occur due to a raising development of weed resistance to herbicides, as well as due to an increased environmental concern and pressure to reduce pesticide use
J. communis essential oil belongs to α–pinene chemotype; its chemical composition is in agreement with compositions reported in other studies (Butkienë et al, 2015; Sela et al, 2011)
The shoots length of S. halepense was reduced by all essential oils to a certain extent (Figure 2); reduction achieved by all essential oils, except J. communis essential oil, was above 37%, representing considerable significant herbicidal effect of four out of tested five essential oils (Figure 2)
Summary
Modern agriculture is associated with numerous challenges in weed management which occur due to a raising development of weed resistance to herbicides, as well as due to an increased environmental concern and pressure to reduce pesticide use To solve this problem researchers discovered alternative protection strategies that could be applied in weed control. Since the reproduction of the plant can be both, generative (seeds) and vegetative (rhizomes), the S. halepense can produce a large number of off springs in each year It is widespread all over the Central Europe, while in Serbia, it is the most abundant in Vojvodina (Follak and Essl, 2013; Vrbnicanin et al, 2009). The objectives of this study were to examine in vitro potential of five essential oils on seed germination and seedlings growth of weed species S. halepense
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
