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

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2847 ◽  
Author(s):  
Ibáñez ◽  
Blázquez
Keyword(s):  
Invasive Species ◽  
Seed Germination ◽  
Essential Oil ◽  
Pinus Sylvestris ◽  
Essential Oils ◽  
In Vitro Assays ◽  
Eucalyptus Citriodora ◽  
Nicotiana Glauca ◽  
Lavandula Angustifolia ◽  
Phytotoxic Effects

Background: 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, Lavandula angustifolia, 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. Results: 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%, respectively, at a dose of 1 µL/mL. Cucumber was the most resistant food crop, with no significant reduction observed in seed germination and hypocotyl growth with E. citriodora and L. angustifolia essential oils. Conclusions: lavender essential oil represents a promising candidate for the development of effective and safe herbicides in the management of L. multiflorum affecting cucumber crops.

scholarly journals Ginger and Turmeric Essential Oils for Weed Control and Food Crop Protection

Plants ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 59 ◽  
Author(s):  
María Ibáñez ◽  
María Blázquez
Keyword(s):  
Seed Germination ◽  
Essential Oil ◽  
Essential Oils ◽  
Mass Spectrometry Analysis ◽  
Chemical Compositions ◽  
Food Crops ◽  
Nicotiana Glauca ◽  
Radicle Growth ◽  
Food Ingredients ◽  
Positive Effects

Ginger and turmeric are two food ingredients that are in high demand due to their flavor and positive effects on health. The biological properties of these spices are closely related to the aromatic compounds they contain. The chemical compositions of their essential oils and their in vitro phytotoxic activity against weeds (Portulaca oleracea, Lolium multiflorum, Echinochloa crus-galli, Cortaderia selloana, and Nicotiana glauca) and food crops (tomato, cucumber, and rice) were studied. Forty-one compounds, accounting for a relative peak area of 87.7% and 94.6% of turmeric and ginger essential oils, respectively, were identified by Gas Chromatography–Mass Spectrometry analysis. Ginger essential oil with α-zingiberene (24.9 ± 0.8%), β-sesquiphelladrene (11.7 ± 0.3%), ar-curcumene (10.7 ± 0.2%), and β-bisabolene (10.5 ± 0.3%) as the main compounds significantly inhibited the seed germination of P. oleracea, L. multiflorum, and C. selloana at the highest dose (1 µL/mL) assayed, as well as the hypocotyl and radicle growth of the weeds. Turmeric essential oil with ar-turmerone (38.7 ± 0.8%), β-turmerone (18.6 ± 0.6%), and α-turmerone (14.2 ± 0.9%) as principal components significantly inhibited the seed germination of C. selloana and hypocotyl and radicle growth of weeds (the latter in particular) at the highest dose, whereas it did not affect either the seed germination or seedling growth of the food crops. Turmeric essential oil can be an effective post-emergent bioherbicide against the tested weeds without phytotoxicity to crops.

scholarly journals Herbicide Potential of Selected Essential Oils From Plants of Lamiaceae and Asteraceae Families

2021 ◽  
Vol 74 ◽  
Author(s):  
Milena Nikolova ◽  
Boryanka Traykova ◽  
Elina Yankova-Tsvetkova ◽  
Tatyana Stefanova ◽  
Anatoli Dzhurmanski ◽  
...  
Keyword(s):  
Seed Germination ◽  
Essential Oil ◽  
Essential Oils ◽  
Trifolium Pratense ◽  
Herbicidal Activity ◽  
Field Conditions ◽  
In Vitro Assays ◽  
Gas Chromatography Mass Spectrometry ◽  
Monarda Fistulosa

Abstract Essential oils from Monarda fistulosa L., Satureja pilosa Vel., Origanum vulgare subsp. hirtum Ietswaart. (Greek oregano), Micromeria dalmatica Benth., Thymus longedentatus (Degen & Urum.) Ronniger, and Artemisa campestris L. were evaluated as inhibitors of seed germination in target plants Lolium perenne L. and Trifolium pratense L. using in vitro assays. The essential oils were applied on the seeds as aqueous solutions at concentrations ranging from 0.5–3.0 µL/mL. Complete inhibition was established at a concentration of 1.5 µL/mL with the most effective essential oils. Oregano oil was evaluated for its inhibitory activity on seed germination under field conditions; the essential oil was applied as an aqueous solution at concentrations of 3, 5, and 10 µL/mL on superabsorbent Terawet. The mass obtained was mixed with the seeds of the target plants and planted in a field. After 1 month, the results were evaluated based on the weight of the aerial parts of the plants from control and experimental areas. At the highest concentration studied, the weight of the plants was 77% lower in the experimental areas than in the controls. The chemical composition of the essential oils was analyzed using gas chromatography–mass spectrometry. The results showed that carvacrol-rich essential oils had a strong inhibitory effect on seed germination. The inclusion of the essential oil on a superabsorbent was a good way to preserve its herbicidal activity under field conditions as this prevented its rapid evaporation.

scholarly journals Phytotoxicity of Essential Oils on Selected Weeds: Potential Hazard on Food Crops

Plants ◽  
2018 ◽  
Vol 7 (4) ◽  
pp. 79 ◽  
Author(s):  
María Ibáñez ◽  
María Blázquez
Keyword(s):  
Seed Germination ◽  
Essential Oil ◽  
Essential Oils ◽  
Mass Spectrometry Analysis ◽  
Gas Chromatography Mass Spectrometry ◽  
Food Crops ◽  
Potential Hazard ◽  
Spectrometry Analysis

The chemical composition of winter savory, peppermint, and anise essential oils, and in vitro and in vivo phytotoxic activity against weeds (Portulaca oleracea, Lolium multiflorum, and Echinochloa crus-galli) and food crops (maize, rice, and tomato), have been studied. Sixty-four compounds accounting for between 97.67–99.66% of the total essential oils were identified by Gas Chromatography-Mass Spectrometry analysis. Winter savory with carvacrol (43.34%) and thymol (23.20%) as the main compounds produced a total inhibitory effect against the seed germination of tested weed. Menthol (48.23%), menthone (23.33%), and iso-menthone (16.33%) from peppermint only showed total seed germination inhibition on L. multiflorum, whereas no significant effects were observed with trans-anethole (99.46%) from anise at all concentrations (0.125–1 µL/mL). Low doses of peppermint essential oil could be used as a sustainable alternative to synthetic agrochemicals to control L. multiflorum. The results corroborate that in vivo assays with a commercial emulsifiable concentrate need higher doses of the essential oils to reproduce previous in vitro trials. The higher in vivo phytotoxicity of winter savory essential oil constitutes an eco-friendly and less pernicious alternative to weed control. It is possible to achieve a greater in vivo phytotoxicity if less active essential oil like peppermint is included with other active excipients.

scholarly journals Herbicidal potential of lavender (Lavandula angustifolia Mill.) essential oil components on bristly foxtail (Setaria verticillata (L.) P. Beauv.): Comparison with carvacrol, carvone, thymol and eugenol

2020 ◽  
Vol 72 (2) ◽  
pp. 223-231
Author(s):  
Katerina Koiou ◽  
Ioannis Vasilakoglou ◽  
Kico Dhima
Keyword(s):  
Essential Oil ◽  
Synergistic Effect ◽  
Essential Oils ◽  
Weed Control ◽  
Root Length ◽  
Linalyl Acetate ◽  
Lavandula Angustifolia ◽  
Natural Herbicides ◽  
Setaria Verticillata ◽  
Oil Components

Essential oils are a plentiful source of plant compounds for potential use in the development of natural herbicides. With this in mind, the phytotoxicity of ten major essential oil components of lavender (Lavandula angustifolia Mill.) on the weed species bristly foxtail (Setaria verticillata (L.) P. Beauv.) was determined using a perlite-based Petri-dish bioassay. Their phytotoxicity was also compared with that of well-known phytotoxic essential oil components (carvacrol, thymol, carvone and eugenol) of oregano (Origanum vulgare L.) and clove (Syzygium aromaticum (L.) Merr. & L.M. Perry) essential oils. Potential synergistic or antagonistic effects between carvacrol or eugenol with other components of lavender essential oil were investigated. Regarding the most phytotoxic components, terpinen-4-ol at 80 nL/cm3 completely inhibited the germination and root length of bristly foxtail, displaying similar phytotoxicity to carvone and thymol. Like carvacrol, lavandulol and linalyl acetate caused total (100%) germination and root length reduction of bristly foxtail at 160 nL/cm3, while the same effect was achieved by lavandulyl acetate at 320 nL/cm3. A synergistic effect was also observed when carvacrol or eugenol were combined with ocimene, 3-octanone, ?-terpineol or terpinen-4-ol. Focusing on the development of alternative weed control strategies, lavender essential oils containing high concentrations of terpinen-4-ol, lavandulol or linalyl acetate could be useful for the production of natural herbicides. These essential oil components combined with selected oregano or clove essential oil components, increase phytotoxicity and weed control due to the synergistic effect observed when in mixture.

scholarly journals Identification of Essential Oils with Strong Activity against Stationary Phase Borrelia burgdorferi

Antibiotics ◽  
2018 ◽  
Vol 7 (4) ◽  
pp. 89 ◽  
Author(s):  
Jie Feng ◽  
Wanliang Shi ◽  
Judith Miklossy ◽  
Genevieve Tauxe ◽  
Conor McMeniman ◽  
...  
Keyword(s):  
Lyme Disease ◽  
Essential Oil ◽  
Stationary Phase ◽  
Essential Oils ◽  
Allium Sativum ◽  
Thymus Vulgaris ◽  
Eucalyptus Citriodora ◽  
Strong Activity ◽  
Highly Active ◽  
Litsea Cubeba

Lyme disease is the most common vector borne-disease in the United States (US). While the majority of the Lyme disease patients can be cured with 2–4 weeks antibiotic treatment, about 10–20% of patients continue to suffer from persisting symptoms. While the cause of this condition is unclear, persistent infection was proposed as one possibility. It has recently been shown that B. burgdorferi develops dormant persisters in stationary phase cultures that are not killed by the current Lyme antibiotics, and there is interest in identifying novel drug candidates that more effectively kill such forms. We previously identified some highly active essential oils with excellent activity against biofilm and stationary phase B. burgdorferi. Here, we screened another 35 essential oils and found 10 essential oils (Allium sativum L. bulbs, Pimenta officinalis Lindl. berries, Cuminum cyminum L. seeds, Cymbopogon martini var. motia Bruno grass, Commiphora myrrha (T. Nees) Engl. resin, Hedychium spicatum Buch.-Ham. ex Sm. flowers, Amyris balsamifera L. wood, Thymus vulgaris L. leaves, Litsea cubeba (Lour.) Pers. fruits, Eucalyptus citriodora Hook. leaves) and the active component of cinnamon bark cinnamaldehyde (CA) at a low concentration of 0.1% have strong activity against stationary phase B. burgdorferi. At a lower concentration of 0.05%, essential oils of Allium sativum L. bulbs, Pimenta officinalis Lindl. berries, Cymbopogon martini var. motia Bruno grass and CA still exhibited strong activity against the stationary phase B. burgdorferi. CA also showed strong activity against replicating B. burgdorferi, with a MIC of 0.02% (or 0.2 μg/mL). In subculture studies, the top five essential oil hits Allium sativum L. bulbs, Pimenta officinalis Lindl. berries, Commiphora myrrha (T. Nees) Engl. resin, Hedychium spicatum Buch.-Ham. ex Sm. flowers, and Litsea cubeba (Lour.) Pers. fruits completely eradicated all B. burgdorferi stationary phase cells at 0.1%, while Cymbopogon martini var. motia Bruno grass, Eucalyptus citriodora Hook. leaves, Amyris balsamifera L. wood, Cuminum cyminum L. seeds, and Thymus vulgaris L. leaves failed to do so as shown by visible spirochetal growth after 21-day subculture. At concentration of 0.05%, only Allium sativum L. bulbs essential oil and CA sterilized the B. burgdorferi stationary phase culture, as shown by no regrowth during subculture, while Pimenta officinalis Lindl. berries, Commiphora myrrha (T. Nees) Engl. resin, Hedychium spicatum Buch.-Ham. ex Sm. flowers and Litsea cubeba (Lour.) Pers. fruits essential oils all had visible growth during subculture. Future studies are needed to determine if these highly active essential oils could eradicate persistent B. burgdorferi infection in vivo.

scholarly journals Contribution to the Analysis of the Volatile Constituents from some Lavender and Lavandin Cultivars Grown in Greece

2003 ◽  
Vol 71 (3) ◽  
pp. 229-234 ◽  
Author(s):  
Paschalina Chakopoulou ◽  
Apostolos Goliaris ◽  
S. Katsiotis
Keyword(s):  
Essential Oil ◽  
Qualitative Analysis ◽  
Essential Oils ◽  
Essential Oil Composition ◽  
Oil Composition ◽  
Lavandula Angustifolia ◽  
Volatile Constituents

The essential oils of Lavandula angustifolia and the Lavandin hybrids "super" and "special" grown in Greece, were studied in order to evaluate their quality as far as the correlation of their essential oil composition. The essential oil yields were determined to 4.4%, 7.5% and 8.5% in the lavandula and lavandin "super" and "special" hybrids respectively. Fifty-nine constituents were identiiied representing the 99% of the oils. The qualitative analysis of the oils was carried out by GCIMS and revealed that linalool and linalylacetate were the predominant constituents. Remarkable differences were noticed between the camphor percentages among them (11.35% and 5.03% for the "super " and "special" respectively).

scholarly journals Effect of some Essential Oils on Seed Germination and Seedling Length of Parthenium hysterophorous L.

2009 ◽  
Vol 15 ◽  
pp. 69-73 ◽  
Author(s):  
V. R. Paudel ◽  
V.N. P. Gupta
Keyword(s):  
Seed Germination ◽  
Essential Oil ◽  
Essential Oils ◽  
Key Words ◽  
Distilled Water ◽  
Plant Essential Oils ◽  
Seedling Length ◽  
Noxious Weed ◽  
Filter Papers ◽  
Plant Sources

Effect of plant essential oils on seed germination and seedling growth of Parthenium hysterophorus was examined. Essential oils of Eucalyptus, Camphor, and Lemongrass were used in the experiments at different concentrations (0 to 20 ml.l-1). Water imbibed (36 h) seeds were germinated at 25°C ± 1 in petriplates containing 3 layers of filter papers soaked in distilled water and added with 1.5 ml of a given essential oil of particular concentration. Experiments were carried out taking three replicas. Observations were made at an interval of 24 h from the 4th day of incubation till 20th. All essential oils significantly (P < 0.05) reduced seed germination irrespective of their sources. Effects of plant sources were, however, not significant (P>0.05). Key words: Noxious weed, terpenes, sesquiterpenes, essential oil.   doi: 10.3126/eco.v15i0.1945 ECOPRINT 15: 69-73, 2008

scholarly journals Composition, in vitro Antibacterial and Anti-mildew Fungal Activities of Essential Oils from Twig and Fruit Parts of Eucalyptus citriodora

2017 ◽  
Vol 12 (10) ◽  
pp. 1934578X1701201
Author(s):  
Yu-Chang Su ◽  
Kuang-Ping Hsu ◽  
Chen-Lung Ho
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Caryophyllene Oxide ◽  
Main Constituent ◽  
Eucalyptus Citriodora ◽  
Active Source ◽  
Fruit Oil ◽  
Type Apparatus

In this study, antibacterial and anti-mildew fungal activities of the twig and fruit essential oil and its constituents from Eucalyptus citriodora were investigated in vitro against eight bacteria and seven mildew fungi, respectively. The major ingredient responsible for the antibacterial and anti-mildew fungal activities were also identified. The essential oil from the fresh twigs and fruits of E. citriodora were isolated using hydrodistillation in a Clevenger-type apparatus, and characterized by GC–FID and GC–MS, respectively. The twig oil consisted primarily of 1,8-cineole (17.7%), p-cymene (17.1%), caryophyllene oxide (13.8%), and isopulegol (12.2%); the fruit oil's main constituent was p-cymene (23.2%), α-pinene (16.1%), α-cadinol (11.5%), and τ-cadinol (8.4%). In addition, comparing the antibacterial and anti-mildew fungal activities of the oils showed that the fruit oil was the most effective. For the antibacterial and anti-mildew fungal activities of the fruit oil, the active source compounds were determined to be τ-cadinol and τ-cadinol.

scholarly journals Activity of Free and Liposome-Encapsulated Essential Oil from Lavandula angustifolia against Persister-Derived Biofilm of Candida auris

Antibiotics ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 26
Author(s):  
Elisabetta de Alteriis ◽  
Angela Maione ◽  
Annarita Falanga ◽  
Rosa Bellavita ◽  
Stefania Galdiero ◽  
...  
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Fungal Pathogens ◽  
Fungal Infections ◽  
Intrinsic Resistance ◽  
Candida Auris ◽  
Lavandula Angustifolia ◽  
Model Following ◽  
Global Threat ◽  
First Time

The high virulence of Candida auris, a pathogen fungus considered as a global threat for public health, is due to its peculiar traits such as its intrinsic resistance to conventional antifungals. Its biofilm lifestyle certainly promotes the prolonged survival of C. auris after disinfection or antifungal treatments. In this work, for the first time, we detected persister cells in a biofilm of C. auris in a microwell plate model, following caspofungin treatment. Furthermore, we showed how persisters can progressively develop a new biofilm in situ, mimicking the re-colonization of a surface which may be responsible for recalcitrant infections. Plant-derived compounds, such as essential oils, may represent a valid alternative to combat fungal infections. Here, Lavandula angustifolia essential oil, as free or encapsulated in liposomes, was used to eradicate primary and persister-derived biofilms of C. auris, confirming the great potential of alternative compounds against emergent fungal pathogens. As in other Candida species, the action of essential oils against C. auris involves ROS production and affects the expression of some biofilm-related genes.

scholarly journals Thermal Stability and Photostability of Satureja montana and Lavandula angustifolia Essential Oils

2021 ◽  
Author(s):  
Ilijana Odak ◽  
Irena Škorić ◽  
Stanislava Talić ◽  
Dragan Škobić
Keyword(s):  
Thermal Stability ◽  
Elevated Temperature ◽  
Essential Oil ◽  
Essential Oils ◽  
Temperature Stress ◽  
Gas Chromatography Mass Spectrometry ◽  
Simultaneous Increase ◽  
Individual Response ◽  
Lavandula Angustifolia ◽  
Satureja Montana

The influence of light and temperature stress conditions and oxygen availability on the chemical composition of Satureja montana and Lavandula angustifolia essential oils is reported. Photostability and thermal stability were evaluated by gas chromatography-mass spectrometry (GC‑MS) analysis, comparing composition before and after the applied regimes. In Satureja montana essential oil, the amount of thymol (13.0-11.9%) and carvacrol (10.3-9.4%) decreased at elevated temperature and in the presence of air, with a simultaneous increase of p-cymene (24.2‑26.2%) while in an inert atmosphere the composition remained the same as in fresh oil. Light caused a dehydrogenation of α-terpinene (2.1-0.9%) and γ-terpinene (5.6‑4.7%) to p-cymene (24.2-25.9%) and decrease of trans-caryophyllene (5.1-4.3%). In Lavandula angustifolia essential oil, compounds sensitive to elevated temperature and the presence of oxygen were cis‑ocimene (2.8-2.2%) and trans‑ocimene (2.6-2.0%), alloocimene (3.0-2.3%), trans‑caryophyllene (4.3-3.6%) and β-farnesene (1.7-1.2%). Irradiated samples showed a decrease in the content of cis-ocimene (2.8-1.9%), alloocimene (3.0‑2.0%), crypton (0.6-0.1%), cuminal (0.3-0.0%), trans‑caryophyllene (4.3-3.5%), β-farnesene (1.7-1.1%) and germacrene-D (0.5-0.1%) and an increase of trans-ocimene (2.6-3.5%), β-bourbonene (0.0-0.2%) and several unidentified peaks. Both oils showed an individual response to light and temperature stress. The absence of oxygen and light is the only storage regime under which the initial composition can be preserved.

Sign in / Sign up

Export Citation Format

Share Document