scholarly journals Effect of plant essential oils on mortality of the stem nematode (Ditylenchus dipsaci)

2009 ◽  
Vol 45 (No. 2) ◽  
pp. 66-73 ◽  
Author(s):  
M. Zouhar ◽  
O. Douda ◽  
D. Lhotský ◽  
R. Pavela
Keyword(s):  
Essential Oils ◽  
Nematicidal Activity ◽  
Thymus Vulgaris ◽  
Aromatic Plants ◽  
Origanum Vulgare ◽  
Medicinal And Aromatic Plants ◽  
Plant Essential Oils ◽  
Nematode Management ◽  
Origanum Compactum ◽  
Ditylenchus Dipsaci

The aim of this study was to assess the nematicidal activity of different essential oils from medicinal and aromatic plants for use in nematode management. Essential oils of <I>Eugenia caryophyllata, Origanum compactum, Origanum vulgare, Thymus matschiana</I> and <I>Thymus vulgaris</I> showed nematicidal activity against <I>Ditylenchus dipsaci.</I>

scholarly journals Ovicidal and Physiological Effects of Essential Oils Extracted from Six Medicinal Plants on the Elm Leaf Beetle, Xanthogaleru-Ca Luteola (Mull.)

Agronomy ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2015
Author(s):  
Bita Valizadeh ◽  
Jalal Jalali Sendi ◽  
Marziyeh Oftadeh ◽  
Asgar Ebadollahi ◽  
Patcharin Krutmuang
Keyword(s):  
Essential Oils ◽  
Artemisia Annua ◽  
Leaf Beetle ◽  
Thymus Vulgaris ◽  
Origanum Vulgare ◽  
Plant Essential Oils ◽  
Artemisia Annua L ◽  
Elm Leaf Beetle ◽  
Synthetic Pesticides ◽  
Xanthogaleruca Luteola

Plant essential oils may serve as safe alternatives to detrimental synthetic pesticides due to relatively lower side effects on the environment and non-targeted organisms. The current study was conducted to investigate the ovicidal toxicity and physiological disruptions of six medicinal plant essential oils, including Artemisia annua L., Lavandula angustifolia Mill., Origanum vulgare L., Rosmarinus officinalis Spenn., Satureja hortensis L., and Thymus vulgaris L., on elm leaf beetle Xanthogaleruca luteola (Mull.). The LC50 (Lethal Concentration to kill 50% of tested insects) values of 122.8, 287.5, 152.8, 180.6, 315.9, and 1366.2 ppm were recorded for T. vulgaris, L. angustifolia, A. annua, S. hortensis, R. officinalis, and O. vulgare, respectively, 72 h after treatment of 3-day-old eggs of the pest. Significant decreases in the amounts of glucose, protein, and triglyceride macromolecules were also observed after treatment. The application of essential oils derived from T. vulgaris, A. annua, and S. hortensis at 400 ppm revealed 100% ovicidal activity. Accordingly, tested essential oils, particularly the essential oil of T. vulgaris, have been promising potential as biorational insecticides in the management of X. luteola.

scholarly journals THE APPLICATION OF ESSENTIAL OILS IN LIVESTOCK AS AN ALTERNATIVE TO FEED ANTIBIOTICS

2021 ◽  
pp. 59-64
Author(s):  
P. N. Miroshnikov ◽  
K. V. Zhuchaev
Keyword(s):  
Essential Oils ◽  
Bacterial Load ◽  
Animal Husbandry ◽  
Climatic Conditions ◽  
Productive Performance ◽  
Aromatic Plants ◽  
Medicinal And Aromatic Plants ◽  
Bactericidal Properties ◽  
Inflammatory Processes ◽  
Different Doses

The applying of antibiotics in animal husbandry leads to the spread of antimicrobial resistant pathogens among domestic animals, which are subsequently transmitted to humans through the food chain. The analysis of literature data on the results of the study of phytochemicals of plant origin in the form of essential oils of medicinal and aromatic plants as one of the possible alternatives to feed antibiotics is presented. Such additives should reduce the incidence of animals by inhibiting pathogenic microflora, provide the animal with a larger amount of energy and nutrients by reducing the bacterial load in the intestine, reduce internal inflammatory processes by improving the immune system, and should be economically beneficial. A review of scientific studies showed that essential oils do have bactericidal properties, but their effect on the productive performance of animals still requires further research. Differences in animal productivity when using essential oils may be due to researchers using different doses, different test conditions (especially climatic conditions), and possible synergistic and antagonistic properties of essential oils with other feed substances. 

scholarly journals Study of Allelopathic Interaction of Essential Oils from Medicinal and Aromatic Plants on Seed Germination and Seedling Growth of Lettuce

Agronomy ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 163 ◽  
Author(s):  
Somayeh Mirmostafaee ◽  
Majid Azizi ◽  
Yoshiharu Fujii
Keyword(s):  
Essential Oils ◽  
Growth Inhibitor ◽  
Lethal Effect ◽  
Inhibitory Effect ◽  
Lettuce Seed ◽  
Aromatic Plants ◽  
Hypocotyl Growth ◽  
Medicinal And Aromatic Plants ◽  
Radicle Growth ◽  
Allelopathic Interaction

Medicinal and aromatic plants have the ability to transmit volatile allelochemicals and affect their surrounding organisms. In this regard, their interaction should also be considered. The inhibitory effects of 112 essential oils on lettuce seed and seedling were investigated by cotton swab method. Germination (G%), Mean germination time (MGT), Lethal of embryo (L%), dormancy (D%), radicle growth (R%), and hypocotyl growth (H%) were measured. Two methods were used for evaluating allelopathic interaction effects: the simplified modified dilution check-board technique (SMCT) and the isobologram. Thymus daenensis had the highest inhibitory effect on G% (IC50 = 2.9 ppm) and the most lethal effect on the embryo (LC50 = 7.2 ppm). Thymus transcaspicus, Dracocephalum moldavica, Artemisia sieberi and Amomum subulatum had the greatest effect on MGT. Ziziphora tenuior, Trachyspermum ammi and Pelargonium graveolens had the highest effect on D%. Origanum vulgare was the strongest growth inhibitor. The highest synergistic effect on G% was in A. subulatum + Mentha suaveolens, on H% was related to Perovskia abrotanoides + T. daenensis, and on R% was observed in Artemisia vulgaris + M. suaveolens. The results of this study can lead to identification of new phytotoxic compounds in EOs and control weeds more effectively.

Nematicidal activity of essential oils from aromatic plants of Morocco

2016 ◽  
Vol 90 (2) ◽  
pp. 711-722 ◽  
Author(s):  
P. Avato ◽  
S. Laquale ◽  
M. P. Argentieri ◽  
A. Lamiri ◽  
V. Radicci ◽  
...  
Keyword(s):  
Essential Oils ◽  
Nematicidal Activity ◽  
Aromatic Plants

scholarly journals Profiling of Essential Oils Components and Polyphenols for Their Antioxidant Activity of Medicinal and Aromatic Plants Grown in Different Environmental Conditions

Agronomy ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 727 ◽  
Author(s):  
Antonios Chrysargyris ◽  
Maria Mikallou ◽  
Spyridon Petropoulos ◽  
Nikolaos Tzortzakis
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Essential Oils ◽  
Environmental Conditions ◽  
Antioxidant Activities ◽  
Added Value ◽  
Total Phenols ◽  
Aromatic Plants ◽  
Medicinal And Aromatic Plants ◽  
Antioxidant Power

In the present study, the yield, the chemical composition, and the antioxidant activities of the essential oils (EOs) of eight medicinal and aromatic plants (MAPs) cultivated under two environmental conditions characterized by a different altitude (namely mountainous and plain) were evaluated. Cultivation at different environmental conditions resulted in significant differences in the chemical composition and antioxidant activity for most of the studied species. In particular, high altitudes resulted in increased phenolic compounds’ content and antioxidant activity for artemisia plants, while specific parameters increased in the case of spearmint (total phenols) and rosemary (flavonoids). In contrast, in pelargonium, all the tested parameters were positively affected in the plain area, whereas, for laurel and sage, only flavanols remained unaffected. EO yield in mountainous pelargonium and spearmint decreased while, in mountainous laurel, pelargonium and spearmint increased when compared to plain areas. In addition, the major EO constituents’ content for most of the species were affected by environmental conditions. The 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) and ferric reducing antioxidant power (FRAP) were variably correlated with total phenols, flavonoids, and flavanols, depending on the species and the altitude. Lastly, in limited cases, antioxidant activity (DPPH or FRAP values) was positively correlated with some EO components (e.g., borneol and β-pinene in artemisia and laurel plants grown in the plain, respectively, or 1,8-cineole in mountainous grown verbena plants). In conclusion, environmental conditions (altitude) affected antioxidants’ content and EO yield and composition of the studied MAPs. These findings can be used to introduce cultivation of MAPs in specific ecosystems for the production of high added value products.

A study of the synergistic antilisterial effects of a sub-lethal dose of lactic acid and essential oils from Thymus vulgaris L., Rosmarinus officinalis L. and Origanum vulgare L.

2007 ◽  
Vol 104 (2) ◽  
pp. 774-782 ◽  
Author(s):  
Suzana I. Dimitrijević ◽  
Katarina R. Mihajlovski ◽  
Dušan G. Antonović ◽  
Mirjana R. Milanović-Stevanović ◽  
Dušan Ž. Mijin
Keyword(s):  
Lactic Acid ◽  
Essential Oils ◽  
Lethal Dose ◽  
Rosmarinus Officinalis ◽  
Thymus Vulgaris ◽  
Origanum Vulgare ◽  
Rosmarinus Officinalis L

scholarly journals Absolute Antioxidant Activity of Five Phenol-Rich Essential Oils

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5237
Author(s):  
Yafang Guo ◽  
Romeo Pizzol ◽  
Simone Gabbanini ◽  
Andrea Baschieri ◽  
Riccardo Amorati ◽  
...  
Keyword(s):  
Essential Oils ◽  
Antioxidant Activities ◽  
Oxygen Uptake Kinetics ◽  
Butylated Hydroxytoluene ◽  
Thymus Vulgaris ◽  
Origanum Vulgare ◽  
Cinnamomum Zeylanicum ◽  
Radical Trapping ◽  
Chain Breaking ◽  
Kinetics Of

Essential oils (EOs) have promising antioxidant activities which are gaining interest as natural alternatives to synthetic antioxidants in the food and cosmetic industries. However, quantitative data on chain-breaking activity and on the kinetics of peroxyl radical trapping are missing. Five phenol-rich EOs were analyzed by GC-MS and studied by oxygen-uptake kinetics in inhibited controlled autoxidations of reference substrates (cumene and squalene). Terpene-rich Thymus vulgaris (thymol 4%; carvacrol 33.9%), Origanum vulgare, (thymol 0.4%; carvacrol 66.2%) and Satureja hortensis, (thymol 1.7%; carvacrol 46.6%), had apparent kinh (30 °C, PhCl) of (1.5 ± 0.3) × 104, (1.3 ± 0.1) × 104 and (1.1 ± 0.3) × 104 M−1s−1, respectively, while phenylpropanoid-rich Eugenia caryophyllus (eugenol 80.8%) and Cinnamomum zeylanicum, (eugenol 81.4%) showed apparent kinh (30 °C, PhCl) of (5.0 ± 0.1) × 103 and (4.9 ± 0.3) × 103 M−1s−1, respectively. All EOs already granted good antioxidant protection of cumene at a concentration of 1 ppm (1 mg/L), the duration being proportional to their phenolic content, which dictated their antioxidant behavior. They also afforded excellent protection of squalene after adjusting their concentration (100 mg/L) to account for the much higher oxidizability of this substrate. All investigated EOs had kinh comparable to synthetic butylated hydroxytoluene (BHT) were are eligible to replace it in the protection of food or cosmetic products.

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