Wyniki wyszukiwania - BazTech

1

Effects of essential oils on in vitro growth of fungi Cladobotryum dendroides and Mycogone perniciosa infecting button mushroom

Górski Romuald, Dorna Hanna, Rosińska Agnieszka, Szopińska Dorota, Kałużewicz Alina

Ecological Chemistry and Engineering. S

|

2021

|

Vol. 28, nr 3

411--427

EN

The aim of the studies was to investigate the effect of camel grass, lavender, patchouli, peppermint and tea tree essential oils, and their mixtures on the in vitro growth of pathogenic fungi Cladobotryum dendroides and Mycogone perniciosa, occurring in the cultivation of button mushroom (Agaricus bisporus). The mycelial growth of the tested pathogens was evaluated on PDA medium. Essential oils were added in three doses: 0.25; 0.5 and 1 mg·cm–3 of PDA medium. Camel grass and peppermint essential oils applied at the highest dose inhibited completely the in vitro growth of C. dendroides mycelium. Lavender oil used at the amount of 1 mg·cm–3 reduced the growth of the pathogen by 90 %. In the case of M. perniciosa the complete inhibition of the pathogen’s growth was observed after the addition of camel grass oil to PDA medium, irrespective of a dose, and lavender oil at the doses of 0.5 and 1 mg·cm–3. The efficacy of the tested mixtures against M. perniciosa was high. Generally, all mixtures of essential oils, irrespective of a dose, completely controlled the growth of the pathogen. The complete inhibition of the growth of C. dendroides was observed only on the medium with the addition of the mixture of camel grass and peppermint oils at the highest dose. The conducted research showed that natural essential oils due to their antifungal properties could be useful in the Integrated Disease Management for the protection of button mushroom against diseases. They could be an effective alternative to synthetic chemical fungicides.

2

The effect of hemp essential oil on mortality Aulacorthum solani Kalt. and Tetranychus urticae Koch

Górski R., Sobieralski K., Siwulski M.

Ecological Chemistry and Engineering. S

|

2016

|

Vol. 23, nr 3

505--511

EN

Investigations concerning the effect of hemp oil on mortality of the foxglove aphid (Aulacorthum solani Kalt.) and the two spotted spider mite (Tetranychus urticae Koch) were conducted in the years 2014-2015. The tested essential oil was produced at the Institute of Natural Fibers and Medicinal Plants in Poznan. It was obtained by steam distillation of fresh panicles of Polish hemp cultivars, Beniko, Bialobrzeskie and Silesia, with low cannabinoid contents, including THC (max. 0.2% plant fresh matter). The effect of essential oil on the investigated pests was determined following the application of aqueous emulsion solution at 0.02, 0.05 and 0.1%. Mortality of agrophages was determined 24, 48 and 72 h after treatment. In this study a very high efficacy of the essential oil produced from hemp panicles was found in the reduction of population size of the foxglove aphid (A. solani). Already at 24 h after its application at a concentration of 0.1% pest mortality rate was 98.20%, while after 48 h it reached 100%. A significant, although much lesser effect of oil on the aphid population was recorded when applying it at 0.05%, with the mortality rate of the true bug after 72 h amounting to 57.33%. Essential oil also showed an effect on the two spotted spider mite (T. urticae). Following the oil application, irrespective of its concentration, a significant effect on mite mortality was observed. Its action was the strongest at its highest concentration, ie 0.1%, while mortality of the pest at 24, 48 and 72 h after treatment was 83.28, 95.83 and 98.72%, respectively.

3

Usefulness of natural essential oils in the control of foxglove aphid (Aulacorthum solani Kalt) occurring on eggplant (Solanum melongena L)

Górski R., Tomczak M.

Ecological Chemistry and Engineering. S

|

2010

|

Vol. 17, nr 3

345-349

EN

The purpose of the study was to determine the efficacy of natural essential oils, such as basil oil, citronella oil, eucalyptus oil, juniper oil and patchouli oil, in the control of foxglove aphid (Aulacorthum solani Kalt.) occurring on eggplant. The above-mentioned oils were used at concentrations of 0.02, 0.05 and 0.10%. The mortality of pest was evaluated 24, 48 and 72 hours after treatment. After application of citronella oil and patchouli oil at a concentration of 0.05 and 0.10% and juniper oil at 0.10%, 100% mortality of A. solani was observed. In the remaining combinations with the use of tested essential oils mortality amounted to 24.63÷89.40% (72 hours after treatment).

PL

Celem badań było określenie skuteczności naturalnych olejków eterycznych, takich jak: bazyliowy, cytronelowy, eukaliptusowy, jałowcowy i paczulowy w zwalczaniu mszycy ziemniaczanej (Aulacorthum solani Kalt.), występującej na oberżynie. Wyżej wymienione olejki stosowano w stężeniach 0,02; 0,05 i 0,10%. Śmiertelność szkodnika określono po 24; 48 i 72 godzinach po zabiegu. Po zastosowaniu olejków: cytronelowego i paczulowego o stężeniach 0,05 i 0,10% oraz jałowcowego - 0,10% zanotowano 100% śmiertelność A. solani. W pozostałych kombinacjach z użyciem testowanych olejków śmiertelność wynosiła 24,63÷89,40% (72 godziny po zabiegu).

4

Effect of selected natural essential oils on in vitro development of fungus Trichoderma harzianum found in common mushroom (Agaricus bisporus) cultivation

Górski R., Sobieralski K., Siwulski M., Góra K.

Ecological Chemistry and Engineering. S

|

2010

|

Vol. 17, nr 2

177-185

EN

Investigations on the effect of selected natural essential oils on the development (mycelium growth and sporulation) of fungus Trichoderma harzianum found in common mushroom (Agaricus bisporus) growing were conducted in 2008 at the Department of Plant Protection Methods, the Poznan University of Live Sciences. The following natural essential oils were analyzed: coriander oil (Coriandrum sativum), manuka oil (Leptospermum scoparium), lavender oil (Lavandula officinalis), peppermint oil (Mentha piperita) applied at concentrations of 250, 500 and 1000 žg/cm3 of potato dextrose agar (PDA medium produced by Merck Co.). All essential oils used in the analyses were produced by "Pollena Aroma" Co. in Warsaw. The control combination was potato dextrose agar with no oils added. A strong inhibitory action reducing in vitro growth of Trichoderma harzianum was recorded in case of manuka oil at a concentration of 500 and 1000 žg/cm3 PDA. Inhibition of fungal growth was statistically significant and 4 days after medium inoculation it amounted to 67.4 and 64.7% in relation to the control, respectively. After application of all tested natural essential oils sporulation of the fungus was significantly reduced at 6 days after medium inoculation, by 50.2÷99.9%.

PL

Badania nad wpływem wybranych naturalnych olejków eterycznych na rozwój (wzrost grzybni i zarodnikowanie) grzyba Trichoderma harzianum występującego w uprawie pieczarki dwuzarodnikowej (Agaricus bisporus) przeprowadzono w 2008 roku w Katedrze Metod Ochrony Roślin Uniwersytetu Przyrodniczego w Poznaniu. Przetestowano następujące olejki eteryczne: kolendrowy (Coriandrum sativum), manuka (Leptospermum scoparium), lawendowy (Lavandula officinalis), mięty pieprzowej (Mentha piperita), które dodawano do pożywki ziemniaczano-glukozowej (pożywka PDA firmy Merck), w stężeniach 250; 500 i 1000 žg/cm3. Wszystkie badane olejki eteryczne były produkowane przez firmę "Pollena Aroma" z Warszawy. Kombinację kontrolną stanowiła pożywka PDA bez dodatku olejków. Stwierdzono silne działanie inhibujące wzrost Trichoderma harzianum po zastosowaniu olejku manuka w koncentracji 500 i 1000 žg/cm3 PDA. Zahamowanie wzrostu grzybni było statystycznie istotne i po 4 dniach od inokulacji pożywki wynosiło ono w stosunku do kontroli odpowiednio 67,4 i 64,7%. Po zastosowaniu wszystkich testowanych olejków eterycznych zaobserwowano znaczącą redukcję zarodnikowania, wynoszącą w 6 dniu od inokulacji pożywki 50,2÷99,9%.

5

Aktywność biologiczna w stosowanych w aromatach spożywczych

Brud W.

Przemysł Spożywczy

|

2000

|

T. 54, nr 4

14-15

PL

Naturalne olejki eteryczne należą do głównych składników aromatów spożywczych. Ich właściwości smakowe są powszechnie znane i doceniane. Ograniczona jest natomiast wiedza zarówno producentów żywności jak i konsumentów o wpływie olejków eterycznych na psychikę człowieka oraz o ich właściwościach terapeutycznych i konserwujących. Współczesny przemysł spożywczy w niewielkim stopniu i bardzo powoli wykorzystuje tę wiedzę, która jest podstawą jednej z najszybciej rozwijających się dziedzin medycyny naturalnej - aromaterapii, w której jedynymi środkami terapeutycznymi są naturalne roślinne olejki eteryczne.

EN

Natural essential oils are most important part of food flavours. Their flavouring properties are widely known and appreciated. At the same time knowledge of influence of essential oils on human psyche and behaviour as well as their therapeutic and preservative properties is very limited among food manufacturers and consumers. Very slowly contemporary food industry is using achievements of aromatherapy - a natural medicine method which is based on biological activity of natural plant essen-tial oils.