scholarly journals Growth and development of phytopathogenic micromycetes under the influence of a mixture of essential oils

2020 ◽  
pp. 193-198
Author(s):  
I. Beznosko ◽  
N. Kosovska ◽  
V. Mineralova ◽  
V.V. Kozin ◽  
O. Mineralov

The creation a new biological preparations on based vegetable oils is a promising direction in improving the efficiency organic production a plant products in Ukraine. Their ecological expediency consists in safety for the person, environment, animals, entomophagous that gives the chance to receive ecologically safe production. It was studied the sensitivity a phytopathogenic fungi Fusarium graminearum, Alternaria alternata, Trichodérma víride to essential oils of basil and cinnamon. It is showed that the essential oils of basil and cinnamon are inhibit the growth, the development and sporulation phytopathogenic fungi Fusarium graminearum, Alternaria alternata, Trichodérma víride at an environmentally safe level. This indicates their high prospects in the creation the biological products for use in organic production, which will reduce the cost of plant raw materials and improve its quality.

2021 ◽  
pp. 13-18
Author(s):  
М.А. Сенченко ◽  
М.В. Степанова

В России при производстве национальных напитков и продуктов питания используют сырьё растительного происхождения. Многие участки для возделываемых культур расположены вблизи урбанизированных районов, нефтеперерабатывающих и машиностроительных заводов. Исследования посвящены определению тяжёлых металлов в почвах урбанизированных и сельских районов Ярославской области и проведены в 2019–2020 гг. Целью данного исследования является определение содержания некоторых микроэлементов и тяжёлых металлов в почве, ревене и продукте его переработки – квасе, произведённом разными способами (рассматривались 2 технологии: технология с дополнительной операцией «вымачивание стеблей ревеня» и «настаивание стеблей ревеня и дополнительных ингредиентов» и технология с дополнительной операцией «варка стеблей ревеня и дополнительных ингредиентов»). При исследовании загрязнения почвы микроэлементами и тяжёлыми металлами на всех территориях превышения предельно допустимых концентраций не выявлено. Установлено, что по величине среднего содержания в водной вытяжке почвы исследуемые элементы на всех рассмотренных территориях региона образуют следующий убывающий ряд: железо > свинец > цинк > медь > мышьяк > кадмий. Более высокие концентрации цинка, железа, кадмия, свинца и мышьяка выявлены в урбанизированной территории, а меди – в сельской территории. Анализ миграционной способности элементов в системе «почва – растение – продукция растительного происхождения» показал наличие плохой миграционной способности для цинка и железа. Использование растительного сырья, произведённого по технологии органического производства и по разработанной технологии переработки растительного сырья, способствовало наименьшему воздействию на его составные части, увеличению содержания макро- и микроэлементов. При этом содержание токсичных элементов остаётся в пределах действующих нормативных документов. Технология, включающая дополнительную операцию «варка», обеспечила наибольшую экстракцию макро- и микроэлементов из ревеня в квас. In Russia, raw materials of plant origin are used in the production of national beverages and food products. Many areas for cultivated crops are located near urbanized areas, oil refineries and mechanical engineering plants. Researches are devoted to the definition of heavy metals in soils of urbanized and rural areas of the Yaroslavl region and were carried out in 2019–2020. The purpose of this study is to determine the content of some microelements and heavy metals in soil, rhubarb and its processing product – kvass produced in various ways (2 technologies were considered: technology with an additional operation "soaking rhubarb stems" and "infusing rhubarb stems and additional ingredients" and technology with an additional operation "boiling rhubarb stems and additional ingredients"). When investigating soil contamination with microelements and heavy metals in all territories, no excess of maximum permissible concentrations was found. It was established that in terms of the average content in the water extract of the soil, the examined elements in all the considered territories of the region form the following decreasing series: iron > lead > zinc > copper > arsenic > cadmium. Higher concentrations of zinc, iron, cadmium, lead and arsenic were found in urbanized territory, and copper in rural territory. An analysis of the migration ability of elements in the system "soil – plant – product of plant processing" showed the presence of poor migration ability for zinc and iron. The use of plant raw materials produced according to the organic production technology and the developed technology for processing plant raw materials contributed to the least impact on its components, an increase in the content of macro- and microelements. At the same time, the content of toxic elements remains within the limits of existing regulatory documents. The technology, including an additional "boiling" operation, ensured the greatest extraction of macro- and microelements from rhubarb to kvass.


2010 ◽  
Vol 65 (7-8) ◽  
pp. 437-439 ◽  
Author(s):  
Hui Xu ◽  
Qin Wang ◽  
Wen-Bin Yang

Nine indole derivatives were evaluated in vitro against Fusarium graminearum, Alternaria alternata, Helminthosporium sorokinianum, Pyricularia oryzae, Fusarium oxysporum f. sp. vasinfectum, Fusarium oxysporum f. sp. cucumarinum, and Alternaria brassicae. Most of the compounds were found to possess antifungal activities. Especially compounds 2, 5, 8, and 9 exhibited broad-spectrum antifungal activities against the above-mentioned seven phytopathogenic fungi, and showed more potent activities than hymexazole, a commercial agricultural fungicide.


2010 ◽  
Vol 65 (7-8) ◽  
pp. 433-436
Author(s):  
Hui Xu ◽  
Huan Qu

Several 2,6-bis-(un)substituted phenoxymethylpyridines were synthesized and evaluated in vitro against Fusarium graminearum, Helminthosporium sorokinianum, Alternaria brassicae, Alternaria alternata, and Fusarium oxysporum f. sp. vasinfectum. Among all derivatives, compound 3 a exhibited a broad-spectrum antifungal activity against the five phytopathogenic fungi.


2013 ◽  
Vol 68 (3-4) ◽  
pp. 77-81 ◽  
Author(s):  
Huan Qu ◽  
Rui Zhang ◽  
Ying Hu ◽  
Yazhen Ke ◽  
Zhinan Gao ◽  
...  

4j A series of 2-(N-arylsulfonylindol-3-yl)-3-aryl-1,3-thiazinan-4-one derivatives were synthesized and evaluated in vitro against seven phytopathogenic fungi, namely Fusarium graminearum, Alternaria solani, Fusarium oxysporium f. sp. vasinfectum, Alternaria brassicae, Valsa mali, Alternaria alternata, and Pyricularia oryzae. Among all derivatives, especially compound exhibited a potential antifungal activity against four phytopathogenic fungi.


Pharmaceutics ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 327
Author(s):  
Cinzia Cimino ◽  
Oriana Maria Maurel ◽  
Teresa Musumeci ◽  
Angela Bonaccorso ◽  
Filippo Drago ◽  
...  

Essential oils are being studied for more than 60 years, but a growing interest has emerged in the recent decades due to a desire for a rediscovery of natural remedies. Essential oils are known for millennia and, already in prehistoric times, they were used for medicinal and ritual purposes due to their therapeutic properties. Using a variety of methods refined over the centuries, essential oils are extracted from plant raw materials: the choice of the extraction method is decisive, since it determines the type, quantity, and stereochemical structure of the essential oil molecules. To these components belong all properties that make essential oils so interesting for pharmaceutical uses; the most investigated ones are antioxidant, anti-inflammatory, antimicrobial, wound-healing, and anxiolytic activities. However, the main limitations to their use are their hydrophobicity, instability, high volatility, and risk of toxicity. A successful strategy to overcome these limitations is the encapsulation within delivery systems, which enable the increase of essential oils bioavailability and improve their chemical stability, while reducing their volatility and toxicity. Among all the suitable platforms, our review focused on the lipid-based ones, in particular micro- and nanoemulsions, liposomes, solid lipid nanoparticles, and nanostructured lipid carriers.


Biljni lekar ◽  
2021 ◽  
Vol 49 (2) ◽  
pp. 178-187
Author(s):  
Nikola Laćarac

Some plants contain various substances that have pesticidal properties. Since these substances are extracted from plants they are called botanical pesticides. Botanical pesticides can be used as fungicides, bactericides, viricides, herbicides, insecticides, nematicides and rodenticides. Essential oils and plant extracts are most commonly used as botanical pesticides. In the past few years, we have witnessed a tendency to reduce the use of conventional pesticides and for that reason more and more attention is paid to the testing and application of essential oils and plant extracts for this purpose. These compounds have a number of advantages over conventional pesticides, especially when it comes to preventing the occurrence of diseases caused by phytopathogenic bacteria and phytopathogenic fungi as the most common and most important causes of plant diseases. Plant extracts and essential oils can be used at a time when the application of conventional pesticides is impossible due to the observance of the waiting period, and they are also a significant weapon in integrated and organic production concept.


Author(s):  
Kubasova E.D. ◽  
Korelskaya G.V. ◽  
Kubasov R.V.

The Medicinal Lovage (Levisticum Officinale) grows almost everywhere. In order to use Levisticum Officinale in economic needs, including in medicine, a number of countries are specially engaged in its cultivation. The analysis of the scientific literature revealed a large number of publications confirming the diverse chemical spectrum of rhizomes, roots and herbs of the medicinal lovage. In this regard, it is used as a medicinal raw material and is included in a number of European Pharmacopoeias. For medical purposes, all parts of this plant that contain biologically active substances can be used. Levisticum officinale contains various phytochemical compounds and secondary metabolites – terpenoids, flavonoids, essential oils, phthalides, polyacetylenes, coumarins, phenylpropanoids, alkaloids, tannins, phenolic acids, polyacetylenes. All of them have properties that can have a therapeutic effect on the organism. The composition of essential oils of Levisticum Officinale is the most studied. It is mainly represented by monoterpene hydrocarbons, sexwiterpenes and phthalides. There are some differences in the chemical composition of Levisticum Officinale. Most scientists agree that such a discrepancy may be related to the period and process of harvesting plant raw materials, age, genotype of the plant, climatic conditions and place of growth, as well as the method of extraction and the method of identification and quantitative determination of biologically active substances. Therefore, there is a problem of a single universal system of preparation and further use of raw materials. The development of modern methods for analyzing the raw materials of lovage and the study of its chemical composition creates prerequisites for expanding its use as a medicinal plant.


Author(s):  
V. S. Sibirtsev ◽  
U. Yu. Nechiporenko ◽  
V. L. Kabanov ◽  
M. Yu. Kukin

A biotesting technique is described that provides for periodic (every 2 hours) recording of changes in pH, redox potential, and electrical conductivity of a liquid culture medium incubated in the presence and in the absence of viable test microorganisms (TM) and test samples (TS). The results of a comparative analysis using this technique of antibiotic activity against Staphylococcus aureus of different concentrations of «essential oils» obtained from 10 types of plant raw materials are presented. Based on this, we can conclude the following. Using the presented methodology, it is possible to assess the effect on the dynamics of the vital activity of TM of samples of various pharmaceutical, cosmetic, food, feed and other products, much more quickly, objectively and informatively than using standard visual methods of microbiological testing. The initial antibiotic activity of TS in most cases was greater than their prolonged antibiotic activity. At the same time, the mid-term (in terms of the time of interaction of TS with TM) antibiotic activity of TS was usually intermediate in value between their initial and prolonged biological activity.


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