North-East Of Ukraine Research Articles

New Spider Species of Cnephalocotes and Peponocranium (Aranei, Linyphiidae) from the North-East of Ukraine

Two species of the genera Cnephalocotes Simon, 1884 and Peponocranium Simon, 1884: Cnephalocotes similis sp. n. and Peponocranium fallax sp. n. (Linyphiidae) from the north-eastern Ukraine are described and illustrated.

Acorn production of pedunculate oak in northeast of Ukraine

Abstract We analysed the quantity and quality of Quercus robur L. acorns after years with a very poor yield under the canopy of natural oak stands of various compositions, ages and stock densities in the northeastern part of Ukraine. We determined the mass of 1,000 healthy and damaged acorns of the current year. The levels of variability were estimated for the number and mass of acorns under the canopy of the studied stands. The dependences of the number of acorns on the age of oak stands and their stock density were studied. The total number of acorns under the canopy of natural oak stands was 9,900–19,000 seeds per hectare with a total mass of 26.8–54.1 kg per hectare in 2020 and 8,600–17,200 seeds per hectare with a total mass of 22.7–48.4 kg per hectare in 2021. The proportion of damaged acorns was about 70% both in 2020 and 2021. The largest number of acorns was concentrated under healthy trees (without signs of decline) that had a well-developed crown and, therefore, received more sunlight and heat. The identified quantitative and qualitative estimates and acorn spreading pattern need to be considered when selecting sites for further natural seed regeneration in old-aged oak stands.

Solitary bees — pollinators of seed alfalfa in the north-east of Ukraine: current state and use in pollination

The data on the species composition of seed alfalfa pollinators, their trophic links, seasonal dynamics, and influence on alfalfa seed productivity were generalized. Among 47 solitary bee species of 15 genera and 6 families, 8 species comprised 87.9% of all bees visiting alfalfa flowers. These species have the highest abundance from the second half of June to the third decade of July, which coincides with the yellow alfalfa flowering after moving at the beginning of the budding stage. The average degree of pollination of alfalfa flowers was 25.4%, which delivers an average of 7.6 centner/ha of actual seed yield in commercial crops

Digitalization as a direction of innovative development of Ukrainian universities in the conditions of technological transformations

The article is devoted to determining the prospects of digitalization as a direction of innovative development of Ukrainian universities in the conditions of technological transformations to solve the problems caused by them in the market of scientific and educational services, as well as to develop on this basis, an approach to the justification of relevant, innovative projects. The motivational reasons for the digitalization of the university as a way of its response to technological transformations are outlined and systematized according to the areas of activity. The prerequisites and specifics of the accelerated digitization of Ukrainian universities in the conditions of quarantine restrictions of COVID-19 and war and post-war recovery are determined. An analysis of the practice of using digital technologies in the educational process of some departments of universities in the North-East of Ukraine, operating in the front-line zone, was carried out. The authors clarified the digital structure of the university and the scheme of interaction of its subsystems in the digital economy in the conditions of technological transformations. In particular, in terms of determining the characteristics of external and internal channels of information and knowledge, the interaction initiates innovative changes in the university's activities through digitalization. An approach to the analysis and substantiation of the expediency of the implementation of innovative development projects of the university has been developed depending on the level of its readiness for digitalization. The authors formed a system of indicators for its evaluation, by analogy with the Network Readiness Index, which characterizes various aspects of the university's digital readiness to implement innovative development projects. In particular: technological, human, and managerial aspects of digital readiness, as well as its expected effectiveness (usefulness). The obtained results develop the principles of innovation management in the field of higher education, in terms of the development and justification of the approach to the management of digitalization of the university, as a prerequisite for its innovative development in the conditions of technological transformations and the formation of the digital economy.

The memoir image of Kharkiv in the 1920s and 1930s in Ukrainian memoir literature of the twentieth century

The article is devoted to the study of the memoir image of Kharkiv in the twenties and thirties of the last century in Ukrainian memoir literature. Kharkiv is a large city in the north-east of Ukraine, which in 1923 became the capital of Ukraine, absorbing the best of what was then in Ukraine, and a major industrial, economic, scientific, cultural, and educational centre. The city is actively developing. New architectural landmarks in the style of constructivism are appearing. The city, on the one hand, had a powerful state apparatus that controlled all spheres of the country's life, and on the other hand, it had an active development of free intellectual and cultural life. The city of that time quickly received its own memoir biography, and its appearance and specifics of inner life became the subject of numerous memoir reflections. In particular, the memoirs, autobiographies, autobiographical novels, and novels of Dmytro Bahalii, Ostap Vyshnia, Mykhailo Hrushevskii, Dokiia Humenna, Volodymyr Gzhytskii, Mike Johansen, Volodymyr Kulish, Vasyl Mynko, Valerian Polishchuk, Yurii Smolych, Vasyl Sokil, Volodymyr Sosiura, and Yurii Shevelev are the subject of this study. Some of the autobiographers (such as Mike Johansen and Yurii Shevelev) were native Kharkiv residents, while others (such as Volodymyr Gzhytskyi, Dokiia Humenna, Vasyl Mynko, Yurii Smolych, Vasyl Sokil, and Volodymyr Sosiura) came to Kharkiv when it became the capital of Ukraine, so the memoir portrait of the city is written both in its evolution and from the standpoint of first perception and understanding/misunderstanding. The memoir literary maps the city, paying much attention to its literary and artistic loci, often mentioned are the quarter with the conventional name Literary Fair, the Blakytnyi House, the Peasant House, the Berezil Theatre, and the Slovo House. Since 1931, the city's life has changed dramatically, with mass arrests and high-profile court cases, such as the SVU trial in the Kharkiv Opera House. In 1934, the capital of Ukraine was moved to Kyiv, and Kharkiv continues to develop as a powerful industrial, scientific, and intellectual centre.

Applying of Plants to Regulate Mycobiota of Winter Wheat Seeds

Plants, having a wide array of different substances that are natural to ecosystems, can be effective biofungicides. Most scientific studies have demonstrated the effectiveness of plant extracts against certain phytopathogenic species/genera in vitro. These results do not provide an answer to how certain substances might affect the systems of microorganisms. The aim of the work was to study the influence of plants on isolation of mycobiota representatives of winter wheat seeds, the peculiarities of its germination and seedling development. The mycocomplex of the seeds of the 2017 and 2019 harvests from the North-East of Ukraine was studied. The seeds were kept in aqueous plant solutions and spread on potato-glucose agar. The effects of Citrus sinensis L., Citrus limon L., Zingiber officinale Roscoe, Larix decidua Mill., and Pinus sylvestris L. were evaluated. All plant solutions changed the quantitative and qualitative composition of seed mycobiota. The negative effect of soaking seeds on the development of wheat seedlings was established, which will not allow them to be used to regulate the seed mycocomplex in the future. C. limon (67%) and Z. officinale (on average 52%) most effectively reduced the number of dominant Alternaria sp. Seed treatment increased the number of fungal colonies compared to the control, except for the 40% ginger solution, and when ginger was used, the spectrum of fungi was expanded, and when citrus and pine were used, it was narrowed. Plant solutions changed the dominance of Alternaria sp. in the seed mycobiota on the prevalence of Penicillium sp. and Aureobasidium pullulans (de Bary) G. Arnaud. The mycobiota of wheat seeds acquired the most significant changes under the influence of L. decidua and P. sylvestris

Політуха сибірська (Pteromys volans) на півдні Східної Європи: межі поширення та їх зміни

Information on the former and current distribution of the Siberian flying squirrel on the plains of Eastern Europe was analysed, with special attention to the south-western segment of the species range, which in ancient times entered the territory of Ukraine (in the sense of its modern borders). The study, as a starting point of analysis, is based on the reports of researchers of the 18th and 19th centuries (mainly J. Güldenstedt and D. Bagaliy), repeated in a number of later publications, about the findings of the species in Sumy Oblast and its probably wider distribution in Polissia, in the Forest Steppe, or even in Podillia. Detailed descriptions of all former and modern records of the species with a cadastre of locations are given. This cadastre covers the entire south-western segment of the area, including the Dnipro and Volga basins. Information on finds of the species in the region is summarized in two sets of data, before and after 1960; they are all marked on the respective maps. The points of finds of the species are unevenly distributed, which may indicate unequal availability of data from different regions. However, the author believes that such unevenness is related to the peculiarities of the distribution of the species, since the absence of the species was shown for some of the locations in the data-absence zones, despite its detailed searches, and the dynamics of distribution limits were shown for some places. The south-western segment of the range of the flying squirrel can be described as a continuous wedge, in which the south-western border runs through the territory of Belarus along its north-eastern borders and the corresponding parts of neighbouring countries, through Polotsk, Baran, further along the border from the Russian Federation to Trubchevsk and further to the Bryansk Forest reserve, which is the southernmost location of the species. The eastern border of this segment goes to the Volga, reaching it in the area of Nizhny Novgorod, however, data indicate a large winding of the range boundary in this part to the north, to Safonovo, Rzhev, Mozhaisk, Obninsk, Pushchino and further to Ryazan. In Pushchino, the species is listed as an introducer. This loop of geographic range may indicate the isolated status of the western segment, from Berezina in the west to Desna in the east. It is assumed that this area of the range was formed as a result of the recent (15–18 centuries) expansion of the distribution limits of the species and their new reduction over the last 100 years (19–20 centuries), with a rate of reduction of about 100–160 km per century. There is a high the probability of finding the species in the north-east of Ukraine.

Distribution and harmfulness of Mordellistena parvuliformis Beetle in the left Bank Steppe of Ukraine

Harmfulness and spread of a new dangerous pest of Mordellistena parvuliformis Stshegol.-Bar, 1930 have been recorded in the north-east of Ukraine. The results of researches of the reasons of occurrence, harmfulness and distribution of this dangerous pest of sunflower are generalized.
 It was found that the larvae of the sunflower Mordellistena parvuliformis from the diapause occur from the end of the third decade of April after feeding on dead stem tissue. Depending on the time of hatching, the presence of pupae is observed until the end of May. From the third decade of May, you can see the flight of adults and after a short additional feeding on flowering vegetation — the beginning of mating. Adult flight lasts a little more than 1.5 months — until the second decade of July. Embryonic development lasts about two weeks. The last eggs laid were observed in early August. From the second decade of June there was a revival of larvae, which are in an active state inside the stems until mid-September until the end of feeding and transition to a state of rest for further wintering. Thus, the development of one complete generation of toadstools per year is established.

Local taxonomic spectra in plants, animals, fungi and terrestrial protists show common mathematical patterns

Taxonomic spectra, i.e. relations between supraspecific taxa by the number of included species, remain poorly understood in aspect of the mathematical properties. We studied taxonomic spectra of plants (Magnoliophyta, Bryophyta), animals (Coleoptera, Aves), fungi (Agaricomycetes) and terrestrial protists (Myxomycetes), found in the Homilsha Forests National Nature Park (North-East of Ukraine), and concluded that they correspond to the hollow-curve distribution at the level of genera, families and orders. The spectra of most taxa, as shown by the Akaike information criterion, are closely approximated by the log-series distribution model at all taxonomic levels. This type of distribution is typical for the species abundance curves, based on collections made from small areas. At the same time, in the genera–families–orders row the similarity to the lognormal distribution increases. The central values and variability vary considerably between different taxonomic groups and ranks, however, without affecting the type of distribution. The number of orders in all taxa except Bryophyta has reached the saturation and coincides with the curve of the estimated number of orders according to the Chao1 coefficient. For families and especially genera the correspondence with estimated number of species is much lower. Our results do not confirm the assumption that hollow-curve distributions of taxonomic spectra result from the artificial fragmentation of taxa. These distributions neither depend on the insufficient knowledge about the species composition at the locality, nor reflect the size of the studied area. The presence of such distributions in both local and global biota of different groups may be explained by the common features of their evolution, especially by the existence of relict orphan groups. The fact that in Homilsha Forests the kurtosis and skewness of distributions decreases in the genera–families–orders row can therefore be explained by the relatively low percentage of the high-rank orphan taxa in the local biota. This may be a common feature of communities studied at small geographical scale, since orphan taxa often demonstrate a high level of endemism. Comparative studies of local communities from different climate zones may help to understand how universal are the patterns, described herein.

Influence of seed treatment on microbiota and development of winter wheat seedlings

The microbiota of winter wheat seeds from the North-East of Ukraine was studied by a biological method. Its considerable variability is established over three years (2017–2019). The effect of the treatment agents on most microorganisms of wheat seed microbiota in Ukraine, rather than on its genera and species, is shown. It has been proven that fungicides deleted some species and did not affect the development of others. Chemicals replaced some species or genera of fungi with others or even other microorganisms. Biological seed treatment (Phytosporin-M) has caused less microbiota change than chemical treatment (Maxim 0.25 FS, Rostock, Kinto Duo). Fungicides have replaced the dominance of Alternaria spp. (2017 – 57.8%, 2018 – 63.5%) for the dominance of yeast (Rostock – 54%) and Aureobasidium pullulans (Maxim 0.25 FS – 84.2%) in 2017, bacteria (Maxim 0.25 FS – 72.3%, Rostock – 53.8%) – in 2018. A. pullulans dominated in the microbiota of winter wheat seeds in 2019. The highest amount of A. pullulans was noted for the treatment of seeds by Phytosporin-M (85.9%). The biological seed treatment reduced the amount of Nigrospora spp. and Alternaria spp. Several times (3 and 5, respectively), chemical agents did not give Nigrospora spp. germination reduced the amount of A. pullulans, Alternaria spp. in 2019. Maxim 0.25 FS, Rostock 50%, and Kinto Duo delayed seed germination and seedling development on agar medium and soil, whereas Phytosporin-M – on the contrary, promoted the growth of seedlings and significantly exceeded control.

Definitions of antibodies to the newcastle disease virus in the yolk of birds of artificial nesting box in conditions of the North-East of Ukraine

Introduction. In the conditions of the North-East of Ukraine, the circulation of the newcastle disease virus in hollow-nesting birds of artificial nests box was studied. Serological studies of the yolks of eggs collected from hollow birds in the North-East of Ukraine to the Newcastle disease virus were carried out. PDefinitions of antibodies to the newcastle disease virus in eggs of artificial nesting birds and determining their role as a reservoir of the causative agent of the disease in the North-East of Ukraine.Methods. The work was carried out in 2019 from April to December in the department for the study of poultry diseases at the National Scientific Center "Institute of Experimental and Clinical Veterinary Medicine", as well as at the Department of Zoology at the H. S. Skovoroda Kharkiv National Pedagogical University. Serological studies of the yolks of eggs taken from a hollow nesting box of birds. Antibodies in egg yolk extracts from birds of artificial box nests against the virus of newcastle disease, were determined in the reaction of delayed hemagglutination (HAGA).Result. Antibodies to the newcastle disease virus in titers 1:2 (3,3%) were detected in Phoenicurus phoenicurusFicedula albicollisErithacus rubeculaeggs and Phoenicurus phoenicurus, titers1:64 (23,3%) and 1:128 (26,6%) were found in the yolks of all studied species of artificial nesting birds. The highest antibody titers are 1:256 (26,6%) and 1:512 (6,6%) in the yolks of Ficedula albicollisand Phoenicurus phoenicuruseggs.Originality.Discovered of antibodies to the newcastle disease virus in the yolk of birds of artificial nesting box in conditions of the North-East of Ukraine.Conclusion. According to the results of serological studies of the eggs of birds of four species (Ficedula albicollis, Parus major, Erithacus rubeculaand Phoenicurus phoenicurus), which nest in northeastern Ukraine, it was found that antibodies to the Newcastle disease virus were found in 30 (66.6%).Key words:antibodies, Newcastle disease, hollow-nesting birds, egg yolk extracts, artificial nests box.

Prevailing forest types in the river catchments within the Left-Bank Forest-Steppe zone, Ukraine

Abstract The aim of the study was to determine the distribution of prevailing forest types within the catchment areas of the biggest rivers in the north-east of Ukraine. During the allocation of the catchment areas of the studied rivers, the MapInfo Professional 12.5 program and the vector map of Ukraine were used. The research covered the forest area (more than 502,000 ha) of the state forest enterprises managed by the State Forest Resources Agency of Ukraine. The studied area located on the tributaries of the Sula, Psel, Vorskla and Siversky Donets rivers within the Poltava, Kharkiv, Sumy, Chernihiv, Kyiv and Cherkasy administrative regions of Ukraine. The analysis of the forest fund was carried out based on the electronic subcompartment database of the Ukrderzhlisproekt Production Association, using the application software and geoinformation technologies. It was revealed that a large variety of forest types in the tributaries of the Sula, Psel, Vorskla and Siversky Donets rivers as well as the prevalence of fresh fertile maple-lime oak and fresh fairly infertile oak-pine forest types (in 75 tributaries of Psel, Vorskla and Siversky Donets rivers) and fresh fertile maple-lime oak and fresh fertile hornbeam oak forest types (in 20 tributaries of the Sula River) are due to the relief, hydrological and soil-climatic conditions of the studied area, as well as anthropogenic factor. Assuming homogeneous natural conditions, an insignificant number of forest types are formed (up to five). For a large variety of natural conditions, there are at least six forest types that should be taken into account during forest management, along with the characteristics of the catchment areas of tributaries. The analysed data on the total number of forest types in the catchments of rivers would be appropriate to use in the future when creating a single list of forest types for the Left-Bank Forest-Steppe zone of Ukraine. The prevalence of certain forest types within the catchment areas of tributaries of the Sula, Psel, Vorskla and Siversky Donets rivers directly depends on the soil and climatic conditions, geomorphological structure, relief and anthropogenic influence in the forests. The results should be used in forest management activities to preserve and restore the species diversity of forests within the river catchments.

Сучасний стан бука в дослідних культурах і дендропарках північного сходу України та перспективи його використання

Представлено узагальнені результати обстеження насаджень бука лісового (Fagus sylvatica L.), бука східного (Fagus orientalis Lypsky.) та бука кримського (Fagus taurica Popl.) у дослідних культурах і дендрологічних парках північного сходу України. Метою досліджень було визначення придатності видів для створення насаджень різного цільового призначення в регіоні. Оцінено 11 насаджень бука за комплексом показників, зокрема за особливостями росту, якістю стовбурів, станом і репродукційним розвитком. За результатами комплексного оцінювання буки лісовий і кримський визнано перспективними для створення плантаційних культур. Буки лісовий, східний і кримський доцільно використовувати також для озеленення в Харківській і Сумській областях.

Vitality Structure of the Populations of Vegetative Motile Plants of Forest Ecosystems of the North-East of Ukraine

Background: The vitality level of the populations has turned out to be statistically reliably associated with such coenotic factors: age and density of forest stand. In general, the vitality spectra vary widely: the quality index Q of the populations ranges from 0,00 to 0,50, that is, it fully covers the theoretically possible scale of the values of this coefficient, which indicates the sensitivity of the vitality structure of the populations to the ecological-coenotic conditions and determines high informative value of the vitality analysis. Objective: The aim of the study is to assess the vitality structure of the populations of vegetative motile plant species – typical representatives of the grassy layer of forest ecosystems of the North-East of Ukraine as a factor that determines their stability and dynamics. Methods: The analysis of the vitality structure is based on the field studies of the populations of 4 vegetative motile species of plants – Aegopodium podagraria L., Asarum europaeum L., Carex pilosa Scop. and Stellaria holostea L. in forest ecosystems of the North-East of Ukraine. Vitality analysis was carried out according to Yu. A. Zlobin’s methodology. Vitality analysis procedure, classically, is carried out in three stages: 1) Selection of quantitative features that characterize the vital status of the individual plant; 2) Evaluation of vitality of individual plants that were included in the sample; 3) Integral assessment of the population’s vitality. Depending on the ratio in the population of plants of classes a, b and c, the population belongs to one of three vitality types: prosperous, equilibrium or depressive. Results: The obtained estimates of the vitality structure of populations of the clone-forming plants in the grass-shrub layer of forests of the North-East of Ukraine can be considered quite reliable, because they are based, in general, on a complete analysis of the morphological structure of about 13 thousand ramets of the studied species of plants. The statistical reliability of estimates of the population’s vitality structure is predominantly between 70 and 99% and only in some cases lower than 70%. As the clone grows older, its ramet’s vitality decreases and the clone degrades. New young clones, that start to form on the basis of genets, replace old ones. Such ramets have increased vitality, greater stress and competitive resistance. Due to the mechanisms of clone substitution in the living cover, the dominance of nemoralis herbs persists for a long time. Conclusion: The vitality spectra of the populations of the studied species of plants vary widely: the quality index Q of the populations ranges from 0,00 to 0,50, that is, it covers full theoretically possible scale of the values of this coefficient, which indicates the sensitivity of the vitality structure of the populations to the ecological-coenotic conditions and determines high informative value of vitality analysis. Prosperous populations: two populations A. europaeum of the associations Quercetum (roboris) coryloso (avellanae) – convallariosum (majalis) and Quercetum (roboris) coryloso (avellanae) – convallariosum (majalis), two populations A. podagraria of the associations – Pinetum (sylvestris) vacciniosum (myrtilli) and Querceto (roboris) – Pinetum (sylvestris) convallarioso (majalis) – vacciniosum (myrtilli), one population S. holostea of the association Querceto (roboris) – Pinetum (sylvestris) vacciniosum (myrtilli) and one population C. pilosa of the association Querceto (roboris) – Pinetum (sylvestris) vaccinioso (myrtilli) – convallariosum (majalis).

MYKHAILO TYMOFIEIEV. SILHOUETTE OF A SECURITY GUARD AGAINST THE BACKGROUND OF THE GREAT TERROR ERA

Among the employees of the Soviet state security agencies, who at different times worked on the territory of modern Sumy region, the figure of MykhailoTymofieiev is prominent. He played an important role in the repressive measures by the Soviet authorities on the political grounds in the North-East of Ukraine. Being the Head of the Novhorod-Siverskyi district department of the DPU, Mykhailo Tymofieiev governed the elimination of anti-Soviet armed formations led by the Atamans Vashchenko and Rubliov-Chernov. During the Holodomor, as head of the Kharkiv Regional Department of the State Political Administration, M.Tymofieiev promoted the implementation of an operational plan of eliminating insurgent groups and organizations on the territory of Sumy region. For this activity he was awarded the Order of the Red Banner of Labour. The period of his being the head of the Chernihiv Regional Directorate of the NKVD of 1934-1936 was marked by repressive actions against the Trotskyist supporters. Tymofieiev’s excellent work in Chernihiv received a positive assessment by the Ukrainian SSR Internal Affairs Commissar V.A. Balitskyi. Despite his close friendship with the disgraced chief of the GPU-NKVD of Ukraine, M. Tymofieiev managed to avoid repressions by the state security agencies at the times of the Great Terror. During the years 1937-1956 M.M. Tymofieiev held high positions in the system of the Main Department of Correctional Labour Camps. Key words: MykhailoTymofieiev, NKVD, political repressions, Bilomor-Baltic canal.

Cultural-educational factors of teaching decorative-applied art in the North-East of Ukraine in the second half of the XIX – early XX centuries

Cultural-educational factors of teaching decorative-applied art in the North-East of Ukraine in the second half of the XIX – early XX centuries

Cultivation of grapes in the conditions of forest-steppe zone of Kharkiv region: modern status and prospects

The purpose of this article is to highlight the possibilities of successful grape growing based on the use of agro-climatic resources of the Eastern forest-steppe of Ukraine, in particular, the relevant areas of Kharkiv region. Main material. Attention is drawn to the needs to intensify research and practical activities on the cultivation of grapes in the region. In the agricultural sector of Ukraine interest in cultivating grapes is growing in more in northern areas, than in its traditional distribution area. An urgent task is a more thorough study of agro-climatic conditions, clarifi cation of agro-clima tic zoning of this culture and the development of practical recommendations. This is especially true of the Eastern forest-steppe of Ukraine and its individual areas, including the northern part of Kharkiv region. This industry, judging by the success of farms and individual economies, can be highly profi table throughout the region but with some reservations. Currently, one of the problems of viticulture is to obtain suffi cient yield to supply the population. For this purpose, the author identifi es the features of the natural conditions of the region. Clarifi cation of agro-climatic features of the territory can be considered as a multi-stage task of agro-climatic zoning at diff erent levels. The Eastern forest-steppe region should be considered as part of a large agroecosystem, occupying a signifi cant place in the forest-steppe zone of Ukraine. Of particular interest are the climatic indicators, the assessment of which allows to justify the grape culture management. These indicators are grouped together. The most important of them are temperature, humidity, light conditions and features of the winter period. Distribution of rainfall (fl ow of water) in the phases of grapes development during the active growing season is also important. It is also necessary to pay a???? ention to the use of other indicators. Most of them are closely related to the hydrothermal coeffi cient (HTC) - the simplest and most informative indicator. It should be added that using special agricultural techniques cultivation of certain grape varieties can be possible in the north-east of Ukraine. Conclusions. The study of suitable forest-steppe agrometeorological regions in Kharkiv region for growing grapes in natural conditions continues to be relevant. This difficult task requires a lot of effort and involvement of specialists.

Optimization of Ginkgo biloba cultivation technology in open soil conditions

In recent years, interest in cultivating Ginkgo biloba L. as a medicinal plant has grown in Ukraine, and improvement of the technology of growing this plant in the conditions of the North-East of Ukraine is a relevant problem. The purpose of this article to present research on the morphological structure, growth and viability of young G. biloba plants in grown from seeds by different technologies and comparative analysis of growth and development of G. biloba plants under greenhouse conditions and on open soil. The experiment on G. biloba cultivation was initiated in 2014 in three variants (the plants were grown from the seeds). Variant No 1: G. biloba growing in a greenhouse at 60–80% humidity and temperatures not below +27 ºС; shading (shading level 60%) by green agronetting. Variant No 2: growing in open soil; shading (shading level 60%) by green agronetting; the climatic conditions were typical for Sumy region. Variant No 3: growing in open soil; there was no shading; climatic conditions were typical for the Sumy region. Plant analysis was conducted in June 2018. The following morphometric parameters of G. biloba plants were measured: plant height, annual growth of shoots, number of leaves, leaf size and leaf area, phytomass of the shoots, phytomass of leaves and phytomass of the stem, diameter of the shoots. The sampling used 60 samples. The leaf area was determined by the method of drawing contours on millimeter paper. Statistical processing of research results was carried out by generally accepted modern methods of mathematical statistics using dispersion, correlation, regression and vital analysis. In the conditions of the Ukrainian North East, G. biloba seedlings can be grown successfully in greenhouses and open soil, both with 60% shade by agronetting and without it. Differences between the plants grown in such conditions are insignificant and statistically unreliable. The obtained three to four year old G. biloba seedlings grown using different technologies were 25–30 cm in height and formed 13–17 leaves per plant. The seedlings were of quite high viability (Q is 0.22–0.30) and morphostructural integrity (67.8%). The output of viable seedlings (vital classes “a” and “b”) in variant 1 was 60%, variant 2 45% and variant 3 60%. Ecological-cenotic stability of G. biloba was observed repeatedly, though certain limitations on G. biloba cultivation may be that the plant is photophilic and thermophilic. But the conducted experiments show that the climatic conditions of the Ukrainian North-East are quite favourable for this species. Based on the data obtained for the Ukrainian North-East, it is possible to recommend the technology of growing G. biloba seedlings in open soil without agronetting as quite effective and low-cost.

Evaluation of collection flax accessions for resistance to fusarium wilt and anthracnose in the North-East of Ukraine

Goal. To evaluate collection flax accessions of the Institute of Bast Crops for resistance to Fusarium wilt and anthracnose in the North-east Ukraine, to identify, on the basis of screening, varieties with medium and high resistance to pathogens and to create new initial breeding material on artificial infections. Materials and methods. The study was carried out in the infectious-provocative nursery in the field of the Institute of Bast Crops in compliance with the "Methodical guidelines for the phytopathological evaluation of resistance of breeding material of fiber flax to Fusarium wilt" and " Methodological instructions on the phytopathological evaluation of resistance of fiber flax to diseases" in 2011 ­ 2016. Results and discussion. In 2011-2016, 115 accessions of the Ukrainian national flax collection from 15 countries were evaluated for resistance to Fusarium wilt and anthracnose in the infectious nursery: 31 accessions from Ukraine; 26 – from Belarus; 15 - from France; 8 - from Russia; 8 - from Poland; 6 - from the USA; 4 - from Lithuania; 4 - from the Czech Republic; 4 – from Argentina; 3 - from the Netherlands; 1 accession from Belgium; 1 - from Germany; 1 - from Kenya; 1 - from Morocco; 1 from Canada; and 1 accession of unknown origin. Varieties were assessed for resistance to disease in comparison with reference varieties. There were 8 Fusarium-resistant and 3 Colletotrichum-resistant accessions. Most of the varieties under investigation were medium resistant to Fusarium wilt (59.1%) and susceptible to anthracnose (82.6 %). Conclusions. As a result of the research into resistance of the collection material to Fusarium wilt and anthracnose in the infectious nursery, sources of resistance to diseases were identified: ACM Duff (UF0402149) from Canada, Atena (UF0401927) from Poland, LKS 2 (UF0402112), LKS 10 (UF0402101), LKS 11 (UF0402102), LKS 12 (UF0402196), LKS 14 (UF0402194), LKS 15 (UF0402198) from Ukraine - to Fusarium wilt; LKS 1 (UF0402111), LKS 11 (UF0402102) from Ukraine, Fort (UF0401942) from the Republic of Belarus - to anthracnose. Ukrainian fiber flax accessions combining resistance to two diseases: LKS 11 (resistance to Fusarium wilt and anthracnose), LKS 2, LKS 10, LKS 12, LKS 14, and LKS 15 (resistance to Fusarium wilt and medium resistance to anthracnose), LKS 1 (medium resistance to Fusarim wilt and resistance to anthracnose) were singled out.

Population analysis of Asarum europaeum in the Northeast of Ukraine

An analysis of populations of Asarum europaeum L. in forest ecosystems of the North East of Ukraine during the growing periods of 2004–2015 was carried out. In carrying out field research we used standard methods of ecology, geobotany such as study plots of 400 m2, and for detailed elaboration of the surface layer we used study plots of 100 m2. According to the results of the examination of plots of the size 50 x 50 cm, we obtained data on the number and density of individuals within populations. We found that populations of this species often dominate in the lower tiers of broadleaf and mixed forests in the region under research. We identified the basic population characteristics of the species and described its growth and development in three subformations: Querceta roboris, Pineta sylvestris, Acereto (platanoiditis) – Querceta (roboris). It was found that according to the time gradient, depending on meteorological conditions, the projective cover and the average population density of the plants vary. Based on the average growth rate of the plants, the balance of morphogenesis in the course of the plants’ ontogenesis was determined. We found that the best conditions for the growth and development of A. europaeum are provided in the North East of Ukraine in the subformation of Querceta roboris. The results of the analysis of ontogenetic state of partial bushes in populations of A. europaeum are described. It was found that populations in the subformation Querceta roboris and Pineta sylvestris were full-membered, while in the subformation Acereto (platanoiditis) – Querceta (roboris) they were not fully-membered with fallout of seedlings and juvenile plants. It was found that the population of A. europaeum in the Pineta sylvestris subformation, is left sided, with the peak number in pregenerative partial bushes – this was the youngest population with the highest Index innovation value and the lowest Index senilis value. The Index senilis of the youngest population is 0.14 while the Index generative is 45.0%. The population of A. europaeum in the subformation of Querceta roboris was more mature: Index senilis is equal to 0.19, the age range of the left-hand side with the peak on the partial bushes g1, Index generative reaches 55.4%. In the population with the subformation Acereto (platanoiditis) – Querceta (roboris) Index senilis is significantly greater than one and equals 2.35. In the oldest population, the age spectrum is centered with the peak on generative partial bushes, the Index generative is high and equals 68.5%. This vital analysis of the population structure is based on a sample of more than 3,000 partial shrubs. The key signs of vitality were: total phytomass (W), leaf surface (A) and reproductive effort (RE1). It has been established that two of the three studied populations of A. europaeum are in equilibrium (from the subformations of Pineta sylvestris and Acereto (platanoiditis) – Querceta (roboris) and one is flourishing.