Harmfulness Invasive Pest-Oak Mining Sawfly (Profenusa Pygmaea, Klug, 1814)

Mukhamadiyev, N. S.; Mengdibayeva, G. Zh.; Nizamdinova, G.K.; Shakerov, A.S.

doi:10.32014/2021.2518-1483.109

Cited by 3 publications

(1 citation statement)

References 1 publication

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“…Compared to the annual indicator of 2010, the area of dieback for the first half of 2020 increased by 50% [4]. Currently, the actual state of oak forests in Ukraine is such that it is worth talking about their degradation since oak stands are significantly weakened by synoptic and climatic anomalies (in particular, hydrothermal stress) [5,6], invasive species [7][8][9], and infectious agents [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Phytopathogenic Bacteria Associated with Bacterioses of Common Oak (Quercus robur L.) in Ukraine

Kulbanska

Shvets

Goychuk

et al. 2022

Forests

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Studying the biological characteristics of the causative agents of bacteriosis of the common oak (Quercus robur L.) (to highlight the links between the key factors of pathogenesis and bacterial groups) is a new and relevant area of research. This work aims to identify the species composition of phytopathogenic bacteria associated with common oak bacteriosis and to study the morphological, cultural, and biochemical properties of pathogens. To establish the general phytosanitary state of the surveyed stands, classical forest inventory and phytopathological (visual on based on typical symptoms of the disease and macroscopic) methods were used. The properties of isolated bacteria were studied using microbiological methods. The weakening and dieback of common oak in the forests of Ukraine is directly related to four types of bacterioses and their pathogens: the soft bacterial rot of acorns (Pectobacterium carotovorum subsp. carotovorum, bacterial wetwood (Lelliottia nimipressuralis), dry rot of branches and trunks (Erwinia rhapontici), and canker disease (Pseudomonas fluorescens and Pseudomonas sp.). Research on the correspondence between the biological properties of common oak bacteriosis pathogens has established that the synthesis of pectin-degrading enzymes and the ability to ferment with the release of acid and gas in many carbohydrate media by phytopathogenic bacteria is the main characteristic. This ensures the intensity and typical symptoms of the pathogenesis of a particular bacteriosis.

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Section: Introductionmentioning

confidence: 99%

Phytopathogenic Bacteria Associated with Bacterioses of Common Oak (Quercus robur L.) in Ukraine

Kulbanska

Shvets

Goychuk

et al. 2022

Forests

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Etiology of Bacterial Wetwood of Quercus Robur L.

Kulbanska¹

2022

Ukr. j. for. wood sci.

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Phytopathogenic bacteria in the plant organism form an integral part of the accompanying microflora, as well as pathogens of pathological processes that do not just weaken the plant, but shortly (with acute pathogenesis) lead to degradation and complete dieback. Notably, bacteriosis is described by typical macroscopic signs of the course of the disease, but the exact aetiology of the pathological process can be reliably established only based on bacteriological analysis with the identification of morphological, cultural, and biochemical properties of isolates. The purpose of this study is to experimentally confirm the direct causes of oak degradation caused by bacterial wetwood in the tree stands under study, as well as to investigate the morphological and biochemical properties of the pathogen. This study employed classical microbiological, phytopathological, and biochemical methods that establish the aetiology of the disease, analyse typical symptoms, include microscopy of the affected parts of the oak, isolation, and identification of the pathogen. The properties of bacterial isolates were figured out according to generally accepted methods and using the API 20E test system and the NEFERMtest24 MikroLaTEST®, ErbaLachema a test system. It was experimentally confirmed that by all macroscopic signs (crown openness, exudate discharge from bark cracks, presence of depressed (sunken) necrotic wet wounds in certain areas of cracks, development of a wet pathological core, presence of epicormic sprouts, etc.) the identified disease is a systemic, vascular-parenchymal bacteriosis, known as bacterial wetwood of common oak. The isolated bacterial isolates were identified by morphological, physiological, and biochemical properties as Lelliottia nimipressuralis – the causative agent of bacterial wetwood of common oak. This suggests that the aetiology of degradation of common oak in Ukraine is closely related to bacteriosis, and the results of this study allow for early phytosanitary diagnostics of the state of common oak in natural conditions based on typical symptomatic signs

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Influence of winter storage methods of acorns on the development and growth processes of common oak

Yavorovskyi,

Hurzhii,

Kulbanska

et al. 2023

Ukr. j. for. wood sci.

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The economic value and biological stability of common oak stands (Quercus robur L.), grown from acorns is substantially higher in comparison with plantings of undergrowth origin. Therefore, the cultivation of acorn oak stands is relevant and promising, especially where there is no natural restoration of oak. The purpose of the study was the improvement of seed production technology and cultivation of high-quality planting material of common oak seeds with various methods of winter storage to expand the area of oak forests. In the course of the study, forest-cultural (determination of quality indicators of acorns, planting material, and forest cultures), biometric (determination of growth indicators and mass of planting material), and classical statistical research methods were used. The study was conducted on the territory of the forest fund of the Hertsaevsky state special Forestry and Kuzmynsky Forestry branches of “Chernivtsi Forestry” of the state specialised economic enterprise “Forests of Ukraine”. It is shown that each of the winter storing methods of acorns of common oak has its own advantages and disadvantages, which are more or less manifested in different methods of cultivation. As a result of comparing the influence of different cultivation methods on the development of common oak plants grown from seeds stored in a trench method, it was determined that the best growth parameters of the aboveground part of plants were observed when using the larding method. However, the least intensive development of the root system was observed when growing oak with a closed root system. It was found that the weighted average biometric indicators of the growth processes of common oak plants grown from seeds that were stored in tap water were the highest when growing acorns by larding. It is proved that the experimental plants of common oak grown from seeds that were stored in a cellar with sand lagged behind in the development of the aboveground part when grown by a landing method. It was established that the root system developed worse when growing plants with an open root system. The proposed acorn storage technology can be applied to improve the efficiency and quality of reproduction of oak stands by forestry enterprises in Ukraine

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Harmfulness Invasive Pest-Oak Mining Sawfly (Profenusa Pygmaea, Klug, 1814)

Cited by 3 publications

References 1 publication

Phytopathogenic Bacteria Associated with Bacterioses of Common Oak (Quercus robur L.) in Ukraine

Phytopathogenic Bacteria Associated with Bacterioses of Common Oak (Quercus robur L.) in Ukraine

Etiology of Bacterial Wetwood of Quercus Robur L.

Influence of winter storage methods of acorns on the development and growth processes of common oak

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