<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The aim of this study was to evaluate the health condition of <italic>Fraxinus excelsior</italic> L. in provenance tests, with special focus on ash dieback (ADB), but taking into account also other causes of its decline. The research was carried out in the provenance tests of <italic>F. excelsior</italic> in the forest-steppe part of the Sumy region. ADB symptoms were revealed in all provenance tests. For 2012–2019 the health condition index, ADB incidence and severity increased for all provenances except the Steppe. Collar rot was present in all ash provenances. Fungi species were isolated from the stem parts of ash at all provenances. <italic>Hymenoscyphus fraxineus</italic> induced longest necrotic lesions following wound inoculation of stems of 7–10-years-old plants of European ash in the forest while inoculation with both <italic>Cytospora</italic> sp. and <italic>Diplodia</italic> sp. resulted in smaller necroses. The conclusion from other regions about the coincidence the damage of European ash by ADB and collar rots as well as the coincidence the damage of European ash by collar rot and tree colonization by <italic>Hylesinus crenatus</italic> (Fabricius, 1787) is supported.</p></abstract>

The aim of this study was to evaluate the health condition of Fraxinus excelsior L. in provenance tests, with special focus on ash dieback (ADB), but taking into account also other causes of its decline. The research was carried out in the provenance tests of F. excelsior in the forest-steppe part of the Sumy region. ADB symptoms were revealed in all provenance tests. For 2012–2019 the health condition index, ADB incidence and severity increased for all provenances except the Steppe. Collar rot was present in all ash provenances. Fungi species were isolated from the stem parts of ash at all provenances. Hymenoscyphus fraxineus induced longest necrotic lesions following wound inoculation of stems of 7–10-years-old plants of European ash in the forest while inoculation with both Cytospora sp. and Diplodia sp. resulted in smaller necroses. The conclusion from other regions about the coincidence the damage of European ash by ADB and collar rots as well as the coincidence the damage of European ash by collar rot and tree colonization by Hylesinus crenatus (Fabricius, 1787) is supported.

Ash dieback and contributing factors of forest weakening in provenance tests in the Sumy region

Department of Forest Mycology and Plant Pathology

Central European Forestry Journal

This work is licensed under the Creative Commons Attribution 4.0 International License.

The aim of this study was to evaluate the health condition of Fraxinus excelsior L. in provenance tests, with special focus on ash dieback (ADB), but taking...

Ash dieback and contributing factors of forest weakening in provenance tests in the Sumy region

Published Online: May 12, 2021

Page range: 113 - 121

DOI: https://doi.org/10.2478/forj-2021-0001

Keywords
collar rot, health condition, incidence, severity

© 2021 Valentyna Meshkova et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Ash dieback and contributing factors of forest weakening in provenance tests in the Sumy region

Published Online: May 12, 2021

Page range: 113 - 121

DOI: https://doi.org/10.2478/forj-2021-0001

Keywordscollar rot, health condition, incidence, severity

© 2021 Valentyna Meshkova et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
collar rot, health condition, incidence, severity