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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">phytosanitary</journal-id><journal-title-group><journal-title xml:lang="ru">Фитосанитария. Карантин растений</journal-title><trans-title-group xml:lang="en"><trans-title>Plant Health and Quarantine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2782-327X</issn><publisher><publisher-name></publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.69536/FKR.2026.20.73.003</article-id><article-id custom-type="elpub" pub-id-type="custom">phytosanitary-232</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ДИАГНОСТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>DIAGNOSTICS</subject></subj-group></article-categories><title-group><article-title>Биологические и морфологические особенности возбудителя суховершинности ясеня Chalara fraxinea T. Kowalski</article-title><trans-title-group xml:lang="en"><trans-title>Biological and morphological characters of Chalara fraxinea T. Kowalski</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-3678-406X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зайцева</surname><given-names>Л. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zaitseva</surname><given-names>L. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зайцева Лидия Валерьевна, младший научный сотрудник ЦКП «Молекулярная генетика»</p><p>пгт Быково, м. о. Раменский, Московская обл., 140150</p></bio><bio xml:lang="en"><p>Lidiya Zaitseva, Junior Researcher, Center for Collective Use “Molecular Genetics”</p><p>Bykovo, Ramenskoye, Moscow Oblast, 140150</p></bio><email xlink:type="simple">lidiya.zaitzeva26@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-4024-6450</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Камченков</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kamchenkov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Камченков Александр Владимирович, заведующий лабораторией микологии ИЛЦ</p><p>пгт Быково, м. о. Раменский, Московская обл., 140150</p></bio><bio xml:lang="en"><p>Alexander Kamchenkov, Head of Mycology Laboratory, Testing Laboratory Center</p><p>Bykovo, Ramenskoye, Moscow Oblast, 140150</p></bio><email xlink:type="simple">akamchenkov@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Всероссийский центр карантина растений» (ФГБУ «ВНИИКР»)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>All-Russian Plant Quarantine Center (FGBU “VNIIKR”)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>29</day><month>05</month><year>2026</year></pub-date><volume>0</volume><issue>2</issue><fpage>35</fpage><lpage>43</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Зайцева Л.В., Камченков А.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Зайцева Л.В., Камченков А.В.</copyright-holder><copyright-holder xml:lang="en">Zaitseva L.V., Kamchenkov A.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://phytosanitary.vniikr.ru/jour/article/view/232">https://phytosanitary.vniikr.ru/jour/article/view/232</self-uri><abstract><p>В статье представлена информация о возбудителе суховершинности ясеня Chalara fraxinea T. Kowalski (телеоморфа Hymenoscyphus fraxineus (T. Kowalski) Baral, Queloz &amp; Hosoya 2014). Данное заболевание представляет серьезную угрозу для лесного хозяйства и биологического разнообразия. Отмечено, что возбудитель родом из Восточной Азии, где он поражает местные виды ясеня как эндофит. Однако при интродукции на Европейский континент приводил к гибели до 90% ясеневых насаждений. На основе анализа литературных данных и собственных наблюдений приведены сведения о географическом распространении патогена (32 страны Европы и три страны Азии), круге растений-хозяев (12 видов ясеня и виды семейства Oleaceae), биологических особенностях (жизненный цикл с анаморфной и телеоморфной стадиями), условиях формирования апотециев и аскоспор, путях распространения. Систематизированы основные симптомы поражения, а также культурально-морфологические признаки телеоморфы и анаморфы патогена. В статье представлены авторские иллюстрации.</p></abstract><trans-abstract xml:lang="en"><p>The article provides information on the agent of ash dieback Chalara fraxinea T. Kowalski (teleomorph Hymenoscyphus fraxineus (T. Kowalski) Baral, Queloz &amp; Hosoya 2014). This disease poses a serious threat to forestry and biodiversity. It is noted that the pathogen is native to East Asia, where it affects native ash species as an endophyte. However, when introduced to the European continent, it led to the death of up to 90% of ash stands. Based on an analysis of literary data and our own observations, information is provided on the geographic distribution of the pathogen (32 European countries and three Asian countries), the range of host plants (12 ash species and species of the Oleaceae family), biological characters (life cycle with anamorphic and teleomorphic stages), the conditions for the formation of apothecia and ascospores, and pathways. The main damage symptoms, as well as the cultural and morphological characters of the pathogen’s teleomorphs and anamorphs, are systematized. The article includes the author’s illustrations.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Chalara fraxinea</kwd><kwd>Hymenoscyphus fraxineus</kwd><kwd>Fraxinus excelsior</kwd><kwd>суховершинность ясеня</kwd><kwd>инвазивный вид</kwd><kwd>культурально-морфологические признаки</kwd><kwd>жизненный цикл.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Chalara fraxinea</kwd><kwd>Hymenoscyphus fraxineus</kwd><kwd>Fraxinus excelsior</kwd><kwd>ash dieback</kwd><kwd>invasive species</kwd><kwd>cultural and morphological characters</kwd><kwd>life cycle.</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Coker T.L.R., Rozsypálek J., Edwards A., Harwood T.P., Butfoy L., Buggs R.J.A. 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