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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Agronomy and Animal Industries</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Agronomy and Animal Industries</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Агрономия и животноводство</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-797X</issn><issn publication-format="electronic">2312-7988</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">20171</article-id><article-id pub-id-type="doi">10.22363/2312-797X-2025-20-1-102-114</article-id><article-id pub-id-type="edn">ICAAZP</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Plant protection</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Защита растений</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Biological efficacy of chitosan nanoparticles and black poplar buds ethanolic extract against potato dry rot</article-title><trans-title-group xml:lang="ru"><trans-title>Биологическая эффективность наночастиц хитозана и экстракта почек тополя черного в отношении сухой гнили картофеля</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2106-556X</contrib-id><contrib-id contrib-id-type="scopus">57221497255</contrib-id><name-alternatives><name xml:lang="en"><surname>Zeitar</surname><given-names>Elsayed M.</given-names></name><name xml:lang="ru"><surname>Зеитар</surname><given-names>Елсайед Мохаммед</given-names></name></name-alternatives><bio xml:lang="en"><p>PhD student, Department of Biotechnology, Aquaculture, Soil Science and Land Management, Faculty of Agro-biology, Astrakhan State University; Researcher, Plant Pathology Department, Faculty of Agriculture, Damanhour University</p></bio><bio xml:lang="ru"><p>аспирант, кафедра биотехнологии, биоэкологии, почвоведения и управления земельными ресурсами, агробиологический факультет, Астраханский государственный университет им. В.Н. Татищева; ассистент кафедры фитопатологии сельскохозяйственного факультета, Даманхурский университет</p></bio><email>elsayedzeitar@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5841-655X</contrib-id><contrib-id contrib-id-type="researcherid">GWN-0323-2022</contrib-id><contrib-id contrib-id-type="spin">8200-1324</contrib-id><name-alternatives><name xml:lang="en"><surname>Sukhenko</surname><given-names>Liudmila T.</given-names></name><name xml:lang="ru"><surname>Сухенко</surname><given-names>Людмила Тимофеевна</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Biological Sciences, Department of Biotechnology, Aquaculture, Soil Science and Land Management, Faculty of Biology</p></bio><bio xml:lang="ru"><p>доктор биологических наук, профессор, доцент кафедры микробиологии</p></bio><email>sukhenko@list.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1995-0730</contrib-id><contrib-id contrib-id-type="scopus">57221498810</contrib-id><name-alternatives><name xml:lang="en"><surname>Mohammed</surname><given-names>Sabah R.</given-names></name><name xml:lang="ru"><surname>Мохаммед</surname><given-names>Сабах Раби</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Agricultural Sciences, Plant Protection Department, Faculty of Agriculture</p></bio><bio xml:lang="ru"><p>кандидат сельскохозяйственных наук, кафедра защиты растений, сельскохозяйственный факультет</p></bio><email>srabie106@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Damanhour University</institution></aff><aff><institution xml:lang="ru">Даманхурский университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Astrakhan State University</institution></aff><aff><institution xml:lang="ru">Астраханский государственный университет им. В.Н. Татищева</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-06-28" publication-format="electronic"><day>28</day><month>06</month><year>2025</year></pub-date><volume>20</volume><issue>1</issue><issue-title xml:lang="en">Therapeutic case of animal welfare</issue-title><issue-title xml:lang="ru">Терапевтический кейс благополучия животных</issue-title><fpage>102</fpage><lpage>114</lpage><history><date date-type="received" iso-8601-date="2025-07-02"><day>02</day><month>07</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Zeitar E.M., Sukhenko L.T., Mohammed S.R.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Зеитар Е.М., Сухенко Л.Т., Мохаммед С.Р.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Zeitar E.M., Sukhenko L.T., Mohammed S.R.</copyright-holder><copyright-holder xml:lang="ru">Зеитар Е.М., Сухенко Л.Т., Мохаммед С.Р.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://agrojournal.rudn.ru/agronomy/article/view/20171">https://agrojournal.rudn.ru/agronomy/article/view/20171</self-uri><abstract xml:lang="en"><p>The purpose of the recent study was to evaluate the effectiveness of chitosan nanoparticles (CSNP) and black poplar buds extract (BpE) to protect potato tubers from post-harvest Fusarium dry rot. A high virulent Fusarium isolate was recovered from natural infected tubers in Astrakhan region and subjected to molecular identification using ITS rDNA gene and identified as Fusarium sumbucinum . CSNP were successfully prepared by ionic gelation method with size ranged from 79.4 to 186.4 nm as observed by scanning electron microscopy (SEM), and a positive zeta potential of 53.1 mv. CSNP at a concentration of 2 g/l, and BpE at a concentration of 40 g/l completely inhibited Fusarium fungal growth on PDA medium in vitro . CSNP at a rate of 20 g/t and BpE at a rate of 400 g/t significantly reduced the incidence of dry rot under natural infection during 8 months of storage by 54.7 and 58.5% and reduced the disease index by 65.7 and 72.3%, respectively, and there was not a significant difference between the two treatments. These results demonstrate the potential of CSNP and BpE for protection of potato tubers against the fungal postharvest decay.</p></abstract><trans-abstract xml:lang="ru"><p>Цель исследования - оценка эффективности наночастиц хитозана (CSNP) и экстракта почек тополя черного (BpE) для защиты клубней картофеля от послеуборочной фузариозной сухой гнили. Высоковирулентный изолят Fusarium выделен из зараженных естественным путем клубней в Астраханской области, подвергнут молекулярной идентификации с использованием гена ITS-rDNA и идентифицирован как Fusarium sumbucinum . CSNP успешно получены методом ионного гелеобразования с размером в диапазоне от 79,4 до 186,4 нм, наблюдаемым с помощью сканирующей электронной микроскопии (СЭМ), и положительным дзета-потенциалом 53,1 мВ. CSNP при концентрации 2 г/л и BpE при концентрации 40 г/л полностью подавляли рост грибов рода Fusarium на среде КДА in vitro . CSNP в дозе 20 г/т и BpE в дозе 400 г/т значительно снизили частоту сухой гнили при естественном заражении в течение 8 месяцев хранения на 54,7 и 58,5 %, а также снизили индекс заболеваемости на 65,7 и 72,3 % соответственно, и между этими двумя обработками не было существенной разницы. Эти результаты демонстрируют потенциал наночастиц хитозана и экстракта почек тополя черного для защиты клубней картофеля от грибковой послеуборочной гнили.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Nanotechnology</kwd><kwd>Fusarium</kwd><kwd>plant diseases</kwd><kwd>antifungal</kwd><kwd>plant extracts</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>нанотехнологии</kwd><kwd>фузариоз</kwd><kwd>болезни растений</kwd><kwd>противогрибковое средство</kwd><kwd>растительные экстракты</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Исследователь Е.М. Зеитар финансируется за счет стипендии в рамках совместной исполнительной программы между Арабской Республикой Египет и Российской Федерацией.</institution></institution-wrap><institution-wrap><institution xml:lang="en">Zeitar E.M. is funded by a scholarship under the joint (executive program between the Arab Republic of Egypt and the Russian Federation).</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Gachango E, Kirk W, Hanson L, Rojas A, Tumbalam P, Shetty K. 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