<?xml version="1.0" encoding="ISO-8859-1"?><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">
<front>
<journal-meta>
<journal-id>2215-2504</journal-id>
<journal-title><![CDATA[Revista Forestal Mesoamericana Kurú]]></journal-title>
<abbrev-journal-title><![CDATA[Kurú]]></abbrev-journal-title>
<issn>2215-2504</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2215-25042025000100029</article-id>
<article-id pub-id-type="doi">10.18845/rfmk.v22i50.7761</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[First report of Neofusicoccum parvum causing Juglans neotropica dieback in Costa Rica]]></article-title>
<article-title xml:lang="en"><![CDATA[Primer reporte de Neofusicoccum parvum causando muerte descendente en árboles de Juglans neotropica en Costa Rica]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solís]]></surname>
<given-names><![CDATA[María Rodríguez]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez]]></surname>
<given-names><![CDATA[Alexander Berrocal]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez]]></surname>
<given-names><![CDATA[Dawa Méndez]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barquero]]></surname>
<given-names><![CDATA[Verónica Villalobos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica Sanidad Forestal ]]></institution>
<addr-line><![CDATA[Cartago ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2025</year>
</pub-date>
<volume>22</volume>
<numero>50</numero>
<fpage>29</fpage>
<lpage>32</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-25042025000100029&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-25042025000100029&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-25042025000100029&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Durante la época lluviosa en la provincia de Cartago, Costa Rica, árboles de Juglans neotropica (nogal) mostraron síntomas de muerte regresiva. Se realizaron aislamientos desde la zona de avance de los síntomas de estos árboles enfermos en medio de cultivo PDA más antibiótico y se identificó el patógeno Neofusicoccum parvum morfológica y molecularmente (cebadores ITS4-ITS5). La enfermedad causada por este patógeno fue confirmada mediante pruebas de patogenicidad, en donde las plantas inoculadas con el hongo, alcanzaron lesiones de hasta 51.5 mm, a diferencia del control que presentó 7.8 mm, mostrando una diferencia significativa (&#945;&#8804;0,05) y distribución normal entre las variables. Este es el primer reporte de N. parvum causando muerte apical en J. neotropica en Costa Rica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract During the rainy season in the province of Cartago, Costa Rica, Juglans neotropica (walnut) trees showed symptoms of dieback. Isolations were made from the zone of symptom progression of these diseased trees on PDA plus antibiotic culture medium and the pathogen Neofusicoccum parvum was identified morphologically and molecularly (ITS4-ITS5 primers). The disease caused by this pathogen was confirmed by pathogenicity tests, where the plants inoculated with the fungus, reached lesions of up to 51.5 mm, unlike the control that presented 7.8 mm, showing a significant difference (&#945;&#8804;0.05) and a normal distribution among the variables. This is the first report of N. parvum causing apical death on J. neotropica in Costa Rica.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Juglans]]></kwd>
<kwd lng="en"><![CDATA[Neofusicoccum]]></kwd>
<kwd lng="en"><![CDATA[tropical plant disease]]></kwd>
<kwd lng="en"><![CDATA[walnut]]></kwd>
<kwd lng="es"><![CDATA[Juglans]]></kwd>
<kwd lng="es"><![CDATA[Neofusicoccum]]></kwd>
<kwd lng="es"><![CDATA[enfermedad de las plantas tropicales]]></kwd>
<kwd lng="es"><![CDATA[nogal]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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