<?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>0185-3309</journal-id>
<journal-title><![CDATA[Revista mexicana de fitopatología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fitopatol]]></abbrev-journal-title>
<issn>0185-3309</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Fitopatología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-33092025000300013</article-id>
<article-id pub-id-type="doi">10.18781/r.mex.fit.2409-1</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Primer registro de Rhizoctonia solani AG-7 causante de pudrición de la raíz del frijol común en México]]></article-title>
<article-title xml:lang="en"><![CDATA[First record of Rhizoctonia solani AG-7 causing root rot of common bean in Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rabago-Zavala]]></surname>
<given-names><![CDATA[Karen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Valenzuela]]></surname>
<given-names><![CDATA[Blanca Elvira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valenzuela-Escoboza]]></surname>
<given-names><![CDATA[Fernando Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lizárraga-Sánchez]]></surname>
<given-names><![CDATA[Glenda Judith]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Ciencias Agropecuarias  ]]></institution>
<addr-line><![CDATA[ Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Occidente  ]]></institution>
<addr-line><![CDATA[ Sinaloa]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>43</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-33092025000300013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-33092025000300013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-33092025000300013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes/Objetivo. En noviembre de 2020, en dos plantaciones de frijol (Phaseolus vulgaris), en el norte Sinaloa, se observaron síntomas de pudrición de raíz y secadera de planta, con incidencia hasta de 35 % por plantación. El presente estudio se estableció con el objetivo de identificar, a través de la secuenciación del ITS y RPB2, a los patógenos asociados a la pudrición de raíz en frijol.  Materiales y Métodos. Se seleccionaron plantas con síntomas en cultivos de frijol en Ahome, Sinaloa, México. Se tomaron muestras de los avances de lesión de raíces y se aislaron hongos con características morfológicas típicas de Rhizoctonia spp. Los postulados de Koch se realizaron en macetas, el inóculo se colocó en base l tallo de plántulas de 15 dias de edad. Una vez demostrada la patogenicidad se identificaron molecularmente los aislados FAVF397 y FAVF 398.  Resultados. Los hongos aislados presentaron micelio septado, hialino a marrón, multinuclear, con ramificaciones en ángulo recto y constricción de la célula basal, no produjeron esporas, y formaron esclerocios. Los aislados FAVF397 y FAVF398 se identificaron molecularmente como Rhizoctonia solani AG-7 y son causantes de la pudrición de raiz del frijol común.  Conclusión. El grupo anastomosico AG7 se reporta por primera vez en frijol en Sinaloa. Estos hallazgos representan un aporte científico en beneficio de productores de este cultivo al permitir el diseño de estrategias de manejo pertinentes y efectivos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT   Background/Objective. In November 2020, in two bean (Phaseolus vulgaris) plantations in northern Sinaloa, symptoms of root rot and plant dieback were observed, with an incidence of up to 35% per plot. The present study was established with the aim of identifying, through the sequencing of ITS and RPB2, the pathogens associated with root rot in beans.   Materials and Methods. Plants with symptoms were selected from bean crops in Ahome, Sinaloa, Mexico. Samples of the lesion advances of the roots of the plants were taken, and fungi with typical morphological characteristics of Rhizoctonia spp. were isolated, which presented septate, hyaline mycelium, forming a right angle and constriction of the basal cell, did not produce spores, and formed sclerotia. Koch's postulates were performed in pots, the inoculum was placed alongside the seed at the time of planting to evaluate the effect on germination and severity in seedlings. Once its pathogenicity was demonstrated, the isolates FAVF397 and FAVF398 were identified molecularly.   Results. The isolates FAVF397 and FAVF398 were molecularly identified as Rhizoctonia solani AG-7 and are responsible for the root rot of common bean.   Conclusion. The AG7 anastomosis group is reported for the first time in beans in Sinaloa. These findings represent a scientific contribution for the benefit of producers of this crop by allowing the design of relevant and effective management strategies.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[vulgaris]]></kwd>
<kwd lng="es"><![CDATA[ITS]]></kwd>
<kwd lng="es"><![CDATA[ARN polimerasa II RPB2]]></kwd>
<kwd lng="en"><![CDATA[Phaseolus vulgaris]]></kwd>
<kwd lng="en"><![CDATA[ITS]]></kwd>
<kwd lng="en"><![CDATA[RNA polymerase II RPB2]]></kwd>
</kwd-group>
</article-meta>
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