<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992025000100113</article-id>
<article-id pub-id-type="doi">10.20937/rica.55191</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Extractos botánicos como herbicidas potenciales en un cultivo de maíz]]></article-title>
<article-title xml:lang="en"><![CDATA[Botanical extracts as potential herbicides in a corn crop]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Soto-Barajas]]></surname>
<given-names><![CDATA[Milton Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Prado]]></surname>
<given-names><![CDATA[Blanca]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Vadillo]]></surname>
<given-names><![CDATA[Augusto Esaú]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Ávila]]></surname>
<given-names><![CDATA[Norma Laura]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Consejo Nacional de Ciencia y Tecnología  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geología ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Tecnológico Nacional de México  ]]></institution>
<addr-line><![CDATA[Campeche ]]></addr-line>
<country>México</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>41</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992025000100113&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992025000100113&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992025000100113&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La producción de metabolitos secundarios que las plantas utilizan como estrategia de sobrevivencia puede ayudar en el control de la maleza por su efecto alelopático inhibidor. El objetivo de este estudio fue evaluar, por primera vez, el efecto fitotóxico de extractos de Metopium brownei (MB) y Viguiera dentata (VD) caracterizados por su potencial alelopático en estudios previos in vitro. Se evaluó la capacidad inhibitoria de extractos botánicos (EB) solos, combinados y con atrazina (AZ) en dosis variables, en ensayos de campo en suelo desnudo y cultivo de maíz. La presencia de metabolitos secundarios en los EB se analizó por tamizaje fitoquímico. Además, se determinó el efecto de los EB sobre la germinación y desarrollo inicial del maíz. La composición de metabolitos en los EB de ambas especies tuvo escasa diferencia: se encontraron de manera exclusiva quinonas en el de MB y cumarinas en el de VD. Se comprobó la nula influencia de los EB en la germinación y crecimiento inicial del maíz. Los estudios de campo indicaron que a 60 días de la aplicación de los tratamientos en las parcelas con maíz el control de maleza por la mezcla VD:AZ (2 kg/ha) en relación 3:1 (v/v) fue similar al de AZ a la dosis mínima recomendada. Se propone esta formulación como opción ecológica para el control de malezas en maíz incluso con la adición de dosis reducidas de AZ, dado que permite establecer alternativas sostenibles y menos dependientes de químicos sintéticos tóxicos para el control de la maleza.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Secondary metabolite production, utilized by plants as a survival mechanism, may assist in weed control due to its inhibitory allelopathic effect. This study aimed to evaluate, for the first time, the phytotoxic effects of Metopium brownei (MB) and Viguiera dentata (VD) extracts, characterized by their allelopathic potential as reported in previous in vitro studies. The inhibitory effect of botanical extracts (BE) alone, combined, and with atrazine (AZ) in variable doses was assessed through field trials on both bare soil and cultivated maize. The presence of secondary metabolites in the BE was analyzed by phytochemical screening 24 and 72 h after preparation. Furthermore, an in vitro effect of the BE on germination and initial development of maize was analyzed. Both species&#8217; composition of BE metabolites presented scarce differences; quinones were found exclusively in MB, while coumarins were only found in VD. No influence from de BE was shown on germination and initial growth of maize. Field studies indicated that 60 days after the application of the treatment in maize plots, weed control was similar both with the VD:AZ (2 kg/ha) mixture in a 3:1 (v/v) ratio and with atrazine at the minimum recommended dose. This formulation is proposed as an environmentally friendly option for weed control in corn, even with reduced doses of AZ. It allows for establishing sustainable alternatives that are less dependent on toxic synthetic chemicals for weed control.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Metopium brownei]]></kwd>
<kwd lng="es"><![CDATA[Viguiera dentata]]></kwd>
<kwd lng="es"><![CDATA[arvenses]]></kwd>
<kwd lng="es"><![CDATA[bioherbicidas]]></kwd>
<kwd lng="es"><![CDATA[atrazina]]></kwd>
<kwd lng="en"><![CDATA[Metopium brownei]]></kwd>
<kwd lng="en"><![CDATA[Viguiera dentata]]></kwd>
<kwd lng="en"><![CDATA[weeds]]></kwd>
<kwd lng="en"><![CDATA[bioherbicides]]></kwd>
<kwd lng="en"><![CDATA[atrazine]]></kwd>
</kwd-group>
</article-meta>
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