<?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>0377-9424</journal-id>
<journal-title><![CDATA[Agronomía Costarricense]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Costarricense]]></abbrev-journal-title>
<issn>0377-9424</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica. Colegio de Ingenieros y Agrónomos. Ministerio de Agricultura y Ganadería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0377-94242022000200101</article-id>
<article-id pub-id-type="doi">10.15517/rac.v46i2.52051</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tolerancia de varias leguminosas de cobertura a herbicidas pre y posemergentes*]]></article-title>
<article-title xml:lang="en"><![CDATA[Tolerance of various legume cover crops to pre- and post-emergence herbicides]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Gómez]]></surname>
<given-names><![CDATA[Robin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Lutz]]></surname>
<given-names><![CDATA[María Isabel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Estación Experimental Agrícola Fabio Baudrit Moreno ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica Escuela de Estadística ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>46</volume>
<numero>2</numero>
<fpage>101</fpage>
<lpage>116</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0377-94242022000200101&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0377-94242022000200101&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0377-94242022000200101&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Introducción. Los cultivos de cobertura compiten en sus etapas iniciales de crecimiento con las malezas, por lo que en áreas donde predominan malezas de muy rápido crecimiento es necesaria la aplicación de herbicidas para controlarlas mientras la cobertura se establece. Objetivo. Evaluar la tolerancia de las leguminosas Mucuna pruriens (L) DC cv. preta, M. pruriens cv. cinza, Vigna radiata (L.) Wilczek, Pueraria phaseoloides (Roxb) Benth. y Crotalaria spectabilis Roth a herbicidas preemergentes y posemergentes. Materiales y métodos. Se realizaron 2 estudios en un invernadero de la Universidad de Costa Rica, situado en Alajuela, Costa Rica. En el primer experimento se evaluaron los herbicidas posemergentes cletodim, fluazifop-p-butil, fomesafen y bentazon, en el 2012 y se repitió en el 2013. El segundo experimento se realizó 2 veces en el 2014 para evaluar los herbicidas preemergentes pendimetalina, oxifluorfen, alachlor y linuron. Se evaluó la altura, el grado de daño y el peso seco de las plantas sembradas en potes de 1,5 litros. El diseño experimental utilizado fue completamente aleatorio. Resultados. Todas las especies evaluadas, con excepción de P. phaseoloides, resultaron tolerantes a bentazon, cletodim y fluazifop-p-butil. Estas especies también mostraron tolerancia a alaclor, linuron y pendimetalina. P. phaseoloides fue tolerante a fomesafen y fluazifop-p-butil, pero resultó moderadamente afectado por los herbicidas preemergentes. Solamente las plantas aplicadas con oxifluorfen y fomesafen evidenciaron una reducción significativa del peso seco, con excepción de las plantas de P. phaseoloides aplicadas con fomesafen. Conclusión. Las leguminosas evaluadas resultaron tolerantes a la mayoría de los herbicidas aplicados para control de monocotiledóneas y dicotiledóneas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Introduction. Cover crops compete during their initial growth stages with weeds, therefore in areas where the predominant weeds are fast growers it is necessary to spray herbicides to control those plants while the cover gets established. Objetive. To evaluate the tolerance of the legumes Mucuna pruriens (L) DC cv. preta, M. pruriens cv. cinza, Vigna radiata (L.) Wilczek, Pueraria phaseoloides (Roxb) Benth. and Crotalaria spectabilis Roth to pre- and postemergence herbicides. Materials and methods. Two studies were carried out in a greenhouse of the University of Costa Rica, located in Alajuela, Costa Rica. The first experiment evaluated the postemergence herbicides clethodim, fluazifop-p-butyl, fomesafen and bentazon in 2012 and was repeated in 2013. The second experiment was performed twice in 2014 to evaluate the postemergence herbicides pendimethalin, oxyfluorfen, alachlor and linuron. Plant height, injury index and dry weight of plants sowed in 1.5 liters pots was assessed. The experimental design was completely randomized. Results. All the evaluated species, except for P. phaseoloides, were tolerant to bentazon, cletodim and fluazifop-p-butil. These species were also tolerant to alachlor, linuron, and pendimethalin. P. phaseoloides was tolerant to fomesafen and fluazifop-p-butyl, but resulted moderately affected by the preemergent herbicides. Only plants treated with oxyfluorfen and fomesafen showed a significant dry weight reduction, except for P. phaseoloides plants sprayed with fomesafen. Conclusion. The evaluated legumes were tolerant to the majority of the sprayed herbicides for the control of both dicotyledonous and monocotyledonous weeds.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cultivos de cobertura]]></kwd>
<kwd lng="es"><![CDATA[manejo de malezas]]></kwd>
<kwd lng="es"><![CDATA[abonos verdes]]></kwd>
<kwd lng="es"><![CDATA[coberturas vivas]]></kwd>
<kwd lng="en"><![CDATA[Cover crops]]></kwd>
<kwd lng="en"><![CDATA[weed management]]></kwd>
<kwd lng="en"><![CDATA[green manures]]></kwd>
<kwd lng="en"><![CDATA[living mulches]]></kwd>
</kwd-group>
</article-meta>
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