<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952018000500713</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efectividad biológica de herbicidas inhibidores de la acetil coenzima a carboxilasa y acetolactato sintasa y la presencia de resistencia en Echinochloa crus-galli (L.) Beauv.]]></article-title>
<article-title xml:lang="en"><![CDATA[Biological efficacy of the inhibitor herbicides of acetyl coenzyme a carboxylase and acetolactate synthase and the presence of resistance in Echinochloa crus-galli (L.) Beauv.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bolaños-Jiménez]]></surname>
<given-names><![CDATA[Jovany]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Uscanga-Mortera]]></surname>
<given-names><![CDATA[Ebandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tafoya-Razo]]></surname>
<given-names><![CDATA[J. Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kohashi-Shibata]]></surname>
<given-names><![CDATA[Josué]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-García]]></surname>
<given-names><![CDATA[Jesús R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Posgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo  ]]></institution>
<addr-line><![CDATA[Chapingo ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,IPN Centro de Investigaciones y Estudios Avanzados Departamento de Ingeniería Genética]]></institution>
<addr-line><![CDATA[Irapuato Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2018</year>
</pub-date>
<volume>52</volume>
<numero>5</numero>
<fpage>713</fpage>
<lpage>723</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952018000500713&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952018000500713&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952018000500713&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En Guanajuato, Echinochloa crus-galli es la principal maleza en el trigo y se controla con herbicidas inhibidores de la acetil coenzima A carboxilasa (ACCasa) y la acetolactato sintetasa (ALS), pero se ha observado un control deficiente. El objetivo de esta investigación fue determinar la efectividad biológica de los herbicidas usados en el trigo y la presencia de resistencia en E. crus-galli. El experimento se realizó en dos fases: 1) efectividad biológica y, 2) presencia de resistencia. Para evaluar efectividad biológica, en seis biotipos (un bioensayo por biotipo) se aplicaron clodinafop propargil y pinoxaden, inhibidores de la ACCasa, y flucarbazone sódico y mesosulfuron metil+iodosulfuron metil, inhibidores de la ALS, en dosis de 60, 55, 28 y 15 g de a.i. ha-1, respectivamente. Cada herbicida fue un tratamiento más un testigo, y el diseño fue completamente al azar con cuatro repeticiones. Para presencia de resistencia se evaluó el efecto de dosis crecientes de flucarbozone sódico y mesosulfuron metil+iodosulfuron metil en la producción de biomasa seca de los seis biotipos y se calculó el índice de resistencia, y el diseño fue bloques completos al zar con cuatro repeticiones. Efectividad biológica: la aplicación de los inhibidores de la ACCasa en los biotipos mostró un control de 99 % y el peso de biomasa seca fue menor, mientras que la aplicación de los inhibidores de la ALS causó un control de 42 %, excepto en un biotipo que fue 77 % y se consideró como susceptible, y el peso seco de la biomasa en algunos casos fue similar a la del testigo. Presencia de resistencia: el índice de resistencia a mesosulfuron metil+iodosulfuron metil fue mayor a 2.0 en dos biotipos, mientras que para el flucarbazone sódico los índices de resistencia fueron menores de 1.35. Por lo tanto, se confirmó la resistencia de E. crus-galli a mesosulfuron metil+iodosulfuron metil.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In the state of Guanajuato, Mexico, Echinochloa crus-galli is the main weed in wheat and is controlled with inhibitors herbicides of acetyl coenzyme A carboxylase (ACCase) and acetolactate synthetase (ALS), but its control is poor. The objective of this research was to determine the biological efficacy of the herbicides used in wheat and the presence of resistance in E. crus-galli. The experiment was carried out in two phases: 1) biological efficacy and, 2) presence of resistance. To evaluate the biological efficacy in six biotypes (one bioassay per biotype) we applied clodinafop propargil and pinoxaden, ACCase inhibitor herbicides, and sodium flucarbazone and mesosulfuron methyl + iodosulfuron methyl, ALS inhibitor herbicides, in doses of 60, 55, 28 and 15 g of a.i. ha-1, respectively. Each herbicide was one treatment plus a control, and the design was completely randomized with four replications. Regarding the presence of resistance we evaluated the effect of increasing doses of sodium flucarbozone and mesosulfuron methyl+iodosulfuron methyl on the production of dry biomass of the six biotypes, and calculated the resistance index. A completely randomized blocks design was used with four replications. Biological efficacy: the application of the ACCase inhibitor herbicides in the biotypes showed a control of 99 %, and the weight of dry biomass was lower, while the application of the ALS inhibitors caused a control of 42 %, except in one biotype, which was 77 % and it was considered as susceptible. The dry weight of the biomass in some cases was similar to that of the control. Presence of resistance: the resistance index to mesosulfuron methyl+iodosulfuron methyl was greater than 2.0 in two biotypes, while for sodium flucarbazone the resistance indices were lower than 1.35. Therefore, the E. crus-galli resistance to mesosulfuron methyl + iodosulfuron methyl was confirmed.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Echinochloa crus-galli]]></kwd>
<kwd lng="es"><![CDATA[control-químico]]></kwd>
<kwd lng="es"><![CDATA[efectividad]]></kwd>
<kwd lng="es"><![CDATA[resistencia]]></kwd>
<kwd lng="es"><![CDATA[dosis-respuesta]]></kwd>
<kwd lng="en"><![CDATA[Echinochloa crus-galli]]></kwd>
<kwd lng="en"><![CDATA[chemical control]]></kwd>
<kwd lng="en"><![CDATA[efficacy]]></kwd>
<kwd lng="en"><![CDATA[resistance]]></kwd>
<kwd lng="en"><![CDATA[response dose]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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