<?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>2007-9028</journal-id>
<journal-title><![CDATA[Ecosistemas y recursos agropecuarios]]></journal-title>
<abbrev-journal-title><![CDATA[Ecosistemas y recur. agropecuarios]]></abbrev-journal-title>
<issn>2007-9028</issn>
<publisher>
<publisher-name><![CDATA[Universidad Juárez Autónoma de Tabasco, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-90282019000300565</article-id>
<article-id pub-id-type="doi">10.19136/era.a6n18.2048</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Programa de muestreo para el pulgón amarillo del sorgo, Melanaphis sacchari (Zehntner)]]></article-title>
<article-title xml:lang="en"><![CDATA[Sampling program for the sugarcane aphid, Melanaphis sacchari (Zehntner)), in sorghum]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva-Martínez]]></surname>
<given-names><![CDATA[Christian]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nava-Camberos]]></surname>
<given-names><![CDATA[Urbano]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cano-Ríos]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Carrillo]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ávila-Rodríguez]]></surname>
<given-names><![CDATA[Verónica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Hernández]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Agraria Antonio Narro  ]]></institution>
<addr-line><![CDATA[Torreón Coahuila]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Juárez del Estado de Durango Facultad de Ciencias Biológicas ]]></institution>
<addr-line><![CDATA[Gómez Palacio Durango]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Juárez del Estado de Durango Facultad de Agricultura y Zootecnia ]]></institution>
<addr-line><![CDATA[Gómez Palacio Durango]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>6</volume>
<numero>18</numero>
<fpage>565</fpage>
<lpage>571</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-90282019000300565&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-90282019000300565&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-90282019000300565&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen. El presente estudio se realizó con el objetivo de desarrollar un programa de muestreo para el pulgón amarillo del sorgo (Melanaphis sacchari Zehntner). Esta plaga es actualmente la de mayor importancia económica en el cultivo de sorgo en México y otros países. Se efectuaron cinco muestreos de la plaga en 10 predios de sorgo de la Comarca Lagunera. Se determinó la relación varianza (S2)-media (m) para el número de pulgones mediante el modelo de la Ley de Poder de Taylor y se estimaron los tamaños de muestra óptimos. Las densidades máximas variaron de 394.7 a 754.1 pulgones por hoja en el mes de julio. A través del modelo de regresión obtenido [log (S2) = 0.4374 + 1.6513 log (m), r2 = 0.98] se determinó que para el muestreo del pulgón amarillo del sorgo se deben inspeccionar al menos 39 hojas por predio, con una precisión del 80%.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract. This study was conducted with the aim of developing a sampling program for the sugarcane aphid (Melanaphis sacchari Zehntner). This pest is currently the most economically important in sorghum cultivation in Mexico and other countries. Five samplings of the pest were made in 10 sorghum farms in the Comarca Lagunera. The variance (S2)-media (m)ratio for the number of aphids was determined using the Taylor Power Law model and the optimal sample sizes were estimated. Maximum densities varied from 394.7 to 754.1 aphids per leaf in July. Through the regression model obtained [log (S2) = 0.4374 + 1.6513 log (m), r2 = 0.98], it was determined that for the sampling of the sugarcane aphid in sorghum, at least 39 leaves must be inspected per farm, with an accuracy of 80%.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Densidad]]></kwd>
<kwd lng="es"><![CDATA[hojas infestadas]]></kwd>
<kwd lng="es"><![CDATA[importancia económica]]></kwd>
<kwd lng="es"><![CDATA[inspeccionar]]></kwd>
<kwd lng="es"><![CDATA[promedios máximos]]></kwd>
<kwd lng="en"><![CDATA[Density]]></kwd>
<kwd lng="en"><![CDATA[infested leaves]]></kwd>
<kwd lng="en"><![CDATA[economic importance]]></kwd>
<kwd lng="en"><![CDATA[inspect]]></kwd>
<kwd lng="en"><![CDATA[maximum averages]]></kwd>
</kwd-group>
</article-meta>
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