<?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>0253-5785</journal-id>
<journal-title><![CDATA[Centro Agrícola]]></journal-title>
<abbrev-journal-title><![CDATA[Ctro. Agr.]]></abbrev-journal-title>
<issn>0253-5785</issn>
<publisher>
<publisher-name><![CDATA[Editorial Feijóo, Universidad Central de Las Villas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0253-57852020000200022</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Distribución espacial en el limbo foliar de la roya naranja (Puccinia kuehnii (W. Krüger) E. J. Butler) en caña de azúcar]]></article-title>
<article-title xml:lang="en"><![CDATA[Spatial distribution in the leaf limb of orange rust (Puccinia kuehnii (W. Krüger) E. J. Butler) in sugarcane]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aday Díaz]]></surname>
<given-names><![CDATA[Osmany de la Caridad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Pérez]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Estación Territorial de Investigaciones de la Caña de Azúcar (ETICA Centro Villa Clara)  ]]></institution>
<addr-line><![CDATA[Ranchuelo Villa Clara]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Investigaciones de la Caña de Azúcar  ]]></institution>
<addr-line><![CDATA[Boyeros La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>47</volume>
<numero>2</numero>
<fpage>22</fpage>
<lpage>30</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0253-57852020000200022&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0253-57852020000200022&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0253-57852020000200022&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La roya naranja de la caña de azúcar (Puccinia kuehnii (W. Krüger) E. J. Butler), es una enfermedad de peligro potencial para la agroindustria azucarera en Cuba. El objetivo de la investigación fue determinar la distribución espacial de la roya naranja en el limbo de las hojas infectadas por P. kuehnii, tipo de distribución de las pústulas y el posible uso de una variable cuantitativa que permita estimar el área foliar afectada con una precisión superior a la observación del ojo humano. Del cultivar C01-227 (susceptible a la enfermedad) se colectaron 25 hojas y se seleccionó la hoja +5. El tipo de distribución espacial de las pústulas se determinó calculando la relación varianza / media y el índice Morisita. Se determinó un máximo de 6,88 pústulas por cm2 en hojas con 25 % del área foliar afectada y un promedio de 2,26 en hojas con afectación desde 5 hasta 25 %. El número de pústulas por centímetro cuadrado fue significativamente superior en los tercios medio y apical, pero en el tercio medio de la hoja, su valor promedio o máximo no está relacionado directamente con el área foliar afectada en toda la hoja.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The orange rust of the sugar cane (Puccinia kuehnii (W. Krüger) E. J. Butler) is a disease of potential danger for the sugar industry in Cuba. The objective of the research was to determine the spatial distribution of orange rust in leaves infected by P. kuehnii, type of distribution of the pustules and the possible use of a quantitative variable that allows estimating the affected leaf area with a superior precision to observation of the human eye. From the cultivar C01-227 (susceptible to the disease), 25 leaves were collected and the +5 leaf was selected. The type of spatial distribution of the pustules was determined by calculating the variance / mean ratio and the Morisita index. A maximum of 6.88 pustules per cm2 was determined in leaves with 25 % of affected leaf area and an average of 2.26 in leaves with affectation from 5 to 25 %. The pustules for square centimeters was significantly higher in the middle and apical thirds; but in the third of the leaf, their value average or their maximum is not related directly with area affected in the leaf.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[índices de agregación]]></kwd>
<kwd lng="es"><![CDATA[pústulas]]></kwd>
<kwd lng="es"><![CDATA[Saccharum sp]]></kwd>
<kwd lng="en"><![CDATA[aggregation indices]]></kwd>
<kwd lng="en"><![CDATA[pustules]]></kwd>
<kwd lng="en"><![CDATA[Saccharum sp.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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