<?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>0185-3309</journal-id>
<journal-title><![CDATA[Revista mexicana de fitopatología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fitopatol]]></abbrev-journal-title>
<issn>0185-3309</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Fitopatología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-33092015000200211</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Epidemiología de la mancha vellosa (Mycosphaerella caryigena) y su impacto en la defoliación del nogal pecanero]]></article-title>
<article-title xml:lang="en"><![CDATA[Epidemics caused by Mycosphaerella caryigena and their impact in defoliation pecan tree]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Samaniego-Gaxiola]]></surname>
<given-names><![CDATA[José Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar-Pérez]]></surname>
<given-names><![CDATA[Heriberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pedroza-Sandoval]]></surname>
<given-names><![CDATA[Aurelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,INIFAP Centro de Investigación Regional Norte Centro ]]></institution>
<addr-line><![CDATA[ Coahuila]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Junta Local de Sanidad Vegetal de Zaragoza, del Estado de Coahuila  ]]></institution>
<addr-line><![CDATA[Zaragoza Coah]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma Chapingo Unidad Regional Universitaria de Zonas Áridas ]]></institution>
<addr-line><![CDATA[Bermejillo Durango]]></addr-line>
<country>MX</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2015</year>
</pub-date>
<volume>33</volume>
<numero>2</numero>
<fpage>211</fpage>
<lpage>218</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-33092015000200211&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-33092015000200211&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-33092015000200211&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[En el nogal pecanero, el hongo Mycosphaerella caryigena es el agente causal de la mancha vellosa, el cual induce lesiones en el follaje hasta causar la defoliación. En los años 1998, 1999 y 2014, se evaluaron nueve modelos epidemiológicos de lesión/hoja vs tiempo. En 1992, se ensayaron modelos epidemiológicos para la captura de esporas vs tiempo. En 1998, también se evaluó lesiones/hoja vs defoliación y defoliación vs tiempo. Las epidemias de 1998, 1999 y 2014 ajustaron a los modelos Logístico Ln, Gompertz y Logístico Ln, respectivamente. La defoliación del nogal por M. caryigena en 1998 inició en agosto y culminó con 95 % en septiembre. Los modelos Gompertz y Log10 tuvieron el mejor ajuste para defoliación vs tiempo y lesiones/hoja vs defoliación con R2 0.924 y 0.937, respectivamente. La captura de esporas de M. caryigena fue &gt; 50 % de abril a mayo; el modelo monomolecular fue el que mejor ajustó a la captura de esporas (R2 0.948). Las lesiones/hoja aparecieron en junio y fueron &gt; 100 en septiembre justo cuando la defoliación alcanzó &gt; 90 %. Los modelos lesiones/hoja vs tiempo, sugieren períodos prolongados para producir el inóculo y de incubación del hongo en la hoja, lo cual coincide con lo que se conoce del ciclo de la enfermedad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[In the pecan tree, the fungus Mycosphaerella caryigena is the causal agent of the pecan downy spot, which causes injury on foliage and defoliation. In the years 1998, 1999 and 2014, ten epidemiological models of lesion/leaf vs time were evaluated. In 1992, epidemiological models were tested for the capture of spores vs. time. In 1998, lesions/leaf defoliation and defoliation vs time was also evaluated. The epidemics of 1998, 1999 and 2014 fitted the models of Logistic Ln, Gompertz and Logistic Ln, respectively. Defoliation of pecan tree by M. caryigena began in August 1998 and ended with 95 % in September. The Gompertz and Log10 models were the best fit for defoliation vs time and lesions/leaf vs defoliation with R2 0.924 and 0.937, respectively. The capture of spores of M. caryigena was &gt;50 % from April to May; the monomolecular model was the best fit to the capture of spores (R2 0.948). The lesions/leaf appeared in June and were &gt;100 in September, just when the defoliation reached &gt;90 %. The models lesions/leaf vs time, suggest prolonged periods to produce the inoculum and the incubation of the fungus on the leaf, which coincides with what is known of the disease cycle.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Hongos]]></kwd>
<kwd lng="es"><![CDATA[follaje]]></kwd>
<kwd lng="es"><![CDATA[enfermedades]]></kwd>
<kwd lng="en"><![CDATA[Fungi]]></kwd>
<kwd lng="en"><![CDATA[foliage]]></kwd>
<kwd lng="en"><![CDATA[diseases]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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