<?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>S0185-33092019000200001</article-id>
<article-id pub-id-type="doi">10.18781/r.mex.fit.1812-2</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Quitosano y extractos de Pseudomonas fluorescens para el control de Alternaria alternata en jitomate (Solanum lycopersicum)]]></article-title>
<article-title xml:lang="en"><![CDATA[Chitosan and Pseudomonas fluorescens extracts for Alternaria alternata control in tomato (Solanum lycopersicum)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Romero]]></surname>
<given-names><![CDATA[Víctor Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villanueva-Arce]]></surname>
<given-names><![CDATA[Ramón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trejo-Raya]]></surname>
<given-names><![CDATA[Ariadna Berenice]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bautista-Baños]]></surname>
<given-names><![CDATA[Silvia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Unidad Profesional Interdisciplinaria de Biotecnología Laboratorio de Biotecnología Alimentaria]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Desarrollo de Productos Bióticos Departamento de Tecnología Postcosecha]]></institution>
<addr-line><![CDATA[San Isidro Morelos]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>37</volume>
<numero>2</numero>
<fpage>202</fpage>
<lpage>219</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-33092019000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-33092019000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-33092019000200001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen. Alternaria alternata es un hongo que ocasiona daños en el cultivo de jitomate, se caracteriza por producir manchas negras y marchitez en plantas y frutos; los fungicidas sintéticos son las principales herramientas para controlar este hongo. El objetivo del estudio fue evaluar el efecto de la aplicación de mezclas de quitosano y extractos de Pseudomonas fluorescens en el control de A. alternata bajo condiciones in vitro sobre micelio y conidios, así como la incidencia y severidad en plantas de jitomate en invernadero. El uso de la mezcla de quitosano 1.5% (p/v) + extracto de P. fluorescens 50% (v/v) resultó en 60 y 100% de inhibición in vitro de crecimiento micelial y germinación de conidios de A. alternata respectivamente. En invernadero, las plantas se inocularon con A. alternata, posteriormente se asperjaron con la mezcla de quitosano 1.5% (p/v) + extracto de P. fluorescens 50% (v/v) cada 7 días hasta la floración. La incidencia fue del 100 %, mientras que la severidad fue 51.8 y 38.9 para 7 días y 16.9 y 16.2% para 60 días, respectivamente. La mezcla utilizada es una opción para el control de A. alternata.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract. Alternaria alternata is a fungus that causes damage to the tomato crop, it is characterized by producing black spots and wilting in plants and fruits; synthetic fungicides are the main tools to control this fungus. The objective of this study was to evaluate the effect of the application of mixtures of chitosan and extracts of Pseudomonas fluorescens in the control in vitro of A. alternata on mycelium and conidia, as well as the incidence and severity in greenhouse tomato plants. The use of the mixture of chitosan 1.5% (w/v) + extract of P. fluorescens 50% (v/v) resulted in 60 and 100% of in vitro inhibition of mycelial growth and conidia germination of A. alternata respectively. In greenhouse, the plants were inoculated with A. alternata, later they were sprayed with the mixture of chitosan 1.5% (w/v) + extract of P. fluorescens 50% (v/v) every 7 days until flowering. The incidence was 100%, while the severity was 51.8 and 38.9% for 7 days and 16.9 and 16.2% for 60 days, respectively. The mixture used is an option for the control of A. alternata.]]></p></abstract>
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<kwd lng="es"><![CDATA[actividad antifúngica]]></kwd>
<kwd lng="es"><![CDATA[control biológico]]></kwd>
<kwd lng="es"><![CDATA[incidencia]]></kwd>
<kwd lng="es"><![CDATA[severidad]]></kwd>
<kwd lng="en"><![CDATA[antifungal activity]]></kwd>
<kwd lng="en"><![CDATA[biological control]]></kwd>
<kwd lng="en"><![CDATA[incidence]]></kwd>
<kwd lng="en"><![CDATA[severity]]></kwd>
</kwd-group>
</article-meta>
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