<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242019000300692</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v10i3.4822</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Actividad acaricida de extractos etanólicos de tres genotipos de Leucaena spp. sobre Rhipicephalus microplus en condiciones in vitro]]></article-title>
<article-title xml:lang="en"><![CDATA[In vitro acaricide activity of extracts from three Leucaena spp. genotypes versus Rhipicephalus microplus]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-López]]></surname>
<given-names><![CDATA[Guadalupe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ojeda-Chi]]></surname>
<given-names><![CDATA[Melina Maribel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Casanova-Lugo]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Oros-Ortega]]></surname>
<given-names><![CDATA[Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Chávez]]></surname>
<given-names><![CDATA[Luis Ignacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Piñeiro-Vázquez]]></surname>
<given-names><![CDATA[Ángel Trinidad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-Vivas]]></surname>
<given-names><![CDATA[Roger Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Tecnológico Nacional de México  ]]></institution>
<addr-line><![CDATA[ Quintana Roo]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Yucatán Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Mérida Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Tecnológico Nacional de México  ]]></institution>
<addr-line><![CDATA[ Quintana Roo]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Tecnológico Nacional de México  ]]></institution>
<addr-line><![CDATA[ Yucatán]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<volume>10</volume>
<numero>3</numero>
<fpage>692</fpage>
<lpage>704</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242019000300692&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242019000300692&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242019000300692&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del presente estudio fue evaluar la actividad acaricida de extractos etanólicos de tres genotipos de Leucaena spp: L. leucocephala (Lam.) de Wit (Nativa), L. leucocephala (Cunningham) y L. Leucocephala x L. padilla (KX2), sobre larvas y garrapatas adultas de Rhipicephalus microplus. Para evaluar la actividad acaricida se usaron las pruebas de inmersión de larvas e inmersión de adultas. Asimismo, en los extractos de los tres genotipos de Leucaena spp. se analizó el perfil de metabolitos secundarios mediante placas analíticas de cromatografía. Los extractos a concentración del 50 % mostraron una mortalidad en larvas de 91.68, 82.00 y 54.06 % para los genotipos Cunningham, KX2 y Nativa, respectivamente. El genotipo Nativa presentó el mejor comportamiento para el control de R. microplus adultas con un 50 % de mortalidad a la concentración de 20 %. En los extractos se identificaron flavonoides y terpenos que pudieran ser los responsables de la actividad acaricida de los tres genotipos de Leucaena; sin embargo, se requiere de más estudios para identificar los metabolitos que tengan una acción individual o en sinergia en el control de R. microplus.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The tick Rhipicephalus microplus is known to develop resistance against some commercial acaracides, driving a search for natural alternatives. An evaluation was done of the acaricide activity against adult and larval R. microplus of ethanol extracts from three Leucaena spp. genotypes: L. leucocephala (Lam.) de Wit (Native); L. leucocephala (Cunningham); and L. Leucocephala x L. padilla (KX2). Larval immersion and adult immersion tests were used to evaluate acaricide activity. Secondary metabolite profiles of the three genotypes were generated using analytical chromatographic plates. Against the larvae, the 50% extract concentration exhibited 91.68% mortality for the Cunningham genotype, 82.00% for the KX2 and 54.06% for the Native. The Native genotype extract was most effective against adults with a 50% mortality at a 20% concentration. Flavonoids and terpenes were identified in all three genotypes and are probably responsible for their acaricide activity. The Leucaena spp. Cunningham and KX2 extracts were effective against R. microplus larvae, but further research is needed to identify the metabolites that provide this acaricide activity, be it individually or synergistically.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ectoparásitos]]></kwd>
<kwd lng="es"><![CDATA[Metabolitos secundarios]]></kwd>
<kwd lng="es"><![CDATA[Extractos vegetales]]></kwd>
<kwd lng="es"><![CDATA[Trópico subhúmedo]]></kwd>
<kwd lng="en"><![CDATA[Ectoparasites]]></kwd>
<kwd lng="en"><![CDATA[Secondary metabolites]]></kwd>
<kwd lng="en"><![CDATA[Vegetal extracts]]></kwd>
<kwd lng="en"><![CDATA[Subhumid tropics]]></kwd>
</kwd-group>
</article-meta>
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