<?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>2007-3380</journal-id>
<journal-title><![CDATA[Revista bio ciencias]]></journal-title>
<abbrev-journal-title><![CDATA[Revista bio ciencias]]></abbrev-journal-title>
<issn>2007-3380</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma de Nayarit]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-33802023000100426</article-id>
<article-id pub-id-type="doi">10.15741/revbio.10.e1493</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Coleoptericidal activity of an enzymatic extract of Neem (Azadirachta indica) on Aethina tumida]]></article-title>
<article-title xml:lang="es"><![CDATA[Actividad coleoptericida de un extracto enzimático de Neem (Azadirachta indica) sobre Aethina tumida]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Dehaibes]]></surname>
<given-names><![CDATA[Sóstenes R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores Primo]]></surname>
<given-names><![CDATA[Argel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez Rincón]]></surname>
<given-names><![CDATA[Rufino]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[León García]]></surname>
<given-names><![CDATA[Elizabeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez Elvira]]></surname>
<given-names><![CDATA[Karen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Aguirre]]></surname>
<given-names><![CDATA[Samuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Veracruzana Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Veracruz Ver]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Valle de México Campus Boca del Rio ]]></institution>
<addr-line><![CDATA[Boca del Río Ver]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>10</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-33802023000100426&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-33802023000100426&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-33802023000100426&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT This work aimed to obtain enzymatic extracts from green, dried, and frozen neem seeds and to evaluate the coleoptericidal effect on Aethina tumida in the larval stage. In the first phase, the effect of freezing (-20 °C) and dehydration (50 °C) of the green seed on the release of azadirachtin A was evaluated. Subsequently, the enzymatic extraction was carried out using the Crystalzyme® PLMX preparation, followed by an 80 % alcohol extraction (v v v-1). The alcoholic extract was roto evaporated and its coleoptericidal activity on Aethina tumida larvae and adults was evaluated using the Burgerjon Tower with concentrations of 0, 0.05, 0.5, 50, and 500 ppm of azadirachtin A. The results indicated that there is no statistically significant difference in the concentration of azadirachtin A when dehydrating or freezing the neem seeds, likewise, the extracts with 500 ppm of azadirachtin A promoted 100 % mortality of larvae at 48 h, the LC50 and LC90 calculated were 0.58 and 77.67 ppm respectively. According to these results, it is concluded that the enzymatic extracts of neem seeds are a viable alternative for the biological control of Aethina tumida in the larval stage.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El objetivo de este trabajo fue obtener extractos enzimáticos de semillas de neem verdes, secas y congeladas y evaluar el efecto coleoptericida sobre Aethina tumida en etapa larvaria. En la primera fase, se evaluó el efecto de la congelación (-20 °C) y deshidratación (50 °C) de la semilla verde sobre la liberación de azadiractina A. Posteriormente, se realizó la extracción enzimática empleando el preparado Crystalzyme® PLMX, seguida de una extracción alcohólica al 80 % (v v-1). El extracto alcohólico se rotoevaporó y se evaluó su actividad coleoptericida sobre larvas y adultos de Aethina tumida utilizando la Torre de Burgerjon con concentraciones de 0, 0.05, 0.5, 50 y 500 ppm de azadiractina A. Los resultados indicaron que no existe diferencia estadística significativa en la concentración de azadiractina A al deshidratar o congelar las semillas de neem, asimismo, los extractos con 500 pmm de azadiractina A promovieron 100 % de mortalidad de larvas a las 48 h, las LC50 y LC90 calculadas fueron de 0.58 y 77.67 ppm, respectivamente. De acuerdo con estos resultados, se concluye que los extractos enzimáticos de semillas de neem es una alternativa viable para el control biológico de Aethina tumida en etapa larvaria.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Azadirachtin A]]></kwd>
<kwd lng="en"><![CDATA[Bioinsecticide]]></kwd>
<kwd lng="en"><![CDATA[Median lethal concentration]]></kwd>
<kwd lng="en"><![CDATA[Larval stage]]></kwd>
<kwd lng="en"><![CDATA[Terpenoids]]></kwd>
<kwd lng="es"><![CDATA[Azadiractina A]]></kwd>
<kwd lng="es"><![CDATA[Bioinsecticida]]></kwd>
<kwd lng="es"><![CDATA[Concentración letal media]]></kwd>
<kwd lng="es"><![CDATA[Etapa larvaria]]></kwd>
<kwd lng="es"><![CDATA[Terpenoides]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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