<?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>0377-9424</journal-id>
<journal-title><![CDATA[Agronomía Costarricense]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Costarricense]]></abbrev-journal-title>
<issn>0377-9424</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica. Colegio de Ingenieros y Agrónomos. Ministerio de Agricultura y Ganadería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0377-94242017000200093</article-id>
<article-id pub-id-type="doi">10.15517/rac.v41i2.31302</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación de la actividad insecticida de Schinus molle sobre Premnotrypes vorax EN PAPA]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of insecticide activity of Schinus molle on Premnotrypes vorax in potato]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[Isabel Cristina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivera]]></surname>
<given-names><![CDATA[Verónica Elizabeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yánez]]></surname>
<given-names><![CDATA[Ángel Wilfrido]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Artieda]]></surname>
<given-names><![CDATA[Jorge Rodrigo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Elevación Villacres]]></surname>
<given-names><![CDATA[Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Técnica de Ambato Facultad de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>41</volume>
<numero>2</numero>
<fpage>93</fpage>
<lpage>101</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0377-94242017000200093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0377-94242017000200093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0377-94242017000200093&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El molle (Schinus molle) es una anacardiácea nativa del sur de Brasil, Paraguay, Uruguay, Perú, Bolivia, Chile y Argentina. El ciclo biológico del gusano blanco de la papa (Premnotrypes vorax) tarda entre 134 a 280 días y el daño es producido por el adulto al alimentarse de las hojas del tercio medio e inferior de la planta y por las larvas que atacan los tubérculos, los cuales pueden ocasionar la pérdida total de la cosecha. Se evaluó el porcentaje de inhibición de eclosión de huevos y de mortalidad de larvas y adultos del gusano blanco de la papa (Premnotrypes vorax) por efecto de la aplicación de diferentes dosis del extracto acuoso del molle (Schinus molle L.) bajo condiciones de laboratorio. El extracto de molle fue obtenido por el método de destilación por arrastre de vapor, aplicado por inmersión a los diferentes estados de desarrollo de la plaga y su efecto fue evaluado 24, 48 y 72 horas después de la aplicación. Los resultados mostraron que el extracto acuoso de S. molle provocó 50% de mortalidad en adultos a las 24 horas a concentración del 5%, mientras que a una concentración del 10% produjo 25% de mortalidad a las 48 h. Adicionalmente, se observó 25% de inhibición de la eclosión de los huevos con la aplicación de extracto al 10% a las 24 h después de la aplicación. A pesar de que los valores de mortalidad producidos por la aplicación del extracto acuoso no superaron el 50% en adultos, su uso podría ser considerado como una alternativa en el manejo de poblaciones del gusano blanco. Sin embargo, su efecto y su compatibilidad con otros métodos de control deben ser validados bajo condiciones de campo de manera que se pueda ofrecer como una alternativa para pequeños y medianos productores.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Molle (Schinus molle) is an anacardiaceae plant native to southern Brazil, Paraguay, Uruguay, Peru, Bolivia, Chile and Argentina. Biological cycle of the Andean potato weevil (Premnotrypes vorax) lasts about 134 to 280 days and damage is inflicted by adults when they feed on leaves from the middle and lower third of the plant and for the larvae when they feed on tubers, which may cause total crop loss. Egg hatching inhibition and mortality of larvae and adults of Andean potato weevil (Premnotrypes vorax) was evaluated by applying different doses of molle aqueous extract (Schinus molle L.) under laboratory conditions. Molle extract was obtained by steam distillation and it was applied by immersing the different pest development stages and its effect was evaluated 24, 48 and 72 hours after application. Results showed that aqueous extract of S. molle at 5% concentration caused 50% mortality in adults at 24 h, while a concentration of 10% produced 25% mortality at 48 h. Additionally, 25% inhibition of egg hatching was observed with the use of 10% concentration extract at 24 h after application. Although mortality rates produced by application of aqueous extract did not surpass 50% in adults, its use could be considered as a tangible alternative in management of populations of Andean potato weevil. However, its effect and compatibility with other control methods must be validated under field conditions so that it can be offered as an alternative for small and medium farmers.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Actividad insecticida]]></kwd>
<kwd lng="es"><![CDATA[concentración]]></kwd>
<kwd lng="es"><![CDATA[extracto]]></kwd>
<kwd lng="es"><![CDATA[mortalidad]]></kwd>
<kwd lng="es"><![CDATA[metabolito]]></kwd>
<kwd lng="en"><![CDATA[Insecticide activity]]></kwd>
<kwd lng="en"><![CDATA[concentration]]></kwd>
<kwd lng="en"><![CDATA[extract]]></kwd>
<kwd lng="en"><![CDATA[mortality]]></kwd>
<kwd lng="en"><![CDATA[metabolite]]></kwd>
</kwd-group>
</article-meta>
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