<?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>2305-0683</journal-id>
<journal-title><![CDATA[Investigación Agraria]]></journal-title>
<abbrev-journal-title><![CDATA[Investig. Agrar.]]></abbrev-journal-title>
<issn>2305-0683</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ciencias Agrarias, UNA.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2305-06832023000200064</article-id>
<article-id pub-id-type="doi">10.18004/investig.agrar.2023.diciembre.2502766</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Eficacia biológica del glifosato en la desecación de Brachiaria ruziziensis con coadyuvantes basados en compuestos naturales]]></article-title>
<article-title xml:lang="en"><![CDATA[Biological efficacy of glyphosate in controlling Brachiaria ruziziensis with adjuvants based on natural compounds]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Neufeld]]></surname>
<given-names><![CDATA[Robert]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Cooperativa Chortitzer Ltda Servicio Agropecuario ]]></institution>
<addr-line><![CDATA[Loma Plata ]]></addr-line>
<country>Paraguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>25</volume>
<numero>2</numero>
<fpage>64</fpage>
<lpage>71</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_arttext&amp;pid=S2305-06832023000200064&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_abstract&amp;pid=S2305-06832023000200064&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_pdf&amp;pid=S2305-06832023000200064&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El uso del glifosato en la agricultura es de fundamental importancia para la conservación del suelo al evitar la utilización del arado para el control de malezas. Los coadyuvantes como surfactantes y reductores de pH pueden aumentar la eficacia del herbicida. Últimamente, entre los productores locales, se observa el uso de coadyuvantes de origen natural, resultantes de procesos de fermentación y/o condensación, en combinación con el glifosato, presuntamente posibilitando el control de malezas con dosis de glifosato reducidas. En este estudio se comparó la eficacia de dos coadyuvantes basados en compuestos naturales, el Ácido Piroleñoso (AP) y una solución producto de fermentación de hierbas, con diferentes dosis de glifosato, con un surfactante y reductor de pH comercial. Los resultados muestran la capacidad de reducción de pH de ambos coadyuvantes de origen natural, pero una tendencia de reducción de eficacia del glifosato para el AP y antagonismo con el glifosato para la solución producto de fermentación de hierbas, en comparación con el producto comercial. Según el conocimiento del autor, este es el primer reporte en la literatura científica del uso del AP como coadyuvante del glifosato.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The use of glyphosate in sustainable agriculture is of fundamental importance for soil conservation by avoiding the plow. Adjuvants such as surfactants and pH reducers can increase the effectiveness of the herbicide. Lately, the use of adjuvants of natural origin, resulting from fermentation and/or condensation processes, as adjuvants for glyphosate, has been observed among local farmers, presumably making it possible to control weeds with glyphosate rates reduced by as much as 50%. In this study, the efficacy of two adjuvants based on natural compounds, Pyroligneous Acid and a herbs fermentation product solution, and their effect at different doses of glyphosate, are compared with a commercial surfactant and pH reducer. To the author's best knowledge, this is the first report in scientific literature of the use of Pyroligneous Acid as an adjuvant for glyphosate. The results show the pH reduction capacity of both adjuvants of natural origin, however a trend of reduced efficacy of glyphosate for Pyroligneous Acid and antagonism with glyphosate for the herbs fermentation product solution, compared to the commercial adjuvant, was observed.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Brachiaria ruziziensis]]></kwd>
<kwd lng="es"><![CDATA[Ácido Piroleñoso]]></kwd>
<kwd lng="es"><![CDATA[coadyuvante natural]]></kwd>
<kwd lng="en"><![CDATA[Brachiaria ruziziensis]]></kwd>
<kwd lng="en"><![CDATA[Pyroligneus Acid]]></kwd>
<kwd lng="en"><![CDATA[natural adjuvant]]></kwd>
</kwd-group>
</article-meta>
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