<?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>2730-5066</journal-id>
<journal-title><![CDATA[Agrociencia Uruguay]]></journal-title>
<abbrev-journal-title><![CDATA[Agrocienc. Urug.]]></abbrev-journal-title>
<issn>2730-5066</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Agronomía - Instituto de Nacional de Investigación Agropecuaria]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2730-50662021000201312</article-id>
<article-id pub-id-type="doi">10.31285/agro.25.399</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Avances en el estudio del amarillamiento del duraznero en las diferentes zonas productoras de Jujuy, Argentina]]></article-title>
<article-title xml:lang="en"><![CDATA[Advances in the research on peach yellows disease, in the productive areas of Jujuy, Argentina]]></article-title>
<article-title xml:lang="pt"><![CDATA[Avanços no estudo do Amarelamento do Pessegueiro nas diferentes zonas produtoras de Jujuy, Argentina]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Curzel]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Conci]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bejarano]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Jujuy Facultad de Ciencias Agrarias Cátedra de Fruticultura]]></institution>
<addr-line><![CDATA[Jujuy ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Patología Vegetal  ]]></institution>
<addr-line><![CDATA[Córdoba ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Jujuy Facultad de Ciencias Agrarias Cátedra de Fitopatología]]></institution>
<addr-line><![CDATA[Jujuy ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2021</year>
</pub-date>
<volume>25</volume>
<numero>nspe1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S2730-50662021000201312&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S2730-50662021000201312&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S2730-50662021000201312&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En Jujuy existen 850 ha de durazneros (Prunus persica L.), alrededor de 800 ha se encuentran en los valles templados, donde hace unos años comenzaron a observarse plantas con síntomas de amarillamiento, enrojecimiento, enrollamiento y necrosis de hojas, defoliación prematura y acortamiento de entrenudos, incluso muerte de plantas. El agente causal es fitoplasma Argentinean Peach Yellows (arpy), del subgrupo 16Sr III-B, X-disease. La enfermedad se conoce como «amarillamiento del duraznero», una patología en expansión, sin antecedentes en el país, de la cual es importante conocer su epidemiología: presencia y dispersión en variedades introducidas y naturalizadas, caracterizar la sintomatología y su variación estacional, lo que es parte de los objetivos de este trabajo. Mediante prospecciones visuales realizadas en la temporada 2018-2019, se estimó la incidencia/prevalencia de esta patología en los valles áridos y templados. En valles áridos y en los valles templados altos no se registraron plantas con síntomas; en los valles templados bajos se visualizaron plantas enfermas de arpy y su diagnóstico confirmado en el laboratorio. Se observó variación estacional de la sintomatología: en primavera las plantas se presentaban parcial o totalmente afectadas, con acortamiento de entrenudos, hojas en escoba de bruja, amarillamiento, enrojecimiento y acartuchamiento de hojas basales; en verano el 60 % de ramas sintomáticas de la primavera precedente, muertas o en proceso, sin nuevos síntomas; en otoño muerte de brindillas de ramas sintomáticas y defoliación anticipada. De 25 lotes productivos evaluados en los cultivares Flordaking, Opedepe y Rojo Dos, se determinó una prevalencia del 100 %. Los mayores valores de incidencia se registraron en el cultivar Flordaking. En cuanto a la severidad, medida con una escala de 6 grados, del total de plantas prospectadas (8.871), se observaron los mayores grados en plantas de Flordaking, seguidas de Opedepe y Rojo Dos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In Jujuy, there are 850 hectares of peach trees (Prunus persica L.), 800 hectares are found in the temperate valleys, where plants with symptoms of yellowing, redness, leaf curl and necrosis, premature defoliation and shortening of internodes, even plant death, began to be observed a few years ago. The causal agent is Argentinean Peach Yellows phytoplasma (arpy), from the subgroup: 16Sr III-B, X-disease. The disease is called &#8220;peach yellows&#8221;, and it is an expanding pathology without records in the country. Hence, the objective of this study was to know its epidemiology: presence and dispersion in introduced and naturalized cultivars, characterization of the symptoms and their seasonal variation. Through visual surveys, the prevalence/incidence of the pathology in arid and temperate valleys was estimated during the past crop cycle. In arid and high temperate valleys, symptomatic plants were no recorded; however, diseased plants were visualized in the low temperate valleys and the diagnosis was confirmed in the laboratory. Seasonal variation of the symptoms was observed, in spring, the plants were partially or totally affected, with shortening of internodes, witches' broom on leaves, yellowing, reddening and stiffening of basal leaves; in summer, symptomatic branches of the previous spring were dead or about to die but without new symptoms; in autumn, there was death of symptomatic twigs and early defoliation. Out of 25 productive lots surveyed, in Flordaking, Opedepe and Rojo Dos cultivars, a prevalence of 100 % was determined. The incidence in plants was highest in Flordaking. The severity of the disease, using a 6-degree scale, reflected that of a total of 8,871 surveyed plants, the highest degrees of severity were observed in Flordaking plants, followed by Opedepe and, finally, Rojo Dos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo: Em Jujuy existem 850 ha de pessegueiros (Prunus persica L.), nos vales temperados encontram-se cerca de 800 ha, onde há alguns anos começaram a se observar plantas com sintomas de amarelamento, avermelhamento, enrolamento e necrose de folhas, desfoliação prematura e encurtamento de entrenós, inclusive morte de plantas. O agente causal é o fitoplasma Argentinean Peach Yellows (ArPY), do subgrupo 16Sr III-B, X-disease. A doença é conhecida como &#8220;amarelamento do pessegueiro&#8221;, uma patologia em expansão, sem antecedentes no país, da qual é importante conhecer sua epidemiologia: presença e dispersão em variedades introduzidas e naturalizadas, caracterizar a sintomatologia e sua variação estacional, o que é parte dos objetivos deste trabalho. Mediante avaliações visuais realizadas na temporada 2018-2019, se estimou a incidência/prevalência desta patologia nos vales áridos e temperados. Em vales áridos e nos vales temperados altos não se registraram plantas com sintomas; nos vales temperados baixos se visualizaram plantas enfermas de ArPY e seu diagnóstico foi confirmado no laboratório. Foi observada variação estacional da sintomatologia: na primavera as plantas se apresentavam parcial ou totalmente afetadas, com encurtamento de entrenós, folhas em vassoura de bruxa, amarelamento, avermelhamento e enrolamento de folhas basais; no verão os 60% de ramas sintomáticas da primavera precedente, mortas ou em processo, sem novos sintomas; no outono morte de brindilas de ramas sintomáticas e desfoliação antecipada. De 25 lotes produtivos avaliados nas cultivares Flordaking, Opedepe e Rojo Dos, determinou-se uma prevalência de 100%. Os maiores valores de incidência foram registrados na cultivar Flordaking. Em relação à severidade, medida com uma escala de 6 graus, do total de plantas avaliadas (8.871), observaram-se os maiores graus em plantas de 'Flordaking', seguidas de 'Opedepe' e 'Rojo Dos'.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Argentinean Peach Yellows]]></kwd>
<kwd lng="en"><![CDATA[phytoplasma]]></kwd>
<kwd lng="en"><![CDATA[Prunus persica]]></kwd>
<kwd lng="en"><![CDATA[epidemiology]]></kwd>
<kwd lng="es"><![CDATA[Argentinean Peach Yellows]]></kwd>
<kwd lng="es"><![CDATA[fitoplasma]]></kwd>
<kwd lng="es"><![CDATA[Prunus pérsica]]></kwd>
<kwd lng="es"><![CDATA[epidemiología]]></kwd>
<kwd lng="pt"><![CDATA[Argentinean Peach Yellows]]></kwd>
<kwd lng="pt"><![CDATA[fitoplasma]]></kwd>
<kwd lng="pt"><![CDATA[Prunus pérsica]]></kwd>
<kwd lng="pt"><![CDATA[epidemiología]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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