<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santos, A. F. dos</style></author><author><style face="normal" font="default" size="100%">Luz, EDMN</style></author><author><style face="normal" font="default" size="100%">Reis, A.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Phytophthora spp: distribuição e associação com espécies florestais</style></title><secondary-title><style face="normal" font="default" size="100%">Congresso Brasileiro de Fitopatologia, 47</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.alice.cnptia.embrapa.br/handle/doc/993792</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Sociedade Brasileira de Fitopatologia</style></publisher><pub-location><style face="normal" font="default" size="100%">Londrina, Brazil</style></pub-location><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santos, A. F. dos</style></author><author><style face="normal" font="default" size="100%">Luz, E. D. M. N.</style></author><author><style face="normal" font="default" size="100%">Souza, J. T.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">First report of Phytophthora boehmeriae on black wattle in Brazil</style></title><secondary-title><style face="normal" font="default" size="100%">Plant Pathology</style></secondary-title><short-title><style face="normal" font="default" size="100%">Plant Pathology</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2006</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-12-2006</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2006.01462.x/full</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">55</style></volume><pages><style face="normal" font="default" size="100%">813 - 813</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Black wattle (&lt;em&gt;Acacia mearnsii&lt;/em&gt;) is an Australian tree species cultivated in several countries. In Brazil, particularly in Rio Grande do Sul State (RS), approximately 140&amp;nbsp;000 ha are cultivated for tannin extraction (&lt;a class=&quot;link__reference js-link__reference&quot; title=&quot;Link to bibliographic citation&quot; href=&quot;http://onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2006.01462.x/full#b1&quot; rel=&quot;references:#b1&quot;&gt;Dos Santos &lt;em&gt;et&amp;nbsp;al&lt;/em&gt;., 2005&lt;/a&gt;).&lt;/p&gt;&lt;p&gt;The gummosis complex, which has &lt;em&gt;Phytophthora nicotianae&lt;/em&gt; as one of the causal agents, is the main disease of black wattle in Brazil and is characterised by lesions at the trunk base with gum exudation (&lt;a class=&quot;link__reference js-link__reference&quot; title=&quot;Link to bibliographic citation&quot; href=&quot;http://onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2006.01462.x/full#b1&quot; rel=&quot;references:#b1&quot;&gt;Dos Santos &lt;em&gt;et&amp;nbsp;al&lt;/em&gt;., 2005&lt;/a&gt;). Different symptoms were observed in plantations at the municipality of Piratini, RS (southern Brazil) and were characterised by dark lesions without gum exudation on trunks of 3- to 4-year-old wattle trees up to 10 m height. Isolates of &lt;em&gt;Phytophthora&lt;/em&gt; spp. were obtained from the lesions and deposited in the Brazilian collection of &lt;em&gt;Phytophthora&lt;/em&gt; species, under accession numbers CBP 307, 308 and 309. Sporangia of all isolates were ovoid to spherical, papillate and caducous, measuring 35 µm ± 1·42 × 30 µm ± 1·37, with a length/width ratio of 1·16:1, mean depth of papillae of 4·83 µm ± 0·04, and pore exit of 4·69 µm ± 0·04. The isolates were homothallic, forming plerotic oospores with smooth walls and amphigynous antheridia. The ITS sequences obtained for isolates CBP 307 (&lt;a class=&quot;accessionId&quot; title=&quot;Link to external resource: AY428533&quot; href=&quot;http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&amp;amp;db=Nucleotide&amp;amp;dopt=GenBank&amp;amp;term=AY428533&quot; target=&quot;_blank&quot;&gt;AY428533&lt;/a&gt;), CBP 308 (&lt;a class=&quot;accessionId&quot; title=&quot;Link to external resource: AY428534&quot; href=&quot;http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&amp;amp;db=Nucleotide&amp;amp;dopt=GenBank&amp;amp;term=AY428534&quot; target=&quot;_blank&quot;&gt;AY428534&lt;/a&gt;), and CBP 309 (&lt;a class=&quot;accessionId&quot; title=&quot;Link to external resource: AY428535&quot; href=&quot;http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&amp;amp;db=Nucleotide&amp;amp;dopt=GenBank&amp;amp;term=AY428535&quot; target=&quot;_blank&quot;&gt;AY428535&lt;/a&gt;) were identical and most closely matched those of two isolates of &lt;em&gt;P. boehmeriae &lt;/em&gt;&lt;a class=&quot;accessionId&quot; title=&quot;Link to external resource: KACC40173&quot; href=&quot;http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&amp;amp;db=Nucleotide&amp;amp;dopt=GenBank&amp;amp;term=KACC40173&quot; target=&quot;_blank&quot;&gt;KACC40173&lt;/a&gt; (&lt;a class=&quot;accessionId&quot; title=&quot;Link to external resource: AY228076&quot; href=&quot;http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&amp;amp;db=Nucleotide&amp;amp;dopt=GenBank&amp;amp;term=AY228076&quot; target=&quot;_blank&quot;&gt;AY228076&lt;/a&gt;) from Korea and &lt;a class=&quot;accessionId&quot; title=&quot;Link to external resource: SCRP23&quot; href=&quot;http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&amp;amp;db=Nucleotide&amp;amp;dopt=GenBank&amp;amp;term=SCRP23&quot; target=&quot;_blank&quot;&gt;SCRP23&lt;/a&gt; (&lt;a class=&quot;accessionId&quot; title=&quot;Link to external resource: DQ297406&quot; href=&quot;http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&amp;amp;db=Nucleotide&amp;amp;dopt=GenBank&amp;amp;term=DQ297406&quot; target=&quot;_blank&quot;&gt;DQ297406&lt;/a&gt;) from China. This and the morphological similarity (&lt;a class=&quot;link__reference js-link__reference&quot; title=&quot;Link to bibliographic citation&quot; href=&quot;http://onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2006.01462.x/full#b2&quot; rel=&quot;references:#b2&quot;&gt;Erwin &amp;amp; Ribeiro, 1996&lt;/a&gt;) suggest that these isolates are &lt;em&gt;P. boehmeriae&lt;/em&gt;. However, seven clear single base pair differences were noted between the Brazilian and other &lt;em&gt;P. boehmeriae&lt;/em&gt; isolates. This, combined with isozyme variation (&lt;a class=&quot;link__reference js-link__reference&quot; title=&quot;Link to bibliographic citation&quot; href=&quot;http://onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2006.01462.x/full#b3&quot; rel=&quot;references:#b3&quot;&gt;Oudemans &amp;amp; Coffey, 1991&lt;/a&gt;) suggests that further studies are needed to confirm the taxonomic status of &lt;em&gt;P. boehmeriae&lt;/em&gt;.&lt;/p&gt;&lt;p&gt;Pathogenicity tests were done by inoculating five 1-year-old wattle plants with 7 mm mycelial discs of 5-day old cultures of the three isolates used in this study. The mycelial discs were placed in 7 mm diameter holes made in the bark with a cork borer, at 5 cm above the soil. Plants were maintained at approximately 25°C and were assessed 45 days after inoculation. All three isolates were pathogenic to black wattle and were re-isolated from the lesions.&lt;/p&gt;&lt;p&gt;&lt;em&gt;Phytophthora boehmeriae&lt;/em&gt; was reported as one of the causal agents of the gummosis complex on black wattle in South Africa (&lt;a class=&quot;link__reference js-link__reference&quot; title=&quot;Link to bibliographic citation&quot; href=&quot;http://onlinelibrary.wiley.com/doi/10.1111/j.1365-3059.2006.01462.x/full#b4&quot; rel=&quot;references:#b4&quot;&gt;TPCP, 2004&lt;/a&gt;) and is of quarantine importance for the citrus industry in Brazil. This is the first report of the involvement of &lt;em&gt;P. boehmeriae&lt;/em&gt; in the aetiology of the gummosis complex of black wattle in Brazil.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">6</style></issue></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santos, A. F. dos</style></author><author><style face="normal" font="default" size="100%">Grigoletti, A. Jr.</style></author><author><style face="normal" font="default" size="100%">Auer, CG</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">O complexo gomose da acácia-negra</style></title><secondary-title><style face="normal" font="default" size="100%">Colombo-PR: Embrapa Florestas</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2001</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://core.ac.uk/download/pdf/15427678.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">Circular Técnica, 44</style></volume><pages><style face="normal" font="default" size="100%">8 pp.</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A acácia-negra é uma espécie florestal que foi introduzida no Brasil, no Estado do Rio Grande do Sul, na década de 30. Atualmente, com uma área plantada de aproximadamente 100.000 ha, envolve cerca de 10 mil pequenos produtores rurais (Higa &amp;amp; Dedecek, 1999), compondo um dos maciços florestais daquele Estado, onde desempenha importante papel sócio-econômico para as pequenas propriedades rurais (Fleig, 1993).&lt;/p&gt;&lt;p&gt;O rápido crescimento da acácia-negra, associado ao aproveitamento integral da madeira, torna essa espécie ideal para reflorestamento e para utilização industrial. Sua contribuição aos mais variados segmentos econômicos e industriais é ampla, tanto pelo aproveitamento da casca para extração do tanino (a casca possui cerca de 28% de tanino), quanto pelo uso da madeira para diversos fins, tais como a fabricação de papel e celulose, chapas de aglomerados, carvão e lenha. No Brasil, é plantada principalmente para produção de tanino.&lt;/p&gt;&lt;p&gt;A acácia-negra é uma planta que exsuda goma na casca do tronco. A goma é aparentemente produzida pelas árvores em resposta a alguma condição anormal, como patógenos ou injúrias provocadas por insetos, danos mecânicos ou fatores externos que afetam o seu crescimento (Zeijlemaker, 1968). Quimicamente, a goma da acácia-negra é uma combinação de arabinose, galactose, ramnose e ácido glucurônico (Stephen 1951). A quantidade de goma produzida por uma árvore depende da característica genética do material e da influência de fatores ambientais, tais como a temperatura e a disponibilidade de umidade.&lt;/p&gt;&lt;p&gt;Como resultado, tem-se pouca goma no período seco, enquanto muita goma pode ser exsudada no período úmido (Zeijlemaker, 1968). Um dos principais problemas da acácia-negra é a doença conhecida como gomose de &lt;em&gt;Phytophthora &lt;/em&gt;sp. (Santos et al., 1998). Os sintomas ocorrem no tronco e se caracterizam por lesões necróticas na casca, chegando a atingir o lenho. A abundante exsudação gomosa é o sintoma mais característico dessa doença, que é facilmente confundido com outros problemas, uma vez que o tronco da acácia-negra exsuda goma quando lesionado por ação tanto biótica quanto abiótica. Assim sendo, embora a lesão exsudativa seja o tipo de sintoma mais característico da gomose de &lt;em&gt;Phytophthora&lt;/em&gt;, essa não é uma característica exclusiva como indicadora da associação &lt;em&gt;Phytophthora &lt;/em&gt;-acácia. Portanto, este trabalho tem o objetivo de discutir aspectos relacionados à gomose de &lt;em&gt;Phytophthora &lt;/em&gt;e aos de outros tipos de problemas associados à acácia-negra e que tenham a exsudação de goma como parte de seu quadro sintomatológico, de maneira que se possam elucidá-los, para facilitar a sua identificação no camp.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santos, A. F. dos</style></author><author><style face="normal" font="default" size="100%">Luz, Edna Dora. M. N.</style></author><author><style face="normal" font="default" size="100%">Finato, Priscila D.</style></author><author><style face="normal" font="default" size="100%">Tessmann, Dauri J.</style></author><author><style face="normal" font="default" size="100%">Vida, J. B.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Primeiro relato da podrida da estipe da pupunheira, causada por Phytophthora palmivora, no estado do Parana‘</style></title><secondary-title><style face="normal" font="default" size="100%">Fitopatologia Brasileira</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2004</style></year><pub-dates><date><style  face="normal" font="default" size="100%">12</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.scielo.br/scielo.php?script=sci_arttext&amp;pid=S0100-41582004000600016&amp;nrm=iso</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">scielo</style></publisher><volume><style face="normal" font="default" size="100%">29</style></volume><pages><style face="normal" font="default" size="100%">680 - 682</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;em&gt;Phytophthora palmivora&lt;/em&gt; was isolated from infected peach palm (&lt;em&gt;Bactris gasipaes&lt;/em&gt;) plants with stem rot symptoms in Paraná State, in 2002. Pathogenicity tests and subsequent reisolations of &lt;em&gt;P. palmivora&lt;/em&gt; confirmed the hypothesis that this fungus was the causal agent of the disease. This is the first report of &lt;em&gt;P. palmivora&lt;/em&gt; causing stem rot on peach palm (&lt;em&gt;Bactris gasipaes&lt;/em&gt;) in the southern State of Paraná. RESUMO &lt;em&gt;Phytophthora palmivora&lt;/em&gt; foi isolado de plantas de pupunheira (&lt;em&gt;Bactris gasipaes&lt;/em&gt;) com sintomas de podridão da estipe, no Paraná, em 2002. Testes de patogenicidade e o subseqüente reisolamento do fungo confirmaram a hipótese de que &lt;em&gt;P. palmivora&lt;/em&gt; é o agente causal da podridão do estipe. Este é o primeiro relato de &lt;em&gt;P. palmivora&lt;/em&gt; causando podridão do estipe na pupunheira no estado do Paraná.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santos, A. F. dos</style></author><author><style face="normal" font="default" size="100%">Luz, E.D.M.N.</style></author><author><style face="normal" font="default" size="100%">Maffia, L.A.</style></author><author><style face="normal" font="default" size="100%">Souza, J.T.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Gomose da acácia-negra: etiologia, análise temporal, perdas e controle genético.</style></title><secondary-title><style face="normal" font="default" size="100%">Boletim de Pesquisa e Desenvolvimento, Embrapa  Florestas, Ministério  da  Agricultura</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.infoteca.cnptia.embrapa.br/infoteca/bitstream/doc/312305/1/BPD31CD.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">31</style></volume><pages><style face="normal" font="default" size="100%">28 p.</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Gummosis is one of the most serious phytosanitary problems of black wattle (&lt;em&gt;Acacia mearnsii&lt;/em&gt;) in the State of Rio Grande do Sul, Brazil. The objectives of this work were: 1) to identify the species of &lt;em&gt;Phytophthora &lt;/em&gt;associated with gummosis; 2) to analyze the temporal distribution of the gummosis; 3) to quantify losses caused by this disease; and 4) to rank black wattle lines based on resistance to gummosis. The major results were: &lt;em&gt;Phytophthora nicotianae &lt;/em&gt;and &lt;em&gt;P. boehmeriae &lt;/em&gt;are the causal agent of gummosis on black-wattle in Brazil. This disease was found in all the surveyed black-wattle plantations and the species &lt;em&gt;P. nicotianae&lt;/em&gt; was the major species found in the samples, suggesting that this is the main species causing this disease in Brazil. It was found two kinds of symptoms: 1) gummosis at the base of the trunks, associated to &lt;em&gt;P. nicotianae&lt;/em&gt;; e 2) gummosis spread on the trunk, associated to &lt;em&gt;P. boehmeriae&lt;/em&gt;. Plants killed by gummosis or other causes showed exponential growth, and started to die after 34 months. Plants showing gummosis had losses ranging from 3,5 to 0,5% for bark and timber production, respectively. Both, natural and artificial inoculations assays showed variation on the resistance of plants to gummosis.&lt;/p&gt;&lt;p&gt;A gomose é um dos mais sérios problemas fitossanitários da acácia-negra (Acacia mearnsii) no Rio Grande do Sul. Este trabalho teve como objetivos: 1) identificar a(s) espécie(s) de Phytophthora associada(s) à gomose; 2) analisar a distribuição temporal da gomose; 3) quantificar as perdas causadas pela doença; e 4) agrupar os materiais genéticos de acácia-negra de acordo com o nível de resistência à gomose. Os principais resultados foram: Phytophthora nicotianae e P.boehmeriae são os agentes causais da gomose da acácia-negra no Brasil. A gomose de Phytophthora foi encontrada em todos os plantios de acácia-negra e, no levantamento, evidenciou-se a predominância de P. nicotianae, mostrando que este patógeno é o principal agente da gomose da acácia-negra no Brasil. As avaliações em plantios comerciais em idade de corte apresentaram até 48 % de indivíduos atacados. Tanto plantas mortas por outras causas quanto plantas mortas por gomose cresceram exponencialmente, e as mortes começaram a partir do 34º mês. Os dados mostraram perdas de produção de até 3,5 % para casca e até 0,5 % para madeira nas árvores com gomose. Tanto por infecção natural quanto por inoculação artificial, ocorreram variações entre as procedências quanto a resistência à gomose.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santos, A. F. dos</style></author><author><style face="normal" font="default" size="100%">Tessmann, Dauri J.</style></author><author><style face="normal" font="default" size="100%">Alves, Tatiane C. A.</style></author><author><style face="normal" font="default" size="100%">Vida, João B.</style></author><author><style face="normal" font="default" size="100%">Harakava, Ricardo</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Root and crown rot of Brazilian pine (Araucaria angustifolia) caused by Phytophthora cinnamomi</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Phytopathology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">chromistan fungi</style></keyword><keyword><style  face="normal" font="default" size="100%">forest pathology</style></keyword><keyword><style  face="normal" font="default" size="100%">fungal plant pathogen</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1111/j.1439-0434.2010.01741.x</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">3</style></number><publisher><style face="normal" font="default" size="100%">Blackwell Publishing Ltd</style></publisher><volume><style face="normal" font="default" size="100%">159</style></volume><pages><style face="normal" font="default" size="100%">194–196</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;In an area reforested with Brazilian pine (&lt;em&gt;Araucaria angustifolia&lt;/em&gt;) located in Paran√° State, southern Brazil, 20- to 40-year-old trees representing 0.2% of the surveyed area had symptoms of root and crown rot, yellowing and browning of leaves from the uppermost branches and death. Three &lt;em&gt;Phytophthora&lt;/em&gt; isolates obtained from diseased plant tissue were tested against 1-year-old Brazilian pine seedlings and found to display positive pathogenicity. Based on their morphological and physiological characteristics, the isolates were identified as &lt;em&gt;Phytophthora cinnamomi&lt;/em&gt;. A GenBank BLAST search of partial sequences from the β-tubulin and elongation factor-1α genes, as well as the ITS regions and 5.8S gene of rDNA, confirmed the species identification. This is the first report of the involvement of this pathogen on the aetiology of Brazilian pine root and crown rot.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santos, A. F. dos</style></author><author><style face="normal" font="default" size="100%">Luz, EDMN</style></author><author><style face="normal" font="default" size="100%">Souza, J. T.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Phytophthora nicotianae: agente etiológico da gomose da acácia negra no Brasil</style></title><secondary-title><style face="normal" font="default" size="100%">Fitopatologia Brasileira</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2005</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://doi.org/10.1590/s0100-41582005000100015 </style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">30</style></volume><pages><style face="normal" font="default" size="100%">81–4</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A gomose, causada por &lt;em&gt;Phytophthora&lt;/em&gt; sp., é a mais importante enfermidade da acácia-negra (&lt;em&gt;Acacia mearnsii&lt;/em&gt;) no Rio Grande do Sul, Brasil. A identificação específica permanecia indeterminada. Procurou-se, então, identificar a espécie de &lt;em&gt;Phytophthora&lt;/em&gt; causadora desta doença no Rio Grande do Sul, usando características fisiomorfológicas e estudos moleculares baseados no seqüenciamento das regiões de Internal Transcribed Spacer (ITS). A patogenicidade dos isolados estudados para a acácia-negra foi confirmada. Os estudos confirmaram &lt;em&gt;Phytophthora nicotianae&lt;/em&gt; como a correta identidade dos isolados fitopatogênicos. Este é o primeiro relato de P. nicotianae em acácia-negra no Brasil. &lt;br /&gt; &lt;br /&gt; Gummosis caused by &lt;em&gt;Phytophthora&lt;/em&gt; sp. is the most important disease of black wattle (&lt;em&gt;Acacia mearnsii&lt;/em&gt;) in Rio Grande do Sul, Brazil. Isolates of &lt;em&gt;Phytophthora&lt;/em&gt; sp. associated with diseased plants were obtained from Rio Grande do Sul and their pathogenicity was confirmed. In order to elucidate the correct identity of the fungus at the species level physiomorphological characteristics were determined and molecular studies were conducted based on sequences of Internal Transcribed Spacer (ITS) region. The fungus was identified as &lt;em&gt;Phytophthora nicotianae&lt;/em&gt;. This is the first report of &lt;em&gt;P. nicotianae&lt;/em&gt; on black wattle in Brazil.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santos, A. F. dos</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Comportamento diferenciado da gomose de Phytophthora em diferentes alturas ao longo de troncos de acácia-negra (Acacia mearnsii) em Piratini, RS</style></title><secondary-title><style face="normal" font="default" size="100%">Boletim de Pesquisa Florestal </style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2001</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://ainfo.cnptia.embrapa.br/digital/bitstream/CNPF-2009-09/30242/1/santos.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">43</style></volume><pages><style face="normal" font="default" size="100%">145-149</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The symptoms of gummosis of &lt;em&gt;Phytophthora&lt;/em&gt; of black wattle (&lt;em&gt;Acacia mearnsii&lt;/em&gt;) occur&amp;nbsp; predominantly&amp;nbsp; in&amp;nbsp; the&amp;nbsp; basal&amp;nbsp; region of&amp;nbsp; the&amp;nbsp; trunk.&amp;nbsp; The&amp;nbsp; highest&amp;nbsp; severity&amp;nbsp; is usually observed in the basal section (up to 0,50 m from ground level, along the trunk). Black wattle gummosis was observed in trees growing at Piratini, RS, in 1998. In this case, a different kind of symptoms was observed: necrotic lesions occurring severily in heights above the basal section of the trunks. &lt;em&gt;Phytophthora&lt;/em&gt; was isolated from diseased bark from differents heights of the trunk up to 10 m. All isolates of &lt;em&gt;Phytophthora&lt;/em&gt; showed&amp;nbsp; pathogenicity to black wattle.&lt;/p&gt;&lt;p&gt;Os sintomas da gomose de &lt;em&gt;Phytophthora&lt;/em&gt; da acácia-negra (&lt;em&gt;Acacia mearnsii&lt;/em&gt;) ocorrem predominantemente na região basal do tronco das árvores, com maior severidade na porção que vai do colo até 0,50 m de altura. No ano de 1998, na região de Piratini-RS, ocorreu um surto de gomose em árvores adultas, caracterizando-se pela predominância de lesões necróticas, não exsudativas, atingindo severamente alturas superiores àquelas normalmente encontradas nos troncos. Procedeu-se a uma coleta sistematizada de amostras de casca de troncos de árvores com sintomas, na região do colo, aos 2 m, aos 4 m, aos 6 m, aos 8 m e aos 10 m de altura. Nos isolamentos e testes de patogencidade feitos, confirmouse a associação de &lt;em&gt;Phytophthora&lt;/em&gt; às lesões.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Santos, A. F. dos</style></author><author><style face="normal" font="default" size="100%">Luz, E. D. M. N.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">A gomose da acácia-negra no Brasil: a review</style></title><secondary-title><style face="normal" font="default" size="100%">Summa Phytopathologica</style></secondary-title><short-title><style face="normal" font="default" size="100%">Summa phytopathol.</style></short-title></titles><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Jan-01-2007</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://doi.org/10.1590/s0100-54052007000200002 </style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">33</style></volume><pages><style face="normal" font="default" size="100%">113 - 118</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;font-family: Verdana; font-size: small;&quot;&gt;A acácia-negra (&lt;em&gt;Acacia mearnsii&lt;/em&gt;) é cultivada no Brasil, especialmente no Estado do Rio Grande do Sul, visando tanto à produção de tanino, a partir da casca, quanto o uso da madeira para papel, celulose, carvão, lenha e chapas de aglomerados. A gomose causada por &lt;em&gt;Phytophthora nicotianae&lt;/em&gt; e &lt;em&gt;P. boehmeriae&lt;/em&gt;, é o seu principal problema fitossanitário&lt;em&gt;. &lt;/em&gt; Discute-se nesta revisão a existência de dois padrões distintos de sintomatologia da gomose de &lt;em&gt;Phytophthora &lt;/em&gt;que têm sido observados nas plantações brasileiras: gomose basal, associada a &lt;em&gt;P. nicotianae&lt;/em&gt;, e gomose generalizada, mais associada a &lt;em&gt;P. boehmeriae&lt;/em&gt;. São discutidos aspectos relacionados à etiologia, à epidemiologia e às estratégias de controle.&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span style=&quot;font-family: Verdana; font-size: small;&quot;&gt;&lt;span style=&quot;font-family: Verdana; font-size: small;&quot;&gt;The black wattle (&lt;em&gt;Acacia mearnsii&lt;/em&gt; ) is cultivated in Brazil for bark tannin, paper, cellulose, plywood, charcoal and firewood production. Gummosis of &lt;em&gt;Phytophthora&lt;/em&gt;, caused by &lt;em&gt;P. nicotianae&lt;/em&gt; and &lt;em&gt;P. boehmeriae&lt;/em&gt; is the main disease problem on black wattle. The existence of two distinct symptom patterns observed on plants in the commercial fields are: butt gummosis which is associated with &lt;em&gt;P. nicotianae&lt;/em&gt; and general gummosis more related to &lt;em&gt;P. boehmeriae&lt;/em&gt;. Etiological, epidemiological and control aspects of this disease are presented and discussed on this review. &lt;/span&gt;&lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">2</style></issue></record></records></xml>