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| Reis,Ailton; Boiteux,Leonardo S. |
| Fusarium wilt, caused by three races of Fusarium oxysporum f. sp. lycopersici, is one of the most important tomato diseases. In Brazil, all three races were reported, however, race 3 has been so far restricted only to Espírito Santo State. In the present work, seven F. oxysporum isolates obtained from wilted plants of the race 1 and 2-resistant tomato hybrids 'Giovana', 'Carmen' and 'Alambra' in São José de Ubá and Itaocara (Rio de Janeiro State, Brazil) were characterized at race level. Virulence assays were performed using a set of race differential cultivars: 'Ponderosa' (susceptible to all races), 'IPA-5' (resistant to race 1), 'Floradade' (resistant to races 1 and 2), 'BHRS-2,3' (resistant to all three races). Two wild tomato accessions (Solanum... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Lycopersicon; Fusuarium wilt; Pathogen variability. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362007000300025 |
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| Miranda,Bruno Eduardo Cardozo de; Suassuna,Nelson Dias; Reis,Ailton. |
| The objective of this work was to characterize 79 Phytophthora infestans isolates collected in tomato (Solanum lycopersicum) fields, as to mating type, mefenoxam sensitivity, and pathotype composition. The isolates were sampled in 2006 and 2007 in seven Brazilian states as well as in the Distrito Federal. They were characterised as to mating type (n=79), sensitivity to fungicide mefenoxam (n=79), and virulence to three major resistance genes Ph-1, Ph-2, and Ph-3/Ph-4 (n=62). All isolates were of the mating type A1. Resistant isolates were detected in all sampled states, and its average frequency was superior to 50%. No difference was detected in pathotype diversity, neither between subpopulations collected in 2006 and 2007 nor between isolates grouped as... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lycopersicon esculentum; Solanum lycopersicum; Disease management; Fungicide resistance; Late blight; Pathogen variability. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2010000700006 |
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| Reis,Ailton; Costa,Hélcio; Boiteux,Leonardo S.; Lopes,Carlos A.. |
| Fusarium wilt, caused by three races of Fusarium oxysporum f. sp. lycopersici, is one of the most important diseases of tomato (Lycopersicon esculentum). Races 1 and 2 are distributed worldwide whereas race 3 has a more limited geographic distribution with no report thus far in Brazil. Seven F. oxysporum isolates were obtained from wilted tomato plants of race 1 and 2-resistant hybrids 'Carmen' and 'Alambra' in Venda Nova do Imigrante (State of Espírito Santo), Brazil. Virulence assays were performed using a set of the race differential cultivars: 'Ponderosa' (susceptible to all races), 'IPA-5' (resistant to race 1), 'Floradade' (resistant to races 1 and 2) and 'BHRS-2,3' (resistant to race 3). All isolates were highly virulent to 'Ponderosa', 'IPA-5' and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fusarium wilt; Lycopersicon; Pathogen variability. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000400017 |
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