Pythium tracheiphilum causing leaf rot and wilting in lettuce in Brasília‐DF, Brazil

Pythium tracheiphilum is a narrow host range oomycete first described infecting lettuce in Italy. Subsequently, the pathogen was reported in many other countries. From 2015 to 2019, Pythium isolates were recovered from lettuce plants with symptoms of leaf rot, wilting and vascular necrosis, collecte...

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Bibliographic Details
Published inJournal of phytopathology Vol. 172; no. 3
Main Authors Barboza, Elenice Alves, Lopes, Luiz Henrique Rocha, Pires‐Zottarelli, Carmen Lidia Amorim, Cabral, Cléia Santos, Santos Vieira, Willie Anderson, Rossato, Maurício, Ribeiro, Fabiana Helena Silva, Reis, Ailton
Format Journal Article
LanguageEnglish
Published 01.05.2024
Subjects
Lactuca sativa
leaf rot
new disease
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Summary:Pythium tracheiphilum is a narrow host range oomycete first described infecting lettuce in Italy. Subsequently, the pathogen was reported in many other countries. From 2015 to 2019, Pythium isolates were recovered from lettuce plants with symptoms of leaf rot, wilting and vascular necrosis, collected from commercial fields in different rural localities of Brasilia‐DF, Brazil. The isolates were identified as P. tracheiphilum based on morphological and molecular genetic analysis. Pathogenicity tests conducted with four P. tracheiphilum isolates confirmed that the isolates were pathogenic to detached leaves of a loose‐hearted lettuce cultivar. This is the first report of P. tracheiphilum infecting lettuces in Brazil.
ISSN:0931-1785
1439-0434
DOI:10.1111/jph.13334