01592nam a2200313 a 450000100080000000500110000800800410001902200140006010000190007424501140009326000520020752007280025965000140098765000120100165000110101365000140102465300110103865300210104965300130107065300210108365300260110470000200113070000310115070000180118170000250119970000160122470000250124070000130126521725452025-02-10       2024    bl uuuu     u00u1 u    #d  a1439-04341 aBARBOZA, E. A.  aPythium tracheiphilum causing leaf rot and wilting in lettuce in Brasília-DF, Brazil.h[electronic resource]  aJournal of Phutopathology, v. 172, e13334c2024  aPythium 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.  aOomycetes  aPythium  aAlface  aPatógeno  aMurcha  aNecrose vascular  aOomiceto  aPodridão foliar  aPythium tracheiphilum1 aLOPES, L. H. R.1 aPIRES-ZOTTARELLI, C. L. A.1 aCABRAL, C. S.1 aVIEIRA, W. A. dos S.1 aROSSATO, M.1 aMARTINS, F. H. S. R.1 aREIS, A.