First occurrence of tomato leaf mold caused by the novel races 2.5.9 and 4.5.9 of Passalora fulva in Japan

Abstract

Tomato cultivar Reiyo, that possesses Cf-9 among other resistance genes but lacks Cf-4, was newly found to be infected with a novel race of the leaf mold pathogen, Passalora fulva after pale to olive mycelia were first observed on chlorotic spots on abaxial leaf surfaces in Tochigi Prefecture, Japan, 2011. In this study, we identified the isolates as races 2.5.9 and 4.5.9. To our knowledge, this is the first report of these races in Japan.