First report of Diplocarpon mali in the Czech Republic
In the Czech Republic, Diplocarpon mali (EPPO Alert List) was first found in October 2015 during an official pest specific survey. The fungus was found in an extensively managed apple (Malus domestica) orchard located in the Olomouc region. Further surveys conducted from July to September 2016 showed that D. mali was widely distributed across the Czech territory, as it was found in the following 8 regions: Hradec Kralove, Karlovy Vary, Liberec, Plzen, Prague, South Moravia, Usti nad Labem, and Zlin. In infected orchards, only leaf spot symptoms were observed and no economic damage was reported. As D. mali is now widespread and does not appear to cause economic damage, the Czech NPPO concluded that no official phytosanitary measures were necessary.
The pest status of Diplocarpon mali in the Czech Republic is officially declared as: Present, in all parts of the Czech Republic.
Sources
NPPO of the Czech Republic (2016-12).