The 5th Czech-Slovak Mycological conference was arranged on August 28-30th, 2017 at Masaryk University in Brno, organized by Czech Scientific Society for Mycology. Michal Tomšovský and Matěj Pánek took part at this konference. M. Tomšovský presented basic information about Phytophthora Research Centre, including research goals and activities for target group and partners. M. Pánek presented his results about Evolutionary relationships within the Phytophthora cactorum species in Europe.