In the years 2006–2008, the occurrence of hyperparasites on rust of thickle plants growing in Drawsko and Szczecinek eutrophic lakes was investigated. Four species of hyperparasites of rust fungi were identified during the research. These were Ramularia coleosporii, R. uredinis, Sphaerellopsis filum and Tuberculina persicina. Hyperparasites of rust fungi were identified in eutrophic lakes Dolne and Wąsosze.
In 2006–2008, studies on occurrence of hyperparasites of Erysiphales pathogenic fungi to both cultivated and wild grown plants were carried out in the Lakeland of Bobolice. As a result of performed studies, 17 species of Erysiphales and 4 hyperparasite taxons were identified. The most commonly occurring hyperparasites were: Alternaria alternata, Alternaria sp. and Cladosporium sp., and they did not show any preference in relation to a host fungus species. However, the species Ampelomyces quisqualis showed a narrow range of host fungi, and was only identified on 8 species of Erysiphales. The most common host species fungus was Erysiphe cichoracearum, and A. quisqualis was found to parasite mycelium, conidia and occasionally young cleistothecia.