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Dieback of common ash is a worrying phenomenon that emerged in the early 1990s. The first symptoms were observed in 1992 in Poland. In 1996 the plague appeared in Lithuania, followed by Germany, Denmark, Czech Republic, Austria, Slovenia, Sweden and France (2002−2009), to finally reach the British Isles in 2012. At the beginning it was said about the disease of ash, but a few years later it became...
During 2008-2009 the analytical studies were conducted on the species composition of galls occurring on the leaves of Fraxinus excelsior L. in localities: the Ojców National Park and the Przedborski Protected Landscape. A total of 3788 galls, including 1897 in 2008, were found. The galls represented 5 maker-species: Phyllocoptes epiphyllus (Nal.) (Acarina, Eriophyidae), Psyllopsis fraxini L., Prociphilus...
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