In 2000 the analytical studies were conducted on the species composition of galls occurring on the leaves of Fagus sylvatica L. in three localities: the Wolski Forest - near an urban agglomeration of Kraków, the Ojców National Park and the Andrychów Forest District. A total of 3,391 galls, including 2,458 in the Andrychów FD, were found. The galls represented 5 maker-species. The species composition of galls was similar in all three localities. Acerria nerviscqua nervisequa (Canestrini) was the most abundant species. The index of occurrence frequency and the Agrell's index of species co-existence have been calculated.
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