EN
Results of the study on damage insects infestation of Sorbus aucuparia L. fruits in the lower, middle and upper parts of tree crown, namely: Argyresthia conjugella Zell, Hoplocamba alpina Zett, and Megastigmus brevicaudis Ratz. are given. The most numerous insect proved to be A. conjugella — 4,114 individuals (a total of obtained insects 4,198 individuals). During the study period no correlation between number of A. conjugella infestation of fruits and the part of rowan-tree crown was found. The fruits (a total of 20,836) were collected from 30 growing rowan-trees in the Ojców National Park on the same four localities in 1996-1997.