1. 1 Poznań University of Life Sciences, Faculty of Forestry and Wood Technology , Department of Silviculture , Wojska Polskiego 71a , Poznań , Poland , phone: +48618487712
2. 2 Poznań University of Life Sciences, Faculty of Forestry and Wood Technology , Department of Forest Entomology and Pathology , Wojska Polskiego 71c , Poznań , Poland
3. 3 Landeskompetenzzentrum Forst Eberswalde , A. Möller Str.1 , Eberswalde , Germany