Acta Scientiarum Polonorum
Silvarum Colendarum Ratio et Industria Lignaria

Introduction. The process of European ash dieback emerged in 1992 in northeastern Poland. By 2012, the disease had spread throughout Europe. Two trends have been dominant in studies aiming to find an explanation for this phenomenon. One referred to the ecology of the species and abiotic conditions, while the other consisted in research concerning phytopathology and fungal genetics of Hymenoscyphus fraxineus, which is considered to be the main cause of ash dieback. Aim and materials. The paper aims to review results of current research related to the influence of habitat conditions on European ash dieback. The material was based on a review of journal articles and documents from various European countries as well as studies carried out in Poland. Conclusion. The review indicates that ash dieback is an extremely complex phenomenon, requiring further detailed research to confirm the observations showing diversification of the health state of European ash in various habitat conditions. The moisture content of habitats, soil conditions and species composition in the stand should be considered as particularly important.