Nekróza jasanu Chalara fraxinea - fenologie, bionomie, charakteristika symptomy, rozšíření na revíru Běstvina, LS Nasavrky, LCR, s.p.

The population of common ash (Fraxinus excelsior) is decimated in most European countries a pathogenic fungus Chalara fraxinea. This is the main cause of decline and death of common ash. This thesis deals with occurrence and impact of this fungus on common ash forests in Železné Mountain. For comparison mortality stands were selected three sites. From the collected material on the sites was successfully isolated by the laboratory pathogen. Results of field monitoring showed that the damage is very serious and threatening to collapse populations of ash stands