On initiative of the University of Padova we cooperated at determination of C. fraxinea in Italy. We confirmed the causative agent of ash decline in Italy and proved the pathogenicity of C. fraxinea with the inoculation test. The results were published in journal Plant Disease.
Described are the charactewristics of the fungus, which was isolated from diseased ashes from the whole territory of Slovenia. Morphological characteristics of the fungus in pure culture fit to the described species Chalara fraxinea. Performed Koch's postulates proved that the fungus is the cause of the disease. It provokes damages of leaves, leaf petioles, bark and discolourtion of wood.