摘要：Striking damaging agents on forest trees in
2005
Reports on outstanding damaging agents on forest trees in
Austria are given for the year 2005.
Dieback of young Fraxinus excelsior probably as a consequence
of spring frost in 2005, with the contribution of
microfungi Gloeosporidiella turgida, Diplodia mutila and
Phomopsis scobina, is reported from Lower Austria, Upper
Austria and Salzburg.
Decline of older Fraxinus excelsior suffering from sludge
deposition up to one meter after the flood in 2002, with
ash bark beetles contributing to the decline, is reported
from the riparian forests of the Danube in Lower Austria.
Scleroderris-disease (Gremmeniella abietina) and Diplodia-
dieback (Sphaeropsis sapinea), both related to hail
wounds are reported from a few sites in Tyrol and Vorarlberg.
In Christmas tree plantations Kabatina abietis has become
an increasing problem in some sites in Lower Austria.
Thysanophora penicillioides, first detected as a needle cast
fungus of Nordmanns fir in Austria in 2004, is probably
widespread but rarely changes from saprophytic to parasitic
occurrence.
