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Subject: New Phytophthora species on Beech (Fagus sylvatica L.) in Italy
Date posted: July 24, 2003
Source: Plant Disease/August 2003
In autumn of 2001, cankers were discovered basally on the trunk of a declining tree in a stand of European beech (Fagus sylvatica L.) in Latium, Italy. A Phytophthora species was consistently isolated from the infected trunk bark. Electrophoretic banding patterns of mycelial proteins and isozymes of the beech isolates were distinct from those of the reference isolates of semipapillate Phytophthora species. The electrophoretic banding patterns, internal transcribed spacer (ITS)- restriction fragment length polymorphism (RFLP) pattern, and sequence of the beech isolates were identical to those of a reference isolate from Quercus cerris (Turkey Oak). Morphological, cultural, and ITS sequence characteristics suggest the isolate is a new, un-described species of Phytophthora. This new species was previously reported to be associated with decline of oak stands but this is the first reporting of it on beech in Italy.

For the full story see:
Motta, E. and T. Annesi. 2003. A New Phytophthora sp. Causing a Basal Canker on Beech in Italy. Plant Disease Vol. 87: 1005. (Full text available online with subscription at: http://www.apsnet.org/pd/current/top.asp)