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Das Rindensterben der Buche, Fagus sylvatica L., verursacht durch die Buchenwollschildlaus Cryptococcus fagi Bär.I. Die Anatomie der Buchenrinde als Basis‐Ursache
Author(s) -
Braun H. J.
Publication year - 1976
Publication title -
european journal of forest pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.535
H-Index - 49
eISSN - 1439-0329
pISSN - 0300-1237
DOI - 10.1111/j.1439-0329.1976.tb00518.x
Subject(s) - fagus sylvatica , beech , fagus orientalis , phloem , bark (sound) , biology , botany , ecology
Beech (Fagus sylvatica L.) bark disease, caused by Cryptococcus fagi Baer. I. Anatomy of bark of Fagus sylvatica L. as a basic factor . The bark of beech possesscs broad phlocm rays which become totally sclerotic. These sclerotic phloem rays are a spcciality of Fagus sylvatica L. (and Fagus orientalis Lipsky, Fagus grandilolia Ehrh.) Thc sclerotic phloem rays act as rigid, radially running barriers which block formation of a normal rhytidome. When formation of a rhytidome is induced artificially a necrotic pathological rhytìdome develops. The inability of beedi to form a normal and effectivc rhytidome due to sclerotic phloem rays is considcred to bc a basic factor in beech bark disease.