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The spreading of the S type of Heterobasidion annosum from Norway spruce stumps to the subsequent tree stand
Author(s) -
Piri Tuula
Publication year - 1996
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.1439-0329.1996.tb00839.x
Subject(s) - heterobasidion annosum , larch , pinus contorta , scots pine , picea abies , betula pendula , botany , biology , forestry , pinus <genus> , geography
Summary The occurrence of Heterobasidion annosum in stumps and growing trees was investigated on 15 forest sites in southern Finland where the previous tree stand had been Norway spruce ( Picea abies ) infected by H. annosum , and the present stand was either Scots pine ( Pinus sylvestris ), lodgepole pine ( Pinus contorta ), Siberian larch ( Larix siberica ), silver birch ( Betula pendula ) or Norway spruce 8–53 years old. Out of 712 spruce stumps investigated of the previous tree stand, 26.3% were infected by the S group and 0.3% by the P group of H. annosum . The fungus was alive and the fruit bodies were active even in stumps cut 46 years ago. In the subsequent stand, the proportion of trees with root rot increased in spruce stands and decreased in stands of other tree species. On average, one S type genet spreading from an old spruce stump had infected 3.0 trees in the following spruce stand, 0.5 trees in lodgepole pine, 0.3 trees in Siberian larch, 0.05 trees in Scots pine and 0.03 trees in silver birch stand. Although silver birch generally was highly resistant to the S type of H. annosum , infected trees were found on one site that was planted with birch of a very northern provenance.