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The evidence-based hypothesis is presented that the stems and branches of Pinus sylvestris injured by lightning strikes are colonized first by Therrya fuckelii and successively by Diplodia pinea, Nectria fuckeliana, Hyaloscypha leuconica, Gremmeniella abietina and Cenangium ferruginosum. The concomitant occurrence of these usually pathogenic fungi on injured Pinus trees in Poland signals a potential for their increased significance in Europe during climatic changes.
The aim of this study was to analyse genetic diversity of H. annosum s. s. population in selected Scots pine stands with planted beech as a second floor or understorey, in Bolewice and Tuczno Forest Districts. In these stands the 14 genets of H. annosum s. s. were recognised. The biggest genet occupied 84 m2 and the smallest one colonized only one beech. The beech was attacked by pathogen similarly like Scots pine. The genetic diversity of H. annosum s. s. populations was high and the basidiospores played a major role in pathogen’s spreading process in studied stands.
Sylwan
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2000
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tom 144
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nr 04
115-121
The objective of the presented studies was the determination of Armillaria species causing root rot in stands growing in habitats of a higher fertility in the Siemianice Experimental Forest District. With the application of the mycelium intersterility test, the occurrence of A. gallica and A. ostoyae was found on the area of the mentioned Forest District, while in the nearby situated Mansion Park, Armillaria cepistipes was identified.
The aim of this study was the analysis of H. annosum s. s. stand infection and also the stumps colonization by P. gigantea and H. annosum a year after stumps inoculation with biopreparation. The study was conducted in 40-year-old Scots pine stand growing on the post arable soil, where two plots had been established. After commercial thinning the stumps treatment with P. gigantea was done. There were no sporocarps or mycelium of both H. annosum and P. gigantea on investigated stumps. The mycological analysis of wood showed that 64-72% stumps were colonized by P. gigantea and 14-17% by H. annosum. The mycelium of both fungi was also isolated from roots (34-42% colonized by H. annosum and 21-31% by P. gigantea). This study confirmed that stumps treatment in pine stands growing on the post arable soil plays the important role in avoiding the risk of Heterobasidion disease.
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