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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,...
The aim of this work was 1) to investigate the genetic diversity of H. annosum s. str. populations, 2) to recognize genets ability of their aggressiveness to Scots pine. The genetic similarity among genets varied from 0% to 74%. Totally different genets were found in 17.9% of cases. The lowest similarity occurred among 20.7% of genets and it was calculated on 18%. Six months after inoculations of...
The aim of this study was to determine the virulence of H. parviporum genets with known genetic similarity and representing pathogen's population, which infested a part of Norway spruce stand. Genets caused average 47% mortality of spruce seedlings in infection experiment in vitro. The mortality rate varied from 16% to 80%. In infection experiment in vivo the mycelium of H. parviporum caused the wood...
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...
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...
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