Antagonistic effect of fungi from Scots pine stump roots against Heterobasidion annosum and Armillaria ostoyae

Hanna Kwaśny

Abstract


The study presents quantitative and qualitative aspects of fungal colonization of the 2-year-old stump roots of the 30- and 49-year-old Scots pines, and biotic relations between fungi inhabiting the stump roots and major agent s of butt and root rot in Poland, i.e.: H. annosum and A. ostoyae. Compared to the live roots, the increase in density of fungi communities as well as the frequency of the fungi antagonistic towards H. annosum and A. ostoyae, particularly of Trichoderma species. in pine stump roots resulted in the increase of the suppressive effect of these communities towards both pathogens, studied in vitro. This finding may suggest a stronger resistance of pine stump roots to H. annosum and A. ostoyae what under forest conditions may be the example of natural control of both pathogens.

Keywords


antagonistic fungi; Armillaria ostoyae; Heterobasidion annosum; Scots pine roots; Trichoderma

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