Monitoring of Root and Butt Rots of Conifers in Young Plantations and Reserve Forests

1993

S. 187-188

Unselbständiges Werk

200077385

The ordinary methods of forest pathology were used for monitoring rot diseases in 34 experimental 5- to 30-year-old spruce (Picea abies) and pine Pinus sylvestris) plantations in some regions of Byelorussia, Lativa, Northwest Russia, and in native conifer stands of Beresin state reserve between 1981 and 1990. The results can be summarized as follows: (1) root and butt rots in young plantations are caused by Heterobasidion annosum, Armillaria mellea s.l., and Stereum sanguinolentum (only in spruce) in southern "taiga" zones and in mixed forests, although Heterobasidion annosum does not infect pine in the middle "taiga" zone of Karelia; (2) all pine and spruce plantations are divided into the three groups (a) stable for rots, (b) possibly susceptible, and (c) susceptible; (3) the old native stands are infected by Heterobasidion annosum, armillaria mellea s.l., Phellinus pini, Phellinus chrysoloma, Phaeolus schweinitzii, Abortiporus borealis and some other wood-rotting fungi; (4) the incidence and severity of root rot in old pine stands is to some extent an indicator of past anthropogenic influence on the forest ecosystem, traceable back to the period 1879-1890.