Scytinostroma galactinum

Systematic position and pathogen type: Scytinostroma galactinum belongs to the kingdom Fungi, phylum Basidiomycota, class Agaricomycetes, order Russulales. It is a wood-decaying fungus characterized as a facultative parasite that primarily acts as an agent of white rot in woody plant species.

Diseases and host crops: This pathogen is responsible for white root and butt rot in various trees. It primarily affects coniferous trees, particularly spruce and fir species. The infection targets the root system and the base of the stem, leading to the decay of structural wood and compromising the tree's stability.

Biology and life cycle: The fungus produces crust-like basidiocarps, which are usually thin and membranous. It reproduces through basidiospores that are dispersed by wind. Once the spores germinate, the mycelium penetrates the wood through bark wounds or root grafts, breaking down lignin and cellulose components.

Conditions for development and spread: Scytinostroma galactinum thrives in environments with high moisture levels and mild temperatures. It exhibits high saprotrophic capability, allowing it to persist for many years within infected stumps and woody debris, acting as a permanent source of inoculum for surrounding healthy trees.

Harmfulness and control measures: The pathogen causes significant economic losses by reducing timber quality and leading to tree windthrow and mortality. Management strategies focus on mitigating the impact of the disease through the following actions:

• Implementation of strict sanitary logging to remove infected trees.
• Stump removal to minimize the spread of the fungus via root contact.
• Minimizing soil compaction and root damage during forest maintenance.
• Application of biological control agents on freshly exposed wood surfaces.