Lentinellus micheneri

Lentinellus micheneri is a wood-decaying fungus belonging to the Russulaceae family. In the field of forest pathology, it is recognized as a pathogen capable of inducing structural degradation in wood. While often acting as a saprotroph, it frequently transitions to a parasitic role on stressed or aging hardwood trees, contributing significantly to forest ecosystem turnover.

The causative agent primarily affects broad-leaved trees. It typically enters the internal structure of the tree through bark wounds, frost cracks, or improper pruning cuts. As a type of white-rot fungus, it breaks down complex structural components of the wood, such as lignin and cellulose, which eventually leads to the structural instability of the trunk.

Symptoms of infection include the emergence of characteristic fruit bodies on the trunk or exposed root zones. Internally, the wood undergoes distinct color changes, typically turning bleached or yellowish with a fibrous, stringy texture. As the infection progresses, the structural integrity of the tree is severely compromised, often resulting in cavities or heart rot.

The development and spread of this fungus are heavily dependent on environmental conditions, specifically high humidity and moderate temperatures. The fungus propagates through spores dispersed by wind, which colonize suitable hosts. Dense, poorly ventilated stands provide the most favorable environment for the rapid colonization and spread of this pathogen.

The economic and biological damage caused by this fungus is significant, as it leads to the degradation of timber quality and the premature death of host trees.

• Implementation of systematic sanitation harvesting of infected specimens.
• Prevention of mechanical injuries to the trunks during maintenance.
• Removal of deadwood and stumps to reduce local inoculum.
• Maintenance of proper spacing to ensure adequate air circulation.