Trametes hoehnelii

Trametes hoehnelii is a species of wood-decaying fungi belonging to the Polyporaceae family. It acts as a causative agent of intensive white rot in wood, primarily affecting deciduous trees in warm and humid climates. The fungus typically exhibits a saprotrophic lifestyle, though it can also act as a weak parasite, entering tree tissues through damaged bark or fresh pruning cuts.

The main cultures susceptible to this infestation include various deciduous trees, including fruit species in poorly maintained orchards. The fungal mycelium aggressively breaks down lignin and cellulose, which leads to a rapid loss of structural integrity in the timber. In horticulture, this decay can become a critical factor, leading to the death of weakened or damaged trees.

Symptoms of infection include the appearance of fungal fruiting bodies on trunks and branches, characterized by their specific shape and texture. The wood in the infected area becomes light, fibrous, and brittle, significantly losing its original density. Internally, the affected tissue often shows signs of advanced decay, turning a distinct whitish or yellowish color.

The development of this pathogen is favored by high atmospheric humidity and an abundant supply of decaying organic matter. Fungal spores are easily disseminated by wind, insects, or pruning tools. Optimal conditions for spore germination are typically met at temperatures ranging from +20 to +28 degrees Celsius, combined with a lack of proper bark care and tree sanitation.

Protection measures require strict adherence to standard agronomic practices: timely sanitary pruning, sealing pruning wounds with horticultural wax, and the removal of infected wood debris. Preventing the spread of the fungus requires the sterilization of tools after contact with infected specimens. In cases of severe infestation, the application of broad-spectrum fungicides designed for wood-decaying pathogens is recommended.