Trechispora cohaerens

The biology of the pathogen is characterized by the formation of thin, web-like hyphae that densely encircle the affected substrate. Sporulation occurs on the surface of the mycelium, where basidia with basidiospores are formed.

Although this species is primarily considered a xylotroph, under certain conditions, it can exhibit parasitic activity on weakened trees and shrubs.

The fungal mycelium has a high growth rate provided there is sufficient moisture and moderate temperatures. It is capable of deeply penetrating host tissues, breaking down cellulose and lignin.

This pathogen is frequently found in forest ecosystems but can pose a threat to orchards and nurseries if agricultural practices are neglected.

The primary symptom of infection is the appearance of a characteristic white or creamy crust-like coating on the surface of bark, wood, or plant debris.

The coating has a fine-grained or slightly flaky structure, which is associated with the development of the basidial layer during the fungus's active growth phase.

As the pathogen develops, the tissues of the affected plant may change color, becoming softer and more friable due to the degradation of cell walls.

In cases of woody plant infection, stunted growth, premature yellowing and leaf drop, and the dying back of individual branches are frequently observed.

• Development of a white fungal crust.
• Softening of affected plant tissues.
• Loss of turgor in shoots.
• Stunting of overall plant development.

The development of Trechispora cohaerens depends directly on the moisture of the substrate and the environment, as the fungus requires a constant supply of water for hyphal growth.

Optimal conditions for sporulation include temperatures between +15 and +22 degrees Celsius, typical of autumn or humid summer weather.

The accumulation of plant debris on a plot creates a favorable environment for spore overwintering and the primary infection of cultivated plants.

Weakened plants with mechanical bark injuries or frost cracks become primary targets for pathogen colonization.

Lack of ventilation in dense plantings also facilitates the formation of a microclimate with high humidity, which is essential for active sporulation.

The primary harmful impact is the weakening of the plant's immune system, making it vulnerable to a complex of secondary infections and pests.

When woody crops are affected, the transport of nutrients is disrupted, which leads to the gradual decline and death of the plant.

In nurseries, this fungus can cause root and collar rot, leading to the rejection of large quantities of planting material.

The pathogen is capable of spreading rapidly through spores, infecting new specimens under favorable weather conditions.

Economic losses consist of the costs associated with replacing dead plants and the implementation of quarantine and protective measures.

The main preventive measure is adherence to proper agronomic practices, including timely sanitary pruning and the removal of infected plant parts.

It is essential to maintain orchard cleanliness by regularly removing fallen leaves and plant debris that serve as reservoirs for the infection.

The application of copper-based fungicides or systemic chemical treatments allows for the effective suppression of mycelial growth in the early stages of infection.

Maintaining tree health through the application of balanced fertilizers and preventing mechanical damage to trunks is critical.

Ensuring optimal air circulation in orchards and greenhouses significantly reduces the risk of epiphytotics related to this fungal disease.