Lachnum brevipilosum

Lachnum brevipilosum is a species of ascomycetous fungus belonging to the Hyaloscyphaceae family. It is primarily recognized for its small, hair-covered apothecia. In the context of arboriculture and forestry, it is generally considered a saprotrophic fungus that colonizes decaying organic matter, although it can act as a secondary pathogen on weakened trees.

This fungus typically impacts various deciduous woody species. It tends to colonize stems, branches, and bark tissues that have already lost their resistance due to abiotic factors such as frost, drought, or physical wounding. By breaking down cellulose and lignin, it facilitates the decomposition of dead woody materials within the ecosystem.

Symptoms of infestation are primarily characterized by the emergence of tiny, white to cream-colored cup-shaped fruit bodies on the surface of branches. The presence of these structures usually indicates that the affected tissue is already colonized and undergoing breakdown, which may exacerbate the decline of an already stressed plant.

Environmental conditions play a critical role in the growth and spread of the fungus. High moisture levels, combined with poor ventilation, are the primary drivers for sporulation and subsequent infection. Dense canopy structures or accumulated leaf litter in humid environments create an optimal microclimate for the development of the fungal life cycle.

Effective management and protection strategies include:

• Implementing regular sanitation protocols to remove dead and dying branches.
• Promoting proper airflow within orchards and nurseries through correct pruning.
• Maintaining optimal soil and tree health to boost natural plant resistance.
• Ensuring proper disposal or burning of infected plant debris to limit spore dispersal.