Arachnopeziza aurata

Arachnopeziza aurata is a species of fungi belonging to the Hyaloscyphaceae family. Within the field of agronomy, it is often identified as a pathogen associated with the decay of woody tissues, primarily targeting trees and shrubs that are already weakened by environmental stress or poor management practices.

The causative agent acts as an opportunistic fungus. While primarily saprotrophic, it transitions to a parasitic stage when plant tissues are damaged or necrotic. This type of infection accelerates the degradation of the bark and phloem, which can compromise the structural integrity and nutrient transport systems of the host plant.

This fungus predominantly affects woody plants, including orchard trees, forest species, and ornamental shrubs. It thrives in neglected areas where deadwood is not promptly removed, as these remnants provide the necessary substrate for the fungus to complete its life cycle and produce persistent spores that infect surrounding plants.

Symptoms of the infection include the emergence of small, bright yellow or golden apothecia on the surface of branches and trunks. As the infection progresses, the surrounding bark tissue becomes discolored, necrotic, and brittle. In severe cases, the affected area may peel away, creating entry points for other secondary pathogens and pests.

Development and spread are facilitated by high humidity and moderate temperatures, which are common during spring and autumn. Spores are easily disseminated by wind and rain splashes. Effective protection involves rigorous sanitation: removing infected plant debris, maintaining optimal spacing for airflow, and applying protective coatings to pruning wounds to prevent fungal colonization.

• Prompt removal and destruction of infected twigs and branches.
• Regular pruning to improve crown ventilation and sunlight penetration.
• Application of antifungal pastes to major pruning cuts.
• Monitoring plant health to prevent pre-disposing stress factors.