Abortiporus

Abortiporus is a genus of fungi belonging to the Meripilaceae family, primarily known for causing white rot in woody plants. The most common species, Abortiporus biennis, acts as both a pathogen and a saprotroph, attacking the structural tissues of trees and significantly reducing their life expectancy.

The disease is characterized by the degradation of lignin and cellulose, which are the main components of wood. The infection typically enters through wounds in the bark, broken branches, or damage to the root collar. Once established, the mycelium spreads internally, causing a systemic decay that compromises the plant's vascular system.

This fungus predominantly affects deciduous trees, including fruit-bearing orchard species and various forest hardwoods. It thrives in environments with high humidity and poor soil drainage, which often lead to root vulnerability, providing an entry point for fungal spores to colonize the tree.

Symptoms often manifest as the formation of unique, irregular, or fused fruiting bodies at the base of the trunk or on roots. Inside the wood, the disease creates a distinct white rot, where the timber loses its density, becomes brittle, and eventually turns soft or fibrous. In advanced stages, the tree becomes structurally unstable.

• Conducting regular health inspections of tree trunks and roots.
• Pruning damaged or dead branches to prevent opportunistic fungal entry.
• Applying professional wound sealants to major cuts and pruning wounds.
• Improving soil aeration and drainage to prevent root stress.
• Removing and destroying severely infected wood to reduce spore load.

The economic impact of Abortiporus is significant, particularly in fruit orchards and urban forestry, where tree stability is critical. Because the internal rot is often invisible until the fruiting bodies appear, early detection is difficult. Therefore, maintaining tree vitality through proper fertilization and stress reduction is essential for prevention.