Fomitiporia punctata

Fomitiporia punctata is a basidiomycete fungus belonging to the Hymenochaetaceae family. It is a well-known plant pathogen responsible for heart rot and stem decay in various deciduous tree species, significantly affecting both forest ecosystems and fruit orchards like apple and pear trees.

The fungus acts as a parasite that invades the inner tissues of the tree, causing white rot. As the mycelium grows, it breaks down the structural components of the wood, specifically lignin and cellulose. This process weakens the trunk and branches, often leading to structural failure during severe weather conditions.

The biological life cycle of Fomitiporia punctata is characterized by the production of perennial, resupinate, crust-like fruiting bodies. Spores are dispersed by wind and rain, infecting the tree through wounds, pruning cuts, or frost cracks. Once established, the fungus can persist for many years, slowly consuming the internal heartwood.

Environmental conditions such as high humidity and moderate temperatures favor the spread and colonization of the pathogen. Trees that are stressed due to drought, poor maintenance, or lack of proper wound healing are particularly susceptible to infection, as these wounds serve as primary entry points for spores.

Management strategies focus on sanitation and preventative care. Key actions include proper pruning techniques to minimize large wounds, disinfecting cutting tools between trees, and applying protective sealants to all major cuts. Removing and destroying heavily infected timber prevents the accumulation of inoculum in the surrounding area.

• Sanitary pruning
• Disinfection of pruning tools
• Wound protection and sealing
• Removal of infected woody debris