Chicken of the woods

Causative agent and type of disease: The Chicken of the woods (Laetiporus sulphureus) is a parasitic fungus belonging to the Polyporaceae family. It acts as a wood-decay pathogen, specifically causing brown heart rot, which compromises the structural integrity of the host plant.

Affected crops: This fungus primarily attacks deciduous trees. While often found in forest environments on oaks and willows, it also poses a significant threat to fruit trees, including apple, cherry, and pear trees, particularly in older or poorly maintained orchard conditions.

Symptoms and signs of infection: The most recognizable sign is the presence of bright yellow to orange shelf-like fungal fruit bodies growing on trunks or major branches. Internally, the wood undergoes a rapid transformation: it turns reddish-brown, becomes brittle, and eventually cracks into cubical chunks due to the destruction of cellulose.

Conditions for development and harmfulness: The fungus typically infects trees through wounds, pruned branches, or frost cracks. Its harmfulness lies in the progressive depletion of the tree's internal strength. As the heartwood decays, the tree becomes highly susceptible to windthrow and mechanical failure, significantly reducing the lifespan of the host.

Control and prevention measures: Effective management relies on proactive horticultural practices. Key strategies include:

• Regular inspection for fungal fruiting bodies.
• Sanitary pruning of infected wood, followed by immediate removal from the site.
• Sealing all pruning wounds and physical injuries with antifungal protective compounds.
• Maintaining optimal tree health through proper fertilization and pest control to minimize tree stress.