Crepidotus lundellii

Crepidotus lundellii is a species of saprotrophic fungus primarily known for its role in decomposing decaying wood. As a member of the Crepidotaceae family, it functions as a decomposer in forest ecosystems, although its appearance on garden trees usually signals that the plant is already stressed, damaged, or undergoing necrotic processes.

This fungus typically colonizes the wood of deciduous trees. While it is not usually a parasite of healthy, vigorous plants, it can establish itself on limbs and trunks that have been compromised by injuries, pest attacks, or extreme weather conditions, further accelerating the decay of the wood.

The primary symptom of infestation is the emergence of small, fan-shaped, sessile fruiting bodies on the surface of the bark. These mushrooms are typically white or cream-colored when young, later developing yellowish or brownish tones. Internally, the fungus degrades the woody structure, leading to white rot which weakens the structural integrity of the affected tree part.

Environmental conditions that favor the development of Crepidotus lundellii include high humidity, poor air circulation, and persistent moisture on tree surfaces. Spore dispersal is facilitated by wind and water splash, allowing the fungus to settle in wounds or cracks where the protective layer of the bark is broken.

To prevent the spread and negative impact of this fungus on your plants, the following management practices are recommended:

• Conduct regular sanitary pruning to remove dead or dying branches.
• Apply specialized wound dressings to fresh cuts or breakage sites.
• Maintain adequate spacing between trees to improve airflow and reduce humidity.
• Remove any decaying organic matter or logs from the immediate vicinity of healthy trees.