Xylaria Mali is a specific species of fungi that belongs to the Xylariaceae family. It is also known as the apple tree root rot fungus because it is a major cause of root rot in apple trees, resulting in significant economic loss in the horticultural industry. Xylaria Mali can be identified by its black, club-shaped fruiting bodies which appear on the bark and roots of infected trees. Synonyms for this fungus include Xylaria carpophila, Xylaria dendrobatidis, and Xylaria igniaria. Although Xylaria Mali has a negative impact on the apple industry, it serves an important ecological role in decomposing wood and enriching soil nutrients.