Melogrammataceae

Melogrammataceae is a family of fungi belonging to the class Ascomycota. In the context of agricultural and forest pathology, these fungi are identified as pathogens capable of affecting the bark and woody tissues of various tree species. They are often classified as opportunistic pathogens that thrive when a host plant is under environmental stress.

The disease mechanism involves the development of stroma—a dense mass of mycelium that houses the fungal reproductive structures. These structures erupt through the host's bark, leading to significant structural damage. The lifecycle of these pathogens is closely tied to moisture levels and the availability of necrotic or weakened plant tissues.

These pathogens predominantly affect deciduous trees. Host range varies but often includes broad-leaved species in temperate zones. Infection frequently occurs through wounds caused by pruning, animal damage, or adverse weather conditions like frost cracks, which expose the inner tissues to fungal colonization.

• Dark, pimple-like stromatic outgrowths on the bark surface.
• Localized necrosis and splitting of the bark.
• Dieback of twigs and smaller branches.
• Reduced vigor of the canopy in severe cases.
• Premature yellowing or shedding of leaves near the infected site.

Management of Melogrammataceae requires a proactive approach centered on plant health and sanitation. It is essential to remove all infected wood during dormant seasons to reduce the inoculum load. Maintaining tree vigor through proper irrigation and nutrient management is the most effective preventative measure against these secondary fungal infections.