Denticularia mangiferae

The causal agent of this condition is the fungus Denticularia mangiferae. Classified as a fungal disease, it specifically targets mango trees, disrupting the plant's physiological processes and manifesting primarily as leaf spotting. This pathogen is a recognized constraint in mango production within tropical regions.

The primary host for Denticularia mangiferae is the mango tree (Mangifera indica). The fungus impacts various plant organs, including leaves, inflorescences, and young fruits. While the impact is most visible on the foliage, the infection of reproductive structures can lead to flower drop and reduced fruit set, significantly affecting overall tree yield.

Key symptoms include the appearance of small, irregular spots on the leaves, which often darken as the lesion matures. These spots can coalesce, leading to extensive necrotic tissue damage. Under conditions of high humidity, a fungal mycelium or spore layer may be visible on the undersides of the leaves, confirming the presence of the pathogen.

The development and spread of Denticularia mangiferae are heavily favored by warm, humid environments, especially during prolonged rainy seasons. Spores are primarily dispersed through rain splash, wind currents, and occasionally via contaminated pruning tools. Poor canopy management, which leads to high humidity within the tree structure, significantly exacerbates the spread.

Management and prevention focus on integrated pest management (IPM) strategies. Essential practices include:

• Regular pruning to improve air circulation and sunlight penetration.
• Sanitation, including the removal and destruction of heavily infected plant debris.
• Application of protective fungicides, such as copper-based formulations, particularly before the onset of the wet season.
• Maintaining tree vigor through proper fertilization to enhance natural resistance to the infection.