Fusarium concentricum

Pathogen and disease type. The pathogen Fusarium concentricum is a fungus belonging to the Ascomycota division. It is known primarily as a specialized plant pathogen capable of causing severe rot and wilting. The disease is characterized by the systemic infection of the host tissue, leading to structural breakdown and loss of metabolic function in the affected plant organs.

Affected crops. This fungus is predominantly associated with fruit crops, particularly citrus fruits. It acts as a significant post-harvest pathogen, though it can also affect various tropical and subtropical plants in field conditions. Its impact is most frequently observed during storage, where it compromises the economic value of the produce.

Symptoms and signs. The hallmark symptom of the infection is the development of circular, concentric patterns on the surface of the fruit. As the infection progresses, these areas become necrotic and soft. The surface often develops a white or pale pink mold growth, which represents the sporulation of the fungus. Interior tissues usually suffer from rapid decay, turning into a mushy, water-soaked mass.

Conditions for development. Fusarium concentricum thrives in environments with high relative humidity and moderate to warm temperatures. It spreads efficiently through airborne spores or via water splashing. Poor ventilation in storage facilities and the presence of micro-injuries on the fruit surface significantly increase the rate of infection and the speed of disease transmission between neighboring fruits.

• Rigorous sanitation of storage facilities and transportation containers.
• Careful handling of fruits to prevent mechanical bruising and skin damage.
• Maintaining dry, cool storage conditions to inhibit fungal growth.
• Sorting and removing symptomatic fruits immediately upon discovery.
• Application of approved post-harvest fungicidal treatments when necessary.

Harmfulness and protection measures. The economic damage caused by Fusarium concentricum relates primarily to the rapid spoilage of harvested goods, leading to significant financial losses for growers and retailers. Effective protection relies on maintaining high standards of hygiene throughout the post-harvest chain and utilizing appropriate biological or chemical control agents to prevent the initial colonization of the fruit.