Aspergillus melleus

Aspergillus melleus is a species of mold fungus within the Aspergillus genus, recognized as a significant phytopathogen. This fungus acts as a primary agent in the deterioration of stored agricultural products, including cereal grains, oilseeds, and various perishable commodities, leading to severe economic losses.

The host range is extensive, primarily targeting grains and legume seeds during post-harvest storage. Once the fungus establishes itself, it colonizes the embryo and endosperm of the seed, effectively depleting nutritional reserves and inhibiting the future germination potential of the grain.

Symptoms of infection are visually identified by the presence of a distinct yellowish or ochre-colored mycelial mat covering the surface of the infected material. Affected seeds often darken in color, become brittle, and emit a characteristic musty or moldy odor resulting from the metabolic byproducts of the fungus.

The development of this pathogen is highly dependent on environmental factors, specifically high relative humidity and elevated temperatures, typically exceeding 25 degrees Celsius. In storage facilities, poor ventilation and localized hotspots created by respiration provide the ideal microclimate for the rapid proliferation of Aspergillus spores.

• Maintain grain moisture levels below 14% to inhibit fungal growth.
• Implement strict sanitation protocols in storage silos.
• Use certified seed dressings to prevent early-stage infection.
• Ensure adequate aeration to prevent moisture condensation.

Beyond the physical degradation of the produce, the most severe concern is the potential production of mycotoxins, which can compromise the safety of animal feed and human food supplies. Preventive measures such as rapid drying, regular monitoring of storage temperature, and maintaining proper structural hygiene are essential for effective management.