Leucosporidium scottii

The causative agent of the disease is Leucosporidium scottii, a basidiomycetous yeast-like fungus belonging to the group of psychrophilic microorganisms. In the context of phytopathology, it is typically viewed as a secondary pathogen or contaminant capable of causing spoilage of plant products during storage and infecting weakened plant tissues.

This microorganism affects a wide range of agricultural crops, including fruits, berries, and vegetables during the post-harvest storage period. Leucosporidium scottii is also frequently detected on cereal crops and forage grasses, where it thrives under conditions of high humidity and low positive temperatures, typical of cold storage facilities or damp warehouses.

Symptoms of infection manifest as a surface coating, which may appear pinkish, creamy, or white in color. Affected plant tissues become soft, watery, and develop a characteristic yeast-like odor. Unlike many other phytopathogens, this fungus does not initially cause deep tissue necrosis but promotes rapid decay, preparing the substrate for the development of subsequent infections.

Favorable conditions for the development and spread of this species include low temperatures (due to its psychrophilic nature) and high relative humidity. Fungal spores are easily dispersed by air currents, water droplets, or contaminated equipment, making it highly hazardous in vegetable storage facilities with inadequate temperature control or poor ventilation.

• Maintaining strict temperature control during storage.
• Regular disinfection of storage facilities and containers.
• Timely removal of damaged fruits before entering storage.
• Humidity control to prevent condensation.

The economic impact of Leucosporidium scottii lies in direct losses of marketable produce and the degradation of raw material quality. Although the fungus rarely acts as a primary aggressor in open fields, its ability to multiply actively at low temperatures makes it a dangerous companion to other pathogens, significantly shortening the shelf life of produce in the industrial sector.