Plicaria leiocarpa

Plicaria leiocarpa is a species of fungi within the Pezizaceae family. In agronomy, it is recognized as a soil-inhabiting pathogen that can act as a facultative parasite, primarily affecting the root systems and crowns of seedlings in nurseries and greenhouse environments.

The fungus typically affects nursery stocks, ornamental seedlings, and certain vegetable crops. It is particularly dangerous in high-density cultivation areas where conditions for pathogen proliferation are met, leading to significant economic losses during the propagation stage of plant production.

The most common symptoms include damping-off, where the stems of seedlings become soft and dark at the soil line, eventually causing the plant to collapse. The presence of small, saucer-shaped, brown apothecia (fruit bodies) on the soil surface is a diagnostic sign of the fungal activity in the growing medium.

Environmental conditions such as excessive soil moisture, poor drainage, and high organic matter content are the primary drivers of Plicaria leiocarpa development. The pathogen spreads via airborne spores and water splashing, making it highly contagious within confined cultivation spaces.

Effective management strategies rely on rigorous sanitation and environmental control. Key preventative actions include:

• Steam or chemical sterilization of growing media.
• Ensuring proper soil drainage and ventilation.
• Strict hygiene protocols for tools and containers.
• Immediate removal and destruction of infected plant material.