Liceaceae

Liceaceae is a family of myxomycetes, commonly known as slime molds. These fascinating, fungus-like organisms exist as mobile plasmodia during their vegetative stage, moving across surfaces to feed on decaying organic matter, bacteria, and fungal spores.

While they are not primary pathogens that invade living plant tissues, they are frequently found on the bark of trees, fallen logs, and moist soil surfaces in greenhouses. Their presence is often a biological indicator of excessive moisture and poor sanitation practices within an agricultural or garden setting.

Symptoms of their presence include the development of small, distinctive sporangia or fruiting bodies that may appear as tiny, colorful cushions or powdery patches on plant stems, debris, or moist soil. Unlike true fungal pathogens, they do not cause necrosis or tissue rot but may aesthetically detract from plant health.

Conditions favoring their development include high humidity, stagnant air, poor drainage, and the accumulation of decaying plant material. These organisms thrive in environments where environmental stressors have already compromised the surface of the plant or the surrounding substrate.

Management and prevention focus primarily on improving environmental conditions. Key steps include:

• Maintaining proper spacing between plants to ensure good airflow.
• Removing decaying organic debris from the base of plants.
• Implementing efficient irrigation schedules to prevent soil waterlogging.
• Ensuring proper ventilation in greenhouses to reduce surface moisture.