Cylindrocarpon root rot

Cylindrocarpon carneum is a fungal pathogen primarily known for causing root and crown rot in a wide variety of plants. It is a soil-inhabiting fungus that persists in the environment through resistant spores, allowing it to survive for extended periods in crop debris or the soil matrix itself.

This pathogen impacts a broad spectrum of hosts, including forest seedlings, orchard fruit trees, and various ornamental species. It is particularly problematic in nurseries and intensive farming systems where plants are exposed to high moisture and restricted air circulation in the root zone.

Initial symptoms include the discoloration of roots, often turning brown or black, followed by the decay of cortical tissues. As the root system loses its functionality, the plant displays symptoms of nutrient deficiency and water stress, such as stunted growth, yellowing foliage, and progressive wilting, which often leads to the death of the entire plant.

Environmental conditions play a crucial role in disease development. Cylindrocarpon carneum thrives in damp, cool, or temperate soil conditions, especially when soil aeration is poor. The fungus enters the host primarily through natural openings or wounds created by soil pests, mechanical injury, or transplanting shock.

Management and prevention focus on creating an environment unfavorable for fungal growth:

• optimizing soil drainage to prevent waterlogging;
• implementing strict sanitation protocols for planting containers and tools;
• selecting well-draining planting sites;
• applying biological or chemical fungicides as a preventative measure in high-risk zones.