Cylindrocarpon root rot

Cylindrocarpon root rot is a serious fungal disease caused by the pathogen Cylindrocarpon effusum. As a soil-borne fungus, it predominantly infects the roots and the basal stem tissues, leading to compromised nutrient uptake and physiological decline in a wide variety of cultivated plants.

This pathogen impacts numerous horticultural and ornamental species. It is particularly destructive in nursery environments and greenhouses where plants are grown in intensive conditions. The broad host range includes various vegetable crops and woody ornamentals, making it a significant concern for both greenhouse managers and commercial farmers.

The clinical symptoms of the disease include browning and necrosis of the root system, often followed by a basal stem rot. Above-ground symptoms manifest as chlorosis, stunted growth, general wilting during the day, and eventually, the total collapse of the plant. The damage is often overlooked until the root rot has progressed significantly.

The development and spread of Cylindrocarpon effusum are favored by high soil moisture, poor drainage, and moderate temperatures. The fungus can persist in the soil and on infected plant debris for extended periods. It is commonly disseminated through contaminated soil, infected nursery stock, irrigation water, and the movement of equipment between fields.

• Practice strict sanitation of tools and containers.
• Use high-quality, pathogen-free planting materials.
• Ensure proper soil drainage and aeration.
• Implement crop rotation to break the disease cycle.
• Apply specific fungicides as recommended by agricultural experts.

Management of the disease centers on preventative strategies and minimizing favorable conditions for the fungus. Chemical control via fungicide application can be effective but must be combined with good cultural practices, such as optimizing irrigation and maintaining soil hygiene, to achieve long-term success in reducing disease incidence.