Pyrenochaeta lycopersici

Pyrenochaeta lycopersici is a fungal pathogen that causes Corky root rot, a disease primarily affecting tomato plants. It is a member of the Ascomycota phylum, which includes a wide variety of fungal species, many of which are pathogenic to plants.

Taxonomy

Pyrenochaeta lycopersici belongs to the Ascomycota phylum, the largest phylum of the Fungi kingdom. It is part of the Pleosporales order, which includes many plant pathogens. The genus Pyrenochaeta is characterized by the production of pycnidia, a type of fruiting body in fungi.

Disease Cycle

The disease cycle of Pyrenochaeta lycopersici begins when the fungus infects the roots of a tomato plant. The fungus produces mycelium, which penetrates the root tissue and causes the characteristic symptoms of Corky root rot. The fungus can survive in the soil for several years as chlamydospores, a type of resistant spore.

Symptoms and Management

The primary symptom of Corky root rot is the development of corky lesions on the roots of the tomato plant. This can lead to stunted growth and reduced yield. Management strategies for Corky root rot include crop rotation, use of resistant varieties, and soil sterilization.

Economic Impact

Corky root rot can have a significant economic impact on tomato production, particularly in regions where the disease is prevalent. The disease can reduce yield and quality, leading to financial losses for growers.

See Also

• Tomato diseases
• Fungal plant pathogens and diseases
• Ascomycota