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How to recognize and combat phomosis in table beets
Phomosis
Fungus
Type:
Risk to the plant:
HIGH
Phoma Betae (Pleospora Betae)
Pathogen:
Micosis/Hongos
WHO CAUSES IT?
Phoma betae (Pleospora betae) is a phytopathogenic fungus that mainly affects beets. This fungus reproduces through asexual spores (conidia) and sexual spores (ascospores). Conidia form in structures called pycnidia, which are black, spherical fruiting bodies that appear in infected plant tissue. During wet conditions, conidia are released and dispersed by water and wind, infecting new plants. Ascospores are produced in structures called pseudothecia, which also form in dead plant tissue. These spores can survive on crop residues in the soil, facilitating reinfection in the following growing season. The fungus penetrates plants through wounds or natural openings, and once inside, it colonizes the internal tissue, producing toxins and enzymes that degrade plant cells.
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SYMPTOMS
Phomosis, caused by Phoma betae, is a disease that severely affects beets, compromising their quality and yield. The first symptoms are seen as small dark Taches on the leaves and crown of the plant. These Taches expand and become necrotic, causing sunken, discolored lesions. The infection extends to the roots, where black or brown Taches can be seen, which deepen and cause internal rot. Infected plants show delayed growth and wilting, especially in high humidity conditions.
- Small dark Taches on the leaves and crown
- Sunken and discolored lesions
- Black or brown Taches on the roots
- Internal root rot
- Delayed growth
- Wilting in high humidity conditions
DEVELOPMENT CONDITIONS
Temperature:
15°C - 25°C
Humidity:
70% - 90%
HOW IS IT SPREAD?
Conidia transported by water and wind, ascospores in crop residues, infected seeds, contaminated tools
HOW TO ELIMINATE IT?
Home treatments
There are no home treatments
Natural allies
Chemical treatments
There are no treatments for this disease. Treatments are directed at the insect vectors that transmit it. See insect treatments.
RECOMMENDED PRODUCTS TO ELIMINATE THE PEST
REPELLENT PLANTS
RECOMMENDATIONS
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