Fusariosis
Rot Or Fusariosis
Fusarium Solani
Pathogen:
Fungus
Type:
Risk to the plant:
HIGH
DESCRIPTION
WHO CAUSES IT?
Fusarium solani is a phytopathogenic fungus that causes important diseases in a variety of plants, including carrots. This fungus is found in soil and can survive for long periods in the absence of a host by forming resistant spores called chlamydospores. Fusarium solani is introduced into the plant through wounds in the roots or by direct contact with the mycelium. Once inside, the fungus colonizes the plant's vascular system, clogging the vessels and causing symptoms of wilting and rot. The fungus produces conidia, which are dispersed by wind and water, facilitating spread to new plants. In addition, it can persist in the remains of infected plants and in the soil, which complicates its eradication. The ability of Fusarium solani to infect through multiple routes and its persistence in the environment make it a difficult pathogen to control in agricultural crops.
SYMPTOMS
The disease caused by Fusarium solani in carrots manifests itself mainly as rot or fusariosis, affecting both the roots and the aerial part of the plant. Symptoms include discoloration and decay of affected tissues, which can lead to plant death if the infection is severe. In carrots, the infection typically begins at the roots, spreading upward and causing rot.
- Brown to black discoloration at the roots.
- Root rot with an unpleasant odor.
- Wilting of the aerial part of the plant.
- Reduction of plant vigor and growth.
- Tissue necrosis in the affected areas.
- Premature death of severely affected plants.
TEMPERATURE AND HUMIDITY
20°C - 30°C
70% - 90%
HOW IS IT SPREAD?
Irrigation water, Wind, Contaminated tools, Infested soil, Infected plant remains, Infected seeds
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
• AZOXISTROBIN 25% [SC] P/V
• CIPRODINIL 37.5% + FLUDIOXONIL 25% [WG] P/P
• PIRACLOSTROBIN 6.7% + BOSCALIDE 26.7% (I) [WG] P/P
Authorized treatments in organic farming
-
Insect allies
PREDATORY MITES
LADYBUGS
LACEWINGS
PARASITIC WASPS
HOVERFLIES OR PARASITIC FLIES
PREDATORY BUGS
There are no natural allies
Mycodiplosis oidii (predatory mosquito)
EFFECTIVE PRODUCTS TO ELIMINATE THIS DISEASE
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- Use certified pathogen-free seeds.
- Implement crop rotation with non-susceptible plants to reduce the accumulation of the fungus in the soil.
- Improve soil drainage to avoid excess moisture, which favors the spread of the fungus.
- Remove and destroy remains of infected plants after harvest to reduce inoculum in the field.
- Apply preventive and curative fungicides according to technical and integrated pest management recommendations.
- Avoid excessive use of nitrogen fertilizers, as they can increase the susceptibility of plants to infection.
- Regularly monitor crops to detect early symptoms and take control measures quickly.
- Practice soil solarization to reduce the pathogen load in the soil before planting.
Recommendations
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