Micosis/Hongos
Leprosy
Urophlyctis Leproides
Pathogen:
Fungus
Type:
Risk to the plant:
HIGH
DESCRIPTION
WHO CAUSES IT?
Urophlyctis leproides is a fungus that belongs to the chytrid group. This pathogen mainly affects table beets. Its cycle begins when the fungus's spores, called zoospores, swim in soil water in search of beet roots. Once they find a susceptible root, the zoospores attach to it and penetrate the root tissue. Inside the root, the fungus forms structures called sporangia, which release new zoospores as they mature. These zoospores can reinfect the same roots or spread to other nearby plants. Urophlyctis leproides can survive in the soil for several years in the absence of host plants, remaining dormant until conditions are favorable for infection.
SYMPTOMS
In table beets, Urophlyctis leproides causes the disease known as leprosy. This disease is characterized by the formation of nodules and galls on the roots and underground parts of the plant, which seriously affects the absorption of nutrients and water, and consequently, the development of the plant. The infection causes general weakness and a significant decrease in the quality and quantity of the crop.
- Formation of nodules and galls on the roots.
- Thickening and deformation of the roots.
- Delay in plant growth.
- Yellowing of the leaves.
- Reduction in crop yield.
- Development of Taches and lesions on the roots.
- Appearance of plants with stunted growth.
- Wilting in conditions of water stress.
TEMPERATURE AND HUMIDITY
15°C - 25°C
70% - 90%
HOW IS IT SPREAD?
Irrigation water, Contaminated soil, Agricultural tools, Infected plant material, Wind, Animals and humans
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
• ORANGE OIL 6% [SL] P/V
• AZOXISTROBIN 20% + DIFENOCONAZOLE 12.5% [SC] P/V
• AZOXISTROBIN 25% [SC] P/V
• SULFUR 70% [SC] P/V
• SULFUR 72% [SC] P/V
• SULFUR 80% [WG] P/P
• SULFUR 82.5% [SC] P/V
• DIFENOCONAZOLE 25% [EC] P/V
• COPPER OXYCHLORIDE 35% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 50% (EXPR. IN CU) [WP] P/P
• PIRACLOSTROBIN 6.7% + BOSCALIDE 26.7% ( ) [WG] P/P
• CUPROCALCIC SULFATE 12.4% (EXPR. IN CU) [SC] P/V
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
Authorized treatments in organic farming
• ORANGE OIL 6% [SL] P/V
• SULFUR 70% [SC] P/V
• SULFUR 72% [SC] P/V
• SULFUR 80% [WG] P/P
• SULFUR 82.5% [SC] P/V
• COPPER OXYCHLORIDE 35% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 50% (EXPR. IN CU) [WP] P/P
• CUPROCALCIC SULFATE 12.4% (EXPR. IN CU) [SC] P/V
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
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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- Implement crop rotations with non-host species to reduce the population of the fungus in the soil.
- Use beet varieties resistant to Urophlyctis leproides.
- Improve soil drainage to avoid excess moisture, which favors the spread of zoospores.
- Disinfect agricultural tools and equipment to prevent the spread of the fungus.
- Periodically monitor crops to detect early symptoms of the disease.
- Apply specific fungicides following technical and environmental recommendations.
- Maintain adequate management of infected crop residues, eliminating them safely.
- Avoid excessive irrigation and maintain adequate control of soil moisture.
Recommendations
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