Bacteriosis
Potato brown rot or bacterial wilt: what it is, how it occurs, and how to effectively eliminate it.
Potato Brown Rot Or Bacterial Wilt
Ralstonia Solanacearum
Pathogen:
Bacterium
Type:
Risk to the plant:
CRITICAL
DESCRIPTION
WHO CAUSES IT?
Ralstonia solanacearum is a phytopathogenic bacteria that causes the disease known as potato brown rot or bacterial wilt. The bacteria grow in soil and can survive in adverse conditions for long periods. Ralstonia solanacearum can infect potato plants through roots, wounds or lesions on the plant. Once inside, the bacteria moves through the vascular system, blocking the conductive vessels and causing the plants to wilt.
SYMPTOMS
The disease caused by Ralstonia solanacearum produces a variety of symptoms in potatoes. Symptoms include wilting and yellowing of the leaves, starting with the lower ones, and brown rot of the tubers. Infection in the tubers can cause tissue decomposition and a dark color in the pulp, reducing the quality and quantity of the harvest.
• Wilting and yellowing of leaves, especially on young shoots.
• Brown rot of tubers.
• Decomposition of tissues and dark color in the pulp.
• Reduction in the quality and quantity of the harvest.
TEMPERATURE AND HUMIDITY
24°C - 35°C
75% - 100%
HOW IS IT SPREAD?
Contaminated soil, contaminated irrigation water, contaminated growing tools, direct contact with infected plants or tubers.
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
• CUPRIC HYDROXIDE 13.6% (EXPR. IN CU) + COPPER OXYCHLORIDE 13.6% (EXPR. IN CU) [SC] P/V
• CUPRIC HYDROXIDE 20% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 25% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE (Exp. in Cu) 52% [SC] P/V
• COPPER OXYCHLORIDE 25% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 30% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 37.5% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 38% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 50% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 52% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 70% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 70% [SC] P/V
• CUPROCALCIC SULFATE 12.4% (EXPR. IN CU) [SC] P/V
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
• CUPROCALCIC SULFATE 20% [WP] P/P
• TRIBASIC COPPER SULFATE 19% (EXPR. IN CU) [SC] P/V
• TRIBASIC COPPER SULFATE 40% (EXPR. IN CU) [WG] P/P
Authorized treatments in organic farming
• CUPRIC HYDROXIDE 13.6% (EXPR. IN CU) + COPPER OXYCHLORIDE 13.6% (EXPR. IN CU) [SC] P/V
• CUPRIC HYDROXIDE 20% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 25% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE (Exp. in Cu) 52% [SC] P/V
• COPPER OXYCHLORIDE 25% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 30% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 37.5% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 38% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 50% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 52% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 70% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 70% [SC] P/V
• CUPROCALCIC SULFATE 12.4% (EXPR. IN CU) [SC] P/V
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
• CUPROCALCIC SULFATE 20% [WP] P/P
• TRIBASIC COPPER SULFATE 19% (EXPR. IN CU) [SC] P/V
• TRIBASIC COPPER SULFATE 40% (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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• Use potato varieties resistant to Ralstonia solanacearum.
• Practice crop rotation with non-host plants to reduce the presence of the bacteria in the soil.
• Maintain good hygiene in cultivation and storage tools.
• Apply specific bactericidal treatments according to expert recommendations.
• Avoid excessive watering, especially in poorly drained soils.
• Remove and destroy infected plants to reduce spread.
Recommendations
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