Phytophthora
Pink Rot
Phytophthora Erythroseptica
Pathogen:
Oomycete
Type:
Risk to the plant:
INTERMEDIATE
DESCRIPTION
WHO CAUSES IT?
Phytophthora erythroseptica is an oomycete, often called water mold, that causes the disease known as pink rot in potato crops. This pathogen develops in humid soil conditions and moderate temperatures. It produces sporangia that can be dispersed through water and soil, infecting the roots and tubers of the potato. Once infection has started, the pathogen can survive in stored tubers and spread during the following growing season.
SYMPTOMS
Pink rot produces symptoms mainly on potato tubers. Symptoms include pink Taches on the skin of the tubers, especially after being exposed to light or air. As the disease progresses, these Taches may turn brown and spread, causing the tubers to rot.
• Pink Taches on the skin of the tubers, which turn brown over time.
• Rotting of the tubers, causing tissue decomposition.
• Reduction in the quality and quantity of the harvest.
TEMPERATURE AND HUMIDITY
10°C - 25°C
70% - 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
• POTASSIUM PHOSPHONATES 25.5% (Exp. as phosphorous acid) + AZOXYSTROBIN 6.25% [SC] P/V
• POTASSIUM PHOSPHONATES 51% (Exp. as phosphorous acid) [SL] P/V
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WP] P/P
• METALAXIL 25% [WP] P/P
• 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 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
• CUPROCALCIC SULFATE 12.4% (EXPR. IN CU) [SC] P/V
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
Treatments allowed in organic farming
• POTASSIUM PHOSPHONATES 51% (Exp. as phosphorous acid) [SL] P/V
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WP] P/P
• 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 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
• 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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• Use potato varieties resistant to Phytophthora erythroseptica.
• Avoid excess moisture in the soil through controlled irrigation and good drainage.
• Practice crop rotation to reduce the presence of sporangia in the soil.
• Apply specific fungicide treatments according to expert recommendations.
• Maintain good hygiene in cultivation and storage tools.
• Regularly monitor stored crops and tubers for early signs of the disease.
Recommendations
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