Pudrición de raíz y tallo
Root Rot
Pythium Sp.
Pathogen:
Oomycete
Type:
Risk to the plant:
CRITICAL
DESCRIPTION
WHO CAUSES IT?
Pythium sp. is a genus of oomycetes that affects a variety of crops, including grass, causing diseases such as root rot. The pathogen can survive in soil and water, waiting for favorable conditions to germinate and form propagation structures, such as zoospores and sporangia. Zoospores are mobile and can swim to the roots of the grass, where they infect and cause damage. Warm, humid conditions are optimal for the propagation and development of Pythium sp..
SYMPTOMS
Root rot in turf caused by Pythium sp. It manifests itself with the weakening of the grass due to damage to the roots. Roots may turn black and soft, and the grass may wither and die, leaving areas of dead grass.
• Weakening of the grass due to root rot.
• Black, soft roots that can decompose.
• Wilting and death of grass, leaving areas of dead grass.
• Reduction in the quality and density of the grass.
TEMPERATURE AND HUMIDITY
15°C - 30°C
75% - 100%
HOW IS IT SPREAD?
Contaminated soil, water, tools and equipment, contact with infected grass.
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
• FOSETIL-AL 80% [WG] P/P
Treatments allowed 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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• Maintain good irrigation management to avoid excess moisture in the grass.
• Improve soil drainage to prevent waterlogging.
• Practice turfgrass or crop rotation to reduce pathogen pressure in the soil.
• Use specific fungicides following local recommendations.
• Disinfect gardening tools and equipment to prevent spread.
• Remove and destroy infected areas of grass and plant debris.
Recommendations
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