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The Guide to Caring for Your Plants

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Learn to recognize pests and how to combat them

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Pest Guide

Symptoms, treatments, and recommendations for treating white rot

White Rot

Sclerotinia Sp.

Pathogen:

Fungus

Type:

Risk:

HIGH

Moho blanco

Plantas decorativas de jardín y/o interior

White rot: Symptoms and damage in decorative garden and/or indoor plants

WHO CAUSES IT?

Sclerotinia sp. It is a pathogenic fungus that affects a wide variety of plants. This fungus develops in the soil and produces sclerotia, resistance structures that can survive in the soil for several years under adverse conditions. Sclerotia germinate in the presence of favorable environmental conditions, such as high humidity and moderate temperatures, producing apothecia, which are small cup-shaped structures. The apothecia release spores called ascospores, which are dispersed by wind and water, infecting the plant tissues of the host plants. The infection generally begins in the lower parts of the plant, where the spores encounter high humidity conditions, and spreads rapidly causing decomposition of the affected tissues.

SYMPTOMS

White rot caused by Sclerotinia sp. significantly affects plants, causing symptoms that can lead to a considerable loss of vigor and production.

- Appearance of watery Taches on stems and leaves.
- Decomposition of the affected tissues.
- Formation of a white cottony mass in diseased tissues.
- Withering and collapse of the aerial parts of the plant.
- Presence of black sclerotia inside the stems and roots.
- Delay in the growth and development of the plant.
- Premature fall of flowers and fruits.
- Death of young plants and weakening of adult plants.

White rot on decorative garden and/or indoor plants: How to recognize and treat it effectively

TEMPERATURE AND HUMIDITY

15°C a 25°C

70% a 90%

TRANSMISSION ROUTES

Spores carried by wind, Contact with infected soil, Contaminated tools, Irrigation with infected water, Infected plant material, Movement of sclerotia in soil

Do you want to remove this pest? Choose how you want to treat it.

TREATMENTS

Chemical treatments

• AZOXISTROBIN 25% [SC] P/V
• CIPRODINIL 37.5% + FLUDIOXONIL 25% [WG] P/P
• PHENHEXAMIDE 50% [SC] P/V
• PIRACLOSTROBIN 6.7% + BOSCALIDE 26.7% ( ) [WG] P/P
• PIRACLOSTROBIN 6.7% + BOSCALIDE 26.7% (I) [WG] P/P

Authorized treatments in organic farming

Biological control

• BACILLUS AMYLOLIQUEFACIENS subsp. plantarum (strain D747) 5% [SC] P/V
• BACILLUS SUBTILIS (STRAIN QST 713) 1.34% [SC] P/V
• PYTHIUM OLIGANDRUM (strain M1) 17.5% [WP] P/P
• TRICHODERMA ASPERELLUM (STRAIN ICC012) 2% + TRICHODERMA GAMSII (STRAIN ICC080) 2% (3 X 10E7 CFU/G (SUM OF BOTH MICROORGANISMS)) [WP] P/P
• TRICHODERMA ASPERELLUM (STRAIN T25) (1X10E8 CFU/G) 0.5% + TRICHODERMA ATROVIRIDE (STRAIN T11) (1X10E8 CFU/G) 0.5% [WG] P/P
• TRICHODERMA ASPERELLUM (STRAIN T34) 12% (1.0 x 10E12 cfu/kg) [WP] P/P
• TRICHODERMA ATROVIRIDE (STRAIN I-1237) (1x10E8 cfu/g) 5% [WP] P/P

Recommendations

- Carry out crop rotations with non-susceptible species to reduce the accumulation of sclerotia in the soil.
- Use specific fungicides in seed treatment and during the crop cycle.
- Implement agricultural management practices that reduce moisture in the soil and foliage, such as drip irrigation.
- Remove and destroy the remains of infected crops to prevent the spread of sclerotia.
- Use resistant cultivars when available.
- Maintain an adequate planting density to improve air circulation and reduce humidity.
- Apply organic amendments to the soil that promote the activity of antagonistic microorganisms.
- Constantly monitor crops for early detection of symptoms and apply control measures in a timely manner.
- Avoid excess nitrogen fertilization that favors the development of tender and susceptible tissues.