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Sclerotinia rot
Sclerotinia sclerotiorum (Lib.) de Bary


Taxonomic Rank: Leotiomycetes > Helotiales > Sclerotiniaceae > Sclerotinia
Common Name Synonym(s): White mold of dry beans, Sclerotinia stem rot, timber rot, white mold
Category: Diseases: Fruit and Seed Diseases

133 Records
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Image Descriptor Description
1436133 Symptoms
2176060 Fruiting Bodies
2176061 Sign
2176063 Sign
2176064 Sign

sclerotia cross-section

2176065 Sign

cross-section of sclerotium

2176066 Sign

cross-section of sclerotium

2176067 Sign

sclerotium

2176098 Sign

cross-section of sclerotia

5027028 Symptoms
5027029 Symptoms
5027030 Symptoms
5076078 Symptoms White, fluffy mycelia grow on surface and form black sclerotia. Tissue turns tannish or gray and is highly deteriorated. Looks like cottony leak (Pythium) but occurs during cool weather.
5077018 Symptoms Entire head begins to collapse with white fungal growth observed. Black, raisin-like structures observed in latter stages of development.powerpo
5077035 Sign Grayish, white mold observed usually at base of plant. Black "raisin" like structures observed in latter stages of development. Plant will collapse in latter stages.
5077070 Symptoms Grayish, white mold forms at the base of stem. Black "raisin" like structures appear as disease progresses. Can extend underground to the root.o
5258069 Symptoms
5258070 Symptoms
5258071 Symptoms
5258072 Symptoms
5258073 Sign
5258074 Symptoms
5258075 Symptoms
5258076 Symptoms
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5258080 Symptoms
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5258090 Sign
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5258092 Symptoms
5261080 Symptoms
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5331078 Symptoms

fungal sclerotia also pictured

5331082 Symptoms
5333063 Sign
5337007 Sign
5337057 Sign
5337058 Symptoms
5356789 Sign

Carrot covered in white mold (Sclerotinia sclerotiorum).

5357172 Damage

Bean plants destroyed by white mold (Sclerotinia sclerotiorum).

5357373 Symptoms

Sunflower plants showing symptoms of  white mold infection caused by Sclerotinia sclerotiorum in the field.

5357374 Symptoms

Sunflower plants showing symptoms of  white mold infection caused by Sclerotinia sclerotiorum in the field.

5357375 Sign

Sunflower plants with  white mold infection caused by Sclerotinia sclerotiorum in the field. The fungus mycellia are the white mass around the base of the stem.

5357376 Sign

A sunflower plant with  white mold infection caused by Sclerotinia sclerotiorum in the field. The fungus mycellia are the white mass around the base of the stem.

5357377 Symptoms

A sunflower stem with severe white mold infection caused by Sclerotinia sclerotiorum in the fiield.

5357523 Culture

A culture plate of the white mold fungus Sclerotinia sclerotiorum in the laboratory.

5357529 Sign

Some bean pods showing signs of the white mlod fungus Sclerotinia sclerotiorum in the field.

5357612 Research

Straw technique used to inoculate experimental plants with Sclerotinia rot (Sclerotinia sclerotiorum).

5357613 Research

Straw technique used to inoculate experimental plants with white mold (Sclerotinia sclerotiorum) in the greenhouse.

5359184 Sign

A carrot field with white mold infection caused by the fungus Sclerotinia sclerotiorum at Lucerne.

5359185 Sign

A carrot field with white mold infection caused by the fungus Sclerotinia sclerotiorum at Lucerne. Please note the white mold sclerotia (black bodies) beneath the carrot canopy.

5359766 Symptoms

White mold (Sclerotinia sclerotiorum) symptoms on some interspecifically crossed breeding lines of drybeans in the greenhouse.

5359767 Symptoms

White mold (Sclerotinia sclerotiorum) symptoms on some interspecifically crossed breeding lines of drybeans in the greenhouse.

5359768 Symptoms

White mold (Sclerotinia sclerotiorum) symptoms on some interspecifically crossed breeding lines of drybeans in the greenhouse.

5359769 Symptoms

White mold symptoms on an interspecifically crossed breeding lines of drybeans in the greenhouse.

5359973 Feature(s)

A dry squash fruit containing the sclerotia of the white mold fungu (Sclerotinia sclerotiorum).

5360524 Symptoms

Zucchini fruits infected with the white mold fungus Sclerotinia sclerotiorum in the field.

5360525 Symptoms

Zucchini fruits infected with the white mold fungus Sclerotinia sclerotiorum in the field.

5360526 Symptoms

Zucchini fruits infected with the white mold fungus Sclerotinia sclerotiorum in the field.

5360527 Symptoms

Zucchini fruits infected with the white mold fungus Sclerotinia sclerotiorum in the field.

5360528 Symptoms

Zucchini fruits infected with the white mold fungus Sclerotinia sclerotiorum in the field.

5360529 Symptoms

A zucchini fruit infected with the white mold fungus Sclerotinia sclerotiorum in the field.

5360530 Symptoms

A zucchini fruit infected with the white mold fungus Sclerotinia sclerotiorum in the field.

5360531 Symptoms

A zucchini fruit infected with the white mold fungus Sclerotinia sclerotiorum in the field.

5360532 Symptoms

A zucchini fruit infected with the white mold fungus Sclerotinia sclerotiorum in the field. Please note the fungal sclerotia on the fruit.

5360533 Symptoms

A zucchini fruit infected with the white mold fungus Sclerotinia sclerotiorum in the field. Please note the fungal sclerotia on the fruit.

5360534 Symptoms

A zucchini fruit infected with the white mold fungus Sclerotinia sclerotiorum in the field. Please note the fungal sclerotia on the fruit.

5360535 Research

Sclerotial inoculum of the white mold fungus Sclerotinia sclerotiorum  used for research on zucchini.

5360536 Symptoms

A dry zucchini fruit infected with the white mold fungus Sclerotinia sclerotiorum. Please note the black sclerotia of the fungus.

5360537 Symptoms

A dry zucchini fruit infected with the white mold fungus Sclerotinia sclerotiorum. Please note the black sclerotia of the fungus.

5360538 Research

White mold fungus (Sclerotinia sclerotiorum) inoculation on a zucchini squash field.

5360539 Research

White mold fungus (Sclerotinia sclerotiorum) inoculation on a zucchini squash field.

5360540 Research

White mold fungus (Sclerotinia sclerotiorum) inoculation on a zucchini squash field.

5360541 Research

White mold fungus (Sclerotinia sclerotiorum) inoculation on a zucchini squash field.

5360542 Research

White mold fungus (Sclerotinia sclerotiorum) inoculation on a zucchini squash field.

5360611 Fruiting Bodies

The apothecia of the white mold fungus Sclerotinia sclerotiorum on a drybeans field.

5360612 Sign

The colonization of a drybeans leaf by the white mold fungus Sclerotinia sclerotiorum in the field.

5360613 Sign

The colonization of a drybeans leaf by the white mold fungus Sclerotinia sclerotiorum in the field.

5361312 Symptoms

Drybean plants showing symptoms of white mold caused by Sclerotinia sclerotiorum.

5361385 Symptoms

White mold symptoms on bean plants caused by Sclerotinia sclerotiorum (Lib.) de Bary in the field.

5361386 Asexual Spore

The sclerotia of whitemold Sclerotinia sclerotiorum in the laboratory.

5361387 Sign

White mold (Sclerotinia sclerotiorum) apothecia.

5361388 Sign

White mold (Sclerotinia sclerotiorum) apothecia.

5361389 Sign

Bean pod and a bean blossom that have been colonized by white mold (Sclerotinia sclerotiorum).

5361390 Sign

White mold (Sclerotinia sclerotiorum) apothecia.

5361391 Sign

Fallen bean blossom colonized by white mold (Sclerotinia sclerotiorum), with apothecia of white mold in the soil nearby.

5361392 Symptoms

Advanced symptoms of white mold (Sclerotinia sclerotiorum) on the branches and pods of a bean plant.

5361393 Symptoms

Advanced symptoms of white mold (Sclerotinia sclerotiorum) on the branches and pods of bean plants.

5361394 Symptoms

Advanced symptoms of white mold (Sclerotinia sclerotiorum) on the branches and pods of a bean plant.

5361395 Symptoms

Advanced symptoms of white mold (Sclerotinia sclerotiorum) in the canopy of bean plants in the field.

5361396 Sign

Debris from screenings of culled beans, with sclerotia of white mold (Sclerotinia sclerotiorum) mixed among them.

5361397 Culture

White mold (Sclerotinia sclerotiorum) sclerotia on potato dextrose agar in the laboratory.  Isolated from common bean (Phaseolus vulgaris L.)

5361603 Symptoms

Symptoms of white mold (Sclerotinia sclerotiorum) on the stem and branches of a dry bean plant.

5361604 Symptoms

Symptoms of white mold (Sclerotinia sclerotiorum) on the stem and branches of a dry bean plant.

5361737 Research

Inoculation of squash with the white mold fungus Sclerotinia sclerotiorum in the field.

5361738 Research

Inoculation of squash with the white mold fungus Sclerotinia sclerotiorum in the field.

5361739 Research

Squash specimens inoculated with the white mold fungus Sclerotinia sclerotiorum on a field.

5363968 Sexual Spore

Photomicrograph of the ascus and ascospores of white mold (Sclerotinia sclerotiorum), a disease of dry beans.

5363972 Fruiting Bodies

Apothecia of white mold (Sclerotinia sclerotiorum) in a petri dish.

5363973 Sign

Apothecia of white mold (Sclerotinia sclerotiorum) and fallen blossoms of dry bean that have been colonized by white mold.

5363974 Sign

Apothecia of white mold (Sclerotinia sclerotiorum) and fallen leaves of dry bean that have been colonized by white mold.

5363975 Sign

Fallen blossoms of dry bean that have been colonized by white mold (Sclerotinia sclerotiorum).

5363976 Symptoms

Wilting of a dry bean plant in the field, an initial symptom of infection with white mold (Sclerotinia sclerotiorum).

5363977 Symptoms

Wilting of dry bean plants in the field, advanced symptoms of infection with white mold (Sclerotinia sclerotiorum).

5363978 Symptoms

Wilting and death of the bean canopy, an advanced symptom of infection with white mold (Sclerotinia sclerotiorum).

5363979 Sign

Mycelium and sclerotia of white mold (Sclerotinia sclerotiorum) on the branch of a dry bean plant.

5365657 Equipment

An ARDEC plot layout for a white mold (Sclerotinia sclerotiorum) experiment on drybeans.

5365658 Equipment

An ARDEC plot layout for a white mold (Sclerotinia sclerotiorum) experiment on drybeans.

5368541 Symptoms

Collar rot first appears as small, dark green, water-soaked lesions at the base of stems. Clusters of infected transplants will appear and will have a yellow, wilted, and unthrifty appearance.

5368542 Sign

Signs of the fungus are found normally at the base of plants or on debris in float trays and include a white, cottony mycelium (fungal mass), present if humidity is high, and irregularly shaped, black sclerotia. Sclerotia resemble seeds or rodent droppi

5368543 Symptoms

Plants can be rotted in half by complete rotting of a portion of the lower stem.

5368544 Symptoms

Lower stem of an infected plants which severely rotted.

5368630 Symptoms

Lower stem decay.

5368631 Symptoms

Close-up of margin between decayed and healthy stem.

5368632 Symptoms

Lower stem decay where faint target pattern is seen with the infected area.

5368633 Culture

Culture of Sclerotinia sclerotiorum on Potato Dextrose Agar (PDA). Isolated from pepper (Capsicum annuum).

5368634 Culture

Culture of Sclerotinia sclerotiorum showing black "sclerotia".

5368815 Symptoms

A dry, lower stem rot usually with disintegrated pith tissue.

5368816 Symptoms

A dry, lower stem rot usually with disintegrated pith tissue.

5368817 Culture

Note the hard, black survival structures called “sclerotia” in culture plates.  Isolated from sweet coneflower (Rudbeckia subtomentosa Pursh)

5368818 Culture

Note the hard, black survival structures called “sclerotia” in culture plates.

5393412 Symptoms

Sporangia produced at the backside of the leaf



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