Diseases

White mold

Sclerotinia sclerotiorum

White mold is a dangerous fungal disease caused by a soil-borne pathogen that affects a wide range of crops and persists in the soil in the form of sclerotia. The disease leads to significant crop losses and reduced product quality.

Mentioned in descriptions 3 042 varieties reference book.

The disease manifests as seedling rot and the appearance of brown, water-soaked spots on stems and flower heads, which become covered with a dense, white, cotton-like mycelial growth. Black, dense structures known as sclerotia form inside and on the surface of tissues, serving as a source of infection.

Pathogen development depends on temperature ranges from +10°C to +25°C, as well as high soil and air humidity, which are necessary for the germination of sclerotia. The risk of infection increases with high planting density, poor crop rotation, and excessive nitrogen fertilization.

Resistance of varieties to white mold is a quantitative polygenic trait provided by cell wall density and the plant's ability to neutralize oxalic acid secreted by the fungus. Resistance assessment in variety trials is conducted by recording the spread and severity of plant infection under field conditions on natural or artificial inoculation plots.

Sources10

Breakdown by crop

Sclerotinia Wilt of Sunflower 549 Sclerotinia stem rot of rapeseed 170 White Mold of Soybean 86 Sclerotinia stem rot of rapeseed 79 White mold — red clover 33 White Mold of Bean 13 White Mold of Lettuce 8 White Mold — White Clover 7 White rot of radish 6 White Rot of Garlic 6 White rot of carrot 5 White Mold of Pepper 4 White Rot of Cabbage 4 White Mold — White Mustard 4 White mold of peanut 3

Found in these crops

Sunflower 445 Rapeseed 192 Soybean 110 Rapeseed 86 Red clover 42 Common bean 23 White clover 13 Lettuce 11 White mustard 6 Peanut 4 Carrot 3 Brown mustard 3

Varieties that feature this in their description

Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.

Kombia

Active

Brassica napus var. napus · Rapeseed

MAS Seeds,FR

FR UA

6 records

Meridies CL

Active

Helianthus annuus L. · Sunflower

SAATEN UNION ROMANIA S.R.L.

IT PT UA

4 records

Lossam

Protection expired

Trifolium pratense L. · Red clover

GIE-AM.FOURRAGERE

DE ES FR

6 records

Invigor 2050

Active

Brassica napus var. napus · Rapeseed

Dirk Decherf

PL UA

6 records

Active

Helianthus annuus L. · Sunflower

PIONEER HI-BRED INTERNATIONAL

IT SK

6 records

RGT Axell

Active

Helianthus annuus L. · Sunflower

RAGT Semences, FR

AT FR

4 records

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.