Diseases

Cercospora leaf spot

Cercospora beticola

Cercospora leaf spot is a fungal plant disease that causes leaf spotting, necrosis, and a significant yield reduction due to the disruption of photosynthesis.

Mentioned in descriptions 2 072 varieties reference book.

The disease manifests as small circular spots measuring 2–5 mm, light brown or grayish in color with a characteristic purple or reddish-brown border. Under high humidity, a velvety coating, representing the fungus's sporulation, forms in the center of the affected areas. Subsequently, the spots coalesce, causing yellowing, necrosis, and premature death of the leaf blade, which forces the plant to expend stored nutrients on foliage regeneration.

The development of the pathogen depends on weather conditions, requiring temperatures in the range of +20 °C to +30 °C and a high relative humidity above 70–90%. The presence of free moisture on the leaf surface is critical for the fungus to penetrate through the stomata. The infection persists in the soil on plant debris as mycelium and can be transmitted via seed material.

Evaluation of the resistance of varieties and hybrids is conducted during variety trials based on a visual method, where the degree of infestation is recorded as a percentage of the leaf area or on multi-point scales. Experts use phytomonitoring and regular surveys to determine the infection spread dynamics. Based on the observation results, samples are ranked by resistance groups, which helps agronomists select hybrids capable of maintaining a healthy leaf apparatus until the end of the vegetation period.

Sources10

Breakdown by crop

Cercospora Leaf Spot — Sugar Beet 484 Cercospora Leaf Blight of Carrot 64 Cercospora Leaf Spot of Table Beet 52 Cercospora Leaf Spot — Fodder Beet 24 Cercospora Leaf Spot of Beet 16 Cercospora Leaf Spot of Swiss Chard 6 Cercospora leaf spot of soybean 5 Cercospora leaf spot of crapemyrtle 5 Rice Cercospora Leaf Spot 3

Found in these crops

Sugar beet 499 Carrot 68 Garden beet 52 Mangelwurzel 24 Beet 16 Swiss chard 7 Crape Myrtle 6 Soybean 4 Rice 3 Maize 3 Tall fescue 2 Bigleaf hydrangea 2

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.

Canada F1

Active

Daucus carota L. · Carrot

Her Bimsdeboer

1 record

CARINA

Withdrawn

Daucus carota L. · Carrot

Seminis Vegetable Seeds

1 record

Boro F1

Active

Beta vulgaris Garden Beet Group · Garden beet

Her Bemsdeburh

2 records

Bikores

Active

Beta vulgaris L. subsp. vulgaris · beet

Semenarna Ljubljana, SI

1 record

Barskyi

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

Honcharuk Hryhorii Semenovych, Rybak Volodymyr Oleksiiovych, Kulik Oleksandr Heorhiiovych, Roik Mykola Volodymyrovych,

2 records

Belgrado F1

Active

Daucus carota L. · Carrot

Ger Bimsdeboer

1 record

Batory

Withdrawn

Beta vulgaris Garden Beet Group · Garden beet

Wielkopolska Hodowla Roślin Ogrodniczych

2 records

Baccara/Bakara

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

Khart Rodzher Evelin

1 record

B2309

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Betaseed

1 record

B9207

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Betaseed

1 record

Aubepine

Application submitted

Beta vulgaris Sugar Beet Group · Sugar beet

SESVANDERHAVE NV-SA, BE

1 record

Baku

Active

Beta vulgaris Sugar Beet Group · Sugar beet

DLF Beet Seed APS

1 record

BACCARA (H46123)

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

VANDERHAVE SUGAR BEET B.V

1 record

Arteon

Active

Beta vulgaris Sugar Beet Group · Sugar beet

SESVanderhave NV

4 records

Abstrakcja

Application submitted

Beta vulgaris Sugar Beet Group · Sugar beet

SAS Florimond Desprez Veuve & Fils

1 record

6K671

Withdrawn

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

1 record

9K918

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

1 record

7K89

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

1 record

5K29

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

1 record

Canterbury F1

Terminated

Daucus carota L. · Carrot

Ger Bimsdeboer

1 record

CRIMSON GLOBE

Protection expired

Beta vulgaris Garden Beet Group · Garden beet

2 records

Nerac I

Withdrawn

Daucus carota L. · Carrot

1 record

Wodan F1

Protection expired

Beta vulgaris Garden Beet Group · Garden beet

Bejo Zaden (NL)

1 record

Smart Naelia

Active

Beta vulgaris Sugar Beet Group · Sugar beet

1 record

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Diseases

Powdery mildew 33 570
Fusarium wilt and blight 29 887
Viral mosaic diseases 22 022
Downy mildew 16 384
Leaf spot diseases 15 926
Rust 14 859
Verticillium wilt 12 175
Scab 12 064

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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.