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.

BTS 2700 N

Active

Beta vulgaris Sugar Beet Group · Sugar beet

2 records

BTS 845

Active

Beta vulgaris Sugar Beet Group · Sugar beet

2 records

Barbarica KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

2 records

BTS 4780

Active

Beta vulgaris Sugar Beet Group · Sugar beet

2 records

Udina

Application submitted

Beta vulgaris Garden Beet Group · Garden beet

SAKATA SEED AMERICA INC US

1 record

Puncheur

Active

Beta vulgaris Sugar Beet Group · Sugar beet

SAS FLORIMOND-DESPREZ Veuve et Fils

1 record

Levona KWS

Withdrawn

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE, DE

1 record

Zluka

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

Borysova Tetiana Oleksandvivna, Borysova Larysa Serhiivna, Fedorenko Inha Anatoliivna, Mel`nychuk IUrii Viktorovych, Mel`nyk Nadiia Serhiivna, Malihon Halyna Serhiivna, Zmiievs`kyi Volodymyr Mykolaiovych, Chemerys Lina Mykolaivna, Panov Mykhailo Ivanovych

2 records

Voievoda

Terminated

Beta vulgaris Garden Beet Group · Garden beet

Muzhylko Viktor Valentynovych, Orlov Stanislav Dmytrovych,

1 record

Voievoda F1

Terminated

Beta vulgaris Garden Beet Group · Garden beet

Muzhylko Viktor Valentynovych, Orlov Stanislav Dmytrovych,

1 record

Victoria KWS

Protection expired

Beta vulgaris Sugar Beet Group · Sugar beet

KWS Saat AG, DE

1 record

Trafford F1

Application submitted

Daucus carota L. · Carrot

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

2 records

Terranova

Withdrawn

Beta vulgaris Sugar Beet Group · Sugar beet

MariboHilleshoeg Research AB

1 record

Sugar Dragon

Active

Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon

Semagri (CM)

1 record

Smart Telva

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

1 record

Rouge mammouth

Terminated

Beta vulgaris Fodder Beet Group · Mangelwurzel

Domaine Public (FR)

1 record

RODYNA

Active

Beta vulgaris Garden Beet Group · Garden beet

Sakata Vegetabels Europe, F

1 record

Rhonda F1

Active

Beta vulgaris Garden Beet Group · Garden beet

Ger Bimsdeboer

1 record

Red Bull

Active

Beta vulgaris Garden Beet Group · Garden beet

Mario Martinelli

2 records

Pluvier

Application submitted

Beta vulgaris Sugar Beet Group · Sugar beet

SESVANDERHAVE NV-SA, BE

1 record

Pepeta KWS

Withdrawn

Beta vulgaris Sugar Beet Group · Sugar beet

KWS Saat AG, DE

1 record

Okhtyrskyi

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

Borysov Dmytro Vasylovych, Leibovych Anatolii Solomonovych, Rybak Volodymyr Oleksiiovych, Kulik Oleksandr Heorhiiovych, Roik Mykola Volodymyrovych,

2 records

Ol`zhych

Terminated

Beta vulgaris L. · Beet

Stupak Iryna IUriivna, Rusavskyi Vladyslav Leonidovych, Parii Myroslav Fedorovych, Parii IUliia Oleksandrivna, Yeschenko Oleksii Volodymyrovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,

2 records

Noisette

Application submitted

Beta vulgaris Sugar Beet Group · Sugar beet

SESVANDERHAVE NV-SA, BE

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.