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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 Maize 3 Rice 3 Bigleaf hydrangea 2 Maize 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.

Smart Briga KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS Saat SE, Einbeck DE

CZ DE HR HU IT UA
8 records

Avia

Active

Beta vulgaris Sugar Beet Group · Sugar beet

STRUBE HERMANN| Dr. Hermann Strube

DE ES LT SE UA
7 records

Smart Djerba KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Monica Weber Dietrich Hauer Werner Beyer Maik Gertz

DE HR HU IT UA
8 records

Lisanna KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

BE DE DK ES NL SE
7 records

Lorenza

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

KWS| KWS SAAT AG

BE DE ES FR LT
7 records

Lunella KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

BE DE DK ES FR SE
8 records

Caprianna KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

BE DE DK FR NL SE
7 records

Boomerang

Protection expired

Beta vulgaris Sugar Beet Group · Sugar beet

VANDERHAVE SUGAR BEET SEED

BE FR GR HR HU NL
8 records

Bergen

Active

Daucus carota L. · Carrot

Bejo Zaden B.V.

CZ HU NL PL SI SK
7 records

Smart Attala KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE and CO KGAA

DE DK LT SE UA
8 records

Smart Perla KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS, D

HR HU IT PL UA
7 records

Parano

Terminated

Daucus carota L. · Carrot

Nunhems BV (NL)

CZ HR NL PL SK
8 records

Michelangelo

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Strube, D

HU IT PL UA
8 records

Smart Edytka KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE&Co.KGaA, D

DE HR HU PL
7 records

Leonarda

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE and CO KGAA

BE DK LT PL UA
7 records

Daphna

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE and CO KGAA

DE DK FR LT SE
7 records

Asketa

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Ursula Eggesieker-Weissenborn

DE HR HU NL UA
8 records

Wapiti

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Stefaan Horemans

HR HU LT UA
8 records

Vedeta

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Syngenta Seeds

BE CZ FR NL
8 records

Vanda

Active

Medicago sativa L. · Alfalfa

V.U.R.V.-Piest'any

AT CZ SK UA
10 records

Leopard

Active

Beta vulgaris Sugar Beet Group · Sugar beet

SESVANDERHAVE| SESVANDERHAVE N.V./S.A. Industriepark

DE FR PL UA
7 records

Angus

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Dr. Niels H. Gram

DK FR SE UA
7 records

Akela

Active

Beta vulgaris Garden Beet Group · Garden beet

RIJK ZWAAN ZAADTEELT EN ZAADHANDEL B.V.

NL PL SI UA
7 records

Negovia

Active

Daucus carota L. · Carrot

Bejo Zaden BV (NL)

HR NL SK
8 records

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