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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 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 SMART 4215

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Betaseed

DE
2 records

Betako

Active

Beta vulgaris Garden Beet Group · Garden beet

PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.

PL
2 records

Borus

Active

Beta vulgaris Garden Beet Group · Garden beet

PLANTICO HODOWLA I NASIENNICTWO OGRODNICZE ZIELONKI SP. Z O.O.

PL
2 records

Banda

Active

Beta vulgaris Sugar Beet Group · Sugar beet

SESVanderhave NV

NL
2 records

Bogdana

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

NOVARTIS SEEDS

FR
2 records

Batory

Active

Beta vulgaris Sugar Beet Group · Sugar beet

WIELKOPOLSKA HODOWLA BURAKA CUKROWEGO SP.Z.O.O

PL
5 records

Attut

Active

Beta vulgaris Sugar Beet Group · Sugar beet

DLF Beet Seed APS

PL
2 records

Armoise

Active

Beta vulgaris Sugar Beet Group · Sugar beet

SESVANDERHAVE NV-SA, BE

FR
2 records

Alexandra

Protection expired

Beta vulgaris Sugar Beet Group · Sugar beet

Breeding Division of Hellenic Sugar Industry

GR
2 records

Angelina

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

KWS Kleinwanzlebener Saatzucht AG (DE)

FR
2 records

Piilag B2

Active

Lagerstroemia L. · Crape Myrtle

Kardos Joshua H.

2 records

Centennial Gold

Active

Rhododendron L. · Azalea

BOOMTEELTPRAKTIJKONDERZOEK

2 records

Baillagone

Active

Lagerstroemia L. · Crape Myrtle

Michael A. Dirr^^^Rhonda Helvick^^^Joshua H. Kardos^^^Oren McBee

2 records

Bik C3

Protection expired

Beta vulgaris Garden Beet Group · Garden beet

Bejo Zaden B.V.

2 records

BTS 4770

Active

Beta vulgaris Sugar Beet Group · Sugar beet

DE UA
3 records

Xanadu

Active

Beta vulgaris Sugar Beet Group · Sugar beet

CZ DK
3 records

Brian

Protection expired

Beta vulgaris Sugar Beet Group · Sugar beet

CZ HU
3 records

Calgary

Protection expired

Daucus carota L. · Carrot

NL SK
3 records

Drusilla KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

DK SE
3 records

BTS 3645 RHC

Active

Beta vulgaris Sugar Beet Group · Sugar beet

DE
3 records

Pacemaker III

Active

Beta vulgaris Garden Beet Group · Garden beet

NL
3 records

Novatessa KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

DE
3 records

Namdal

Active

Daucus carota L. · Carrot

NL
3 records

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