Newcastle
ActiveDaucus carota L. · Carrot
BEJO ZADEN
NL
5 records
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.
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
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.
Fire Fresh
ActiveBeta vulgaris Leaf Beet Group · Swiss chard
SVE
NL
6 records
Eider
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
Florimond Desprez Veuve et Fils, FR
FR
4 records
Cordoba
ActiveDaucus carota L. · Carrot
BEJO ZADEN B.V, NL
NL
4 records
Cl111
ActiveOryza sativa L. · Rice
Louisiana State University Agricultural Center
IT
5 records
Cupar
ActiveDaucus carota L. · Carrot
BEJO ZADEN B.V, NL
NL
4 records
Charsano
ActiveBeta vulgaris Leaf Beet Group · Swiss chard
Rijk Zwaan, NL
NL
4 records
Clairamax
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
SAS FLORIMOND-DESPREZ Veuve et Fils
BE
4 records
Cascade
ActiveDaucus carota L. · Carrot
BEJO ZADEN
NL
4 records
Cayman
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
SESVanderhave NV
NL
4 records
Avalanche
ActiveBeta vulgaris Garden Beet Group · Garden beet
BEJO ZADEN
NL
7 records
Andromeda KWS
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
DE
4 records
Bailmaceight
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Schulze Justin,McBee Oren,Roberts David Jonathan
Korsak
ActiveGlycine max (L.) Merr. · Soybean
Sonets` Viktor Andriiovych, Pylypchenko Andrii Vasylovych, Tymchenko Viktor Naumovych, Marc Ham, Andre Letourneau, Alain Letourneau,
UA
6 records
HM 1820
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
Syngenta Crop Protection AG
IT
3 records
PIILAG VII
ActiveLagerstroemia L. · Crape Myrtle
Michael A. Dirr^^^Rhonda Helvick^^^Mark Griffith^^^Oren McBee^^^Jeff Beasley
PIILAG-VIII
ActiveLagerstroemia L. · Crape Myrtle
Michael Dirr
KW 915
TerminatedBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
DE
2 records
BTS 3610
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
Betaseed
DE
2 records
BTS 3020
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
Betaseed
DE
2 records
BTS 5770
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
Betaseed
DE
2 records
PIILAG-IX
Application submittedLagerstroemia L. · Crape Myrtle
Joshua H. Kardos, Bailey Nurseries Inc.
Nantes 2
ActiveDaucus carota L. · Carrot
BG
CZ
HU
PL
SI
SK
+1
12 records
Monodoro
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
ES
FR
HR
IT
SE
6 records