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Diseases

Septoria leaf blotch

Septoria

Septoria leaf blotch is a complex fungal disease of cereal crops, manifesting as leaf and glume blotch, leading to tissue necrosis and yield reduction.

Mentioned in descriptions 4 644 varieties reference book.

The disease is caused by fungi of the genus Septoria and related species, which infect all above-ground parts of plants. Light beige or grey-brown spots form on leaves and stems, and black dots, known as pycnidia, develop on their surface over time. The disease is dangerous in temperate climates with high humidity and frequent rainfall.

Pathogen development depends on weather factors, particularly temperatures in the range of +15…+25 °C and air humidity above 80%. The disease leads to a reduction in the photosynthetic area, grain shriveling, and a decline in baking quality. The level of loss varies from 10–15% in normal years to 50% during epiphytotics.

Varietal resistance is divided into vertical, based on specific Stb genes, and horizontal, which is considered more long-lasting. Horizontal resistance is determined by morphological characteristics: cuticle density, pubescence, the presence of a waxy bloom, and lack of sensitivity to fungal toxins.

Resistance evaluation in variety trials is conducted using infectious-provocative backgrounds, visual assessment of the degree of infection, and laboratory methods, including molecular diagnostics. The obtained data are compared with reference indicators to determine the effectiveness of variety protection under specific conditions.

Sources10

Breakdown by crop

Septoria blotch — soft wheat 945 Septoria blotch of triticale 147 Septoria tritici blotch — durum wheat 128 Septoria blotch of oats 30 Septoria Leaf Blotch of Rye 26 Septoria Leaf Spot of Sunflower 23 Septoria Brown Spot — Soybean 21 Septoria Leaf Spot — Celeriac 21 Gooseberry Septoria Leaf Spot 21 Septoria blotch of barley 20 Septoria Blotch of Spelt 17 Septoria Blotch — Common Wheat 16 Septoria Leaf Spot of Black Currant 15 Septoria Leaf Spot — Celery 14 Septoria leaf spot of red currant 12 Septoria Blight of Wheat 9 Pear Septoria Leaf Spot 9 Parsley Septoria leaf spot 9 Tomato Septoria Leaf Spot 7 Septoria Blight of Pea 5 Celery Septoria Blight 4 Septoria Leaf Spot of Lettuce 3 Septoria Leaf Blotch of Naked Oats 3

Found in these crops

Bread wheat 933 Triticale 143 Durum wheat 127 Oat 30 Rye 26 Celeriac 25 Sunflower 23 Soybean 22 Gooseberry 21 Barley 20 Celery 16 Spelt 16

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.

Flinor

Protection expired

Triticum aestivum L. · Bread wheat

LEGLAND (FR)

FR
3 records

Flechedor

Terminated

Triticum aestivum L. · Bread wheat

Groupement Agricole Essonnois (FR)

FR
3 records

Gecko

Terminated

Triticum aestivum L. · Bread wheat

ERHARD EBMEYER

DE
3 records

Flavia

Active

Avena sativa L. · Oat

ISEA S.P.A.

IT
2 records

Figaro

Active

Avena sativa L. · Oat

Danko Hodowla Roslin Sp.z.o.o.

PL
4 records

Forridena

Active

Avena sativa L. · Oat

SEMILLAS BATLLE, S.A.

ES
2 records

Federer

Active

Triticum aestivum L. · Bread wheat

RAGT CZECH S.R.O.

CZ
3 records

Fabulor

Active

Triticum aestivum L. · Bread wheat

Unisigma G.I.E., Limagrain Europe S.A.S.

FR
4 records

Ethan

Active

Triticum aestivum L. · Bread wheat

Wiersum Plantbreeding B.V.

AT
3 records

Doubleshot

Terminated

Triticum aestivum L. · Bread wheat

RAGT 2n

SK
3 records

Enterprise

Active

Apium graveolens L. var. dulce (Mill.) Pers. · Celery

MRL Seeds Limited

NL
2 records

Don Valentín

Active

Triticum durum Desf. · Durum wheat

AGROVEGETAL, S.A.

ES
3 records

Don Maximo

Active

Triticum durum Desf. · Durum wheat

AGROVEGETAL, S.A.

ES
3 records

Don Ricardo

Active

Triticum durum Desf. · Durum wheat

AGROVEGETAL, S.A.

ES
3 records

Efektna

Active

Triticum aestivum L. · Bread wheat

STARYCHENKO VASYL MYKOLAIOVYCH, SHTAKAL MYKOLA IVANOVYCH, KOVALCHUK SERHII OLEKSANDROVYCH, DAVYDIUK HANNA VOLODYMYRIVNA, HOLYK LIUBOV MYKOLAIVNA

UA
3 records

Dorondon

Active

Triticum durum Desf. · Durum wheat

Genetica y Gestion S.L.

ES
3 records

Dobrodiika odeska

Active

Triticum aestivum L. · Bread wheat

Ihnatovskyi Oleksandr Oleksandrovych, Reshetnikova Valentyna Semenivna, Alieksieienko IEvhenii Viktorovych, Lytvynenko Raisa Ivanivna, Holub IEvheniia Anatoliivna, Honcharuk Nina Oleksandrivna, Lytvynenko Mykola Antonovych,

UA
3 records

Corvette

Active

Petroselinum crispum (Mill.) Nyman ex A. W. Hill · Parsley

Graines Voltz S.A.

FR
3 records

Denar

Terminated

Apium graveolens L. var. rapaceum (Mill.) Gaud. · Celeriac

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

PL
2 records

Cumbia

Active

Apium graveolens L. var. dulce (Mill.) Pers. · Celery

Bejo Zaden B.V.

NL
3 records

Chinuk

Terminated

Triticum aestivum L. · Bread wheat

Galya Katrandzhieva

BG
2 records

Cappelle-desprez

Protection expired

Triticum aestivum L. · Bread wheat

Florimond Desprez SA (FR)

FR
2 records

Capuchon 8

Active

Triticum aestivum L. · Bread wheat

SEMILLAS BATLLE, S.A.

ES
2 records

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