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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 Spelt 16 Blackcurrant 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.

Tillsano

Active

Triticum aestivum L. · Bread wheat

Saatzucht Donau GmbH & Co.KG

AT
3 records

Stanko

Active

Secale cereale L. · Rye

PRZEDSIęBIORSTWO NASIENNE "ROLNAS" SP. Z O.O.

PL
3 records

Spectral

Active

Triticum aestivum L. · Bread wheat

Sejet Planteforaedling I,S

DE
3 records

SU Juri

Active

Triticum aestivum L. · Bread wheat

W. von Borries-Eckendorf GmbH & Co.KG

DE
3 records

Stakado

Terminated

Triticum aestivum L. · Bread wheat

ABED FONDEN

DK
3 records

STETSON

Terminated

Triticum aestivum L. · Bread wheat

NICKERSON (UK)

IE
3 records

Spadshchyna odeska

Active

Triticum aestivum L. · Bread wheat

Rybalka Oleksandr Illich, Maksymov Mykola Havrylovych, Marinin Liubov Ivanivna, Reshetnikova Valentyna Semenivna, Lytvynenko Raisa Ivanivna, Solomonov Ruslan Viacheslavovych, Holub IEvheniia Anatoliivna, Rubakha Serhii Andriiovych, Honcharuk Nina Oleksand

UA
3 records

Sissy

Active

Pyrus communis L. · European pear

Vasilios Kempapidis

GR
4 records

Sinatra

Active

Triticum aestivum L. · Bread wheat

SECOBRA RECHERCHES S.A.S

DE
3 records

Sierra de Almaraz

Terminated

x Triticosecale Wittm. ex A. Camus · Triticale

SIA(J.EXTRE.)/INIA(MADRID)

ES
2 records

Serein

Active

Triticum aestivum L. · Bread wheat

Florimond Desprez Veuve et Fils, FR

FR
2 records

Sekret

Active

x Triticosecale Wittm. ex A. Camus · Triticale

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

PL
3 records

Senatrit

Active

x Triticosecale Wittm. ex A. Camus · Triticale

Senasa

ES
3 records

Scoop

Withdrawn

Triticum aestivum L. · Bread wheat

SARL ADRIEN MOMONT ET FILS, FR

FR
3 records

SALAMANCA

Active

Helianthus annuus L. · Sunflower

JOSE RAMON PEREZ MONREAL

UA
3 records

SANDOWN

Terminated

Triticum aestivum L. · Bread wheat

P.BREED.INT.CAMBRIDGE

ES
3 records

Samuno

Terminated

Triticum aestivum L. · Bread wheat

ERHARD EBMEYER

DE
3 records

Sanjit

Active

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

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL
2 records

Rusałka

Active

Triticum aestivum L. · Bread wheat

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

PL
5 records

Rubin

Active

Triticum aestivum L. · Bread wheat

Kärntner Saatbau e.Gen.

AT
2 records

Rumboso

Active

x Triticosecale Wittm. ex A. Camus · Triticale

AGROVEGETAL, S.A.

ES
3 records

RGT Dempsey

Active

Avena sativa L. · Oat

RAGT 2n, FR

FR
3 records

RGT Zunder

Active

Triticum aestivum L. · Bread wheat

RAGT 2N S.A.S

DE
3 records

RGT Technik

Active

Triticum aestivum L. · Bread wheat

RAGT 2N S.A.S

PL
3 records

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