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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 Blackcurrant 16 Celery 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.

Laban

Protection expired

Triticum aestivum L. · Bread wheat

Graminor AS, N-2322 Ridabu

3 records

Gallant

Active

Triticum aestivum L. · Bread wheat

Syngenta UK Ltd

5 records

Gulliver

Terminated

Triticum aestivum L. · Bread wheat

Nickerson International Research S.N.C.

3 records

Freiston

Active

Triticum aestivum L. · Bread wheat

ELSOMS WHEAT

4 records

Dilago

Active

Triticum aestivum L. · Bread wheat

Agroscope

4 records

Conqueror

Terminated

Triticum aestivum L. · Bread wheat

KWS UK LTD

3 records

Chilton

Terminated

Triticum aestivum L. · Bread wheat

DEUTSCHE SAATVEREDELUNG AG

3 records

Cadlimo

Active

Triticum aestivum L. · Bread wheat

Agroscope

4 records

Cougar

Terminated

Triticum aestivum L. · Bread wheat

RAGT 2N S.A.S

6 records

Chereshneva

Active

Ribes nigrum L. · Blackcurrant

V. Kopan c/o Institute of Horticulture Research Centre

6 records

Cambrena

Active

Triticum aestivum L. · Bread wheat

Dario Fossati Agroscope

5 records

Arlington

Active

Triticum aestivum L. · Bread wheat

PIONEER OVERSEAS CORPORATION

5 records

Arina

Active

Triticum aestivum L. · Bread wheat

Aldo Fossati Agroscope / F. Weilenmann Agroscope / F.X. Paccaud Agroscope / G. Popow Agroscope / Hans Winzeler Agroscope / P. Fried Agroscope / W. Saurer Agroscope

4 records

Arpitteta

Active

Triticum aestivum L. · Bread wheat

Agroscope (Changins)

4 records

Alchemy

Active

Triticum aestivum L. · Bread wheat

Nickerson International Research S.N.C.

4 records

SU Hystoric

Active

Triticum aestivum L. · Bread wheat

ASUR Plant Breeding S.A.S

FR
4 records

Brawura

Active

Triticum aestivum L. · Bread wheat

Danko Hodowla Roslin Sp.z.o.o.

LT PL
4 records

Ostroga

Active

Triticum aestivum L. · Bread wheat

Danko Hodowla Roslin Sp.z.o.o.

PL
5 records

Ostoja

Active

Triticum aestivum L. · Bread wheat

Poznanska Hodowla Roslin Sp. z o.o

PL UA
6 records

Fringante

Terminated

Avena sativa L. · Oat

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

FR HR
3 records

Corado

Protection expired

Triticum aestivum L. · Bread wheat

Otto Streng^^^Herbert Geißendörfer

IE
4 records

Aspect

Terminated

Triticum aestivum L. · Bread wheat

JOHANNA BERGER ^^^JOSEF BERGER^^^Stephan Berger

DK
4 records

Speldorado

Active

Triticum aestivum L. subsp. spelta (L.) Thell. · Spelt

Danko Hodowla Roslin Sp.z.o.o.

PL
5 records

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