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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.

LD Phi

Active

Triticum monococcum L. · Einkorn wheat

LEMAIRE DEFFONTAINES S.A.S.

DE
2 records

Leonardo

Terminated

Triticum durum Desf. · Durum wheat

Fratelli Menzo di Menzo Epifanio Salvatore & C. S.A.S.

IT
2 records

Lion

Active

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

Nunhems Germany GmbH

DE
3 records

LG Alistair

Active

Triticum aestivum L. · Bread wheat

Limagrain Europe S.A.S

FR
4 records

KWS Friese

Active

Triticum aestivum L. · Bread wheat

KWS Lochow

DE
3 records

KWS Foudre

Active

Triticum aestivum L. · Bread wheat

KWS MOMONT RECHERCHE SARL, FR

FR
2 records

LG Acolyte

Active

Triticum aestivum L. · Bread wheat

Limagrain Europe S.A.S

FR
3 records

Kubok

Active

Triticum aestivum L. · Bread wheat

Traskovetska Vita Anatoliivna, Fedchenko Volodymyr Pavlovych, Bosakovska Nataliia IUriivna, Rodenko Halyna Anatoliivna, Shpykuliak IEvhenii Anatoliiovych, Narhan Tetiana Pavlivna, Nakonechnyi Mykola IUriiovych, Yeryniak Mykola Ivanovych, Lyfenko Savelii P

UA
3 records

Kreator

Active

Avena sativa L. · Oat

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

PL
3 records

Kostanai

Application submitted

Triticum aestivum L. · Bread wheat

Brabant Cecile

EE
2 records

Kobold

Terminated

Triticum aestivum L. · Bread wheat

Ebrahim Kazman

DE
3 records

Kbira

Active

Avena sativa L. · Oat

SEMILLAS BATLLE, S.A.

ES
3 records

Kastell

Active

Triticum aestivum L. · Bread wheat

SECOBRA RECHERCHES S.A.S

DE
3 records

Jouvence

Active

Avena sativa L. · Oat

LEMAIRE DEFFONTAINES S.A.S.

FR
3 records

Iride

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

S.I.S. SOCIETA' ITALIANA SEMENTI

IT
2 records

Indios

Active

Phaseolus vulgaris L. · Common bean

TERZOLO GIOACHINO

IT
3 records

Jamajka

Active

Triticum aestivum L. · Bread wheat

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

PL
4 records

HAYDOCK

Withdrawn

Triticum aestivum L. · Bread wheat

P.BREED.INT.CAMBRIDGE

ES
3 records

Gyros

Active

Triticum aestivum L. · Bread wheat

Institut national de recherche pour l'agriculture, l'aliment (FR)/Agri Obtentions SA (FR)

FR
2 records

Grüne Perle

Active

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

KARL HILD

DE
2 records

Geek

Active

Triticum aestivum L. · Bread wheat

Institut national de recherche pour l'agriculture, l'aliment (FR)/Agri Obtentions SA (FR)

FR
3 records

Flodur

Terminated

Triticum durum Desf. · Durum wheat

Groupement Agricole Essonnois (FR)

FR
3 records

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