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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.

Cavalier

Active

Triticum aestivum L. · Bread wheat

WORLD WIDE WHEAT L.L.C.

ES
4 records

Bojko

Active

Secale cereale L. · Rye

HODOWLA ROSLIN SMOLICE SP.ZOO

PL
6 records

Borodine

Active

x Triticosecale Wittm. ex A. Camus · Triticale

Serasem S.A.S.

FR
5 records

Bennington

Active

Triticum aestivum L. · Bread wheat

ELSOMS WHEAT

NL
8 records

Beltorax

Active

Triticum durum Desf. · Durum wheat

Syngenta Participations AG

IT
5 records

BG Elastika

Active

Triticum aestivum L. · Bread wheat

Biogranum, Novi Sad

BG
5 records

Battalion

Terminated

Triticum aestivum L. · Bread wheat

RAGT 2n

BE
7 records

Badensonne

Active

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

Universitaet Hohenheim

DE
5 records

Alessio

Active

Triticum aestivum L. · Bread wheat

Saatzucht Donau GmbH & Co.KG

AT
5 records

Angora

Active

Linum usitatissimum L. · Common flax

Linéa Semences de Lin G.I.E.

FR
6 records

Amarok

Application submitted

Triticum aestivum L. · Bread wheat

Nickerson SA (FR)

FR
6 records

Adriatic

Active

Triticum aestivum L. · Bread wheat

LEMAIRE DEFFONTAINES S.A.S.

FR
5 records

Tanker

Application submitted

Triticum aestivum L. · Bread wheat

Elsoms Seeds

6 records

Orator

Terminated

Triticum aestivum L. · Bread wheat

NICKERSON INTERNATIONAL RESEARCH SNC

4 records

Molera

Terminated

Triticum aestivum L. · Bread wheat

Federal Research Station for Plant Production

5 records

CDC Rattan

Active

Hordeum vulgare L. · Barley

University of Saskatchewan

5 records

Balino

Active

x Triticosecale Wittm. ex A. Camus · Triticale

Dario Fossati

6 records

Torysa

Active

Triticum aestivum L. · Bread wheat

RESEARCH INST.PLANT PRODU

ES SK
5 records

Ohio

Protection expired

Triticum aestivum L. · Bread wheat

W. von Borries-Eckendorf GmbH & Co.KG

DK PL
7 records

Trimobe

Active

x Triticosecale Wittm. ex A. Camus · Triticale

SAS Florimond Desprez Veuve & Fils

DE PL
5 records

Romulus

Active

Avena sativa L. · Oat

Danko Hodowla Roslin Sp.z.o.o.

FI PL
7 records

Panaso

Active

x Triticosecale Wittm. ex A. Camus · Triticale

Danko Hodowla Roslin Sp.z.o.o.

DE PL
6 records

KWS Constellum

Active

Triticum aestivum L. · Bread wheat

KWS MOMONT RECHERCHE SARL, FR

FR IT
5 records

KWS Conros

Active

Triticum aestivum L. · Bread wheat

KWS UK LTD

IE
7 records

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