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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.

KWS Jordum

Active

Triticum aestivum L. · Bread wheat

Reiner Bothe^^^Nina Pfeiffer

LT
8 records

LG Aikido

Active

Triticum aestivum L. · Bread wheat

Limagrain Europe S.A.S

FR SK
5 records

KWS Cantare

Active

Triticum aestivum L. · Bread wheat

KWS Lochow

EE LT PL
4 records

KWS Criterium

Active

Triticum aestivum L. · Bread wheat

KWS MOMONT RECHERCHE SARL, FR

HR IT
6 records

Intro

Terminated

Triticum aestivum L. · Bread wheat

RAGT 2N S.A.S

DK FR
6 records

Hyvega

Active

Triticum aestivum L. · Bread wheat

Nordsaat Saatzucht GmbH Saatzucht Langenstein

PL UA
4 records

Jasmund

Active

Triticum aestivum L. · Bread wheat

SINA ISABEL STRUBE

EE
5 records

Dinosor

Terminated

Triticum aestivum L. · Bread wheat

Unisigma GIE (FR)/Societe Europeenne de Semences NV/SA (BE)

FR LT
6 records

Carletto

Active

Triticum aestivum L. · Bread wheat

Saatzucht Donau GmbH, Probstdorf AT

HU SK
4 records

Beaver

Protection expired

Triticum aestivum L. · Bread wheat

Plant Breeding International Cambridge Ltd (GB)

FR IE
6 records

WPB Marlin

Active

Triticum aestivum L. · Bread wheat

Wiersum Plantbreeding B.V.

BE NL
7 records

Actros

Terminated

Triticum aestivum L. · Bread wheat

Schweiger Weizen Gesellschaft Bürgerlichen Rechts

EE LT
5 records

Vuka

Terminated

Triticum aestivum L. · Bread wheat

Pflanzenzucht Oberlimpurg

DK HR
6 records

Zuhat

Active

x Triticosecale Wittm. ex A. Camus · Triticale

SEMILLAS BATLLE, S.A.

ES GR
4 records

Anduril

Terminated

Triticum aestivum L. · Bread wheat

INSTITUTE OF PLANT SCIENCE

SK UA
7 records

WPB Fairview

Active

Triticum aestivum L. · Bread wheat

Wiersum Plantbreeding B.V.

BE NL
7 records

Wendelin

Active

Triticum aestivum L. · Bread wheat

Secobra Recherches

LT
6 records

Vaiolet

Terminated

Triticum aestivum L. · Bread wheat

LUIGI SAMOGGIA

ES IT
4 records

Volpino

Active

x Triticosecale Wittm. ex A. Camus · Triticale

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

LT PL
6 records

Wafia

Active

Triticum aestivum L. · Bread wheat

Florimond Desprez Veuve et Fils, FR

ES FR
5 records

Wasp

Application submitted

Triticum aestivum L. · Bread wheat

NICKERSON (UK)

IE NL
6 records

Tejal

Active

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

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

NL UA
6 records

SU Agmar

Active

Triticum aestivum L. · Bread wheat

Nordsaat Saatzucht GmbH Saatzucht Langenstein

PL SE
6 records

SU Hycardi

Active

Triticum aestivum L. · Bread wheat

Asur Plant Breeding SAS

FR IT
6 records

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