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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.

Wilhelm SZS

Active

Triticum aestivum L. · Bread wheat

DE
2 records

Senjorai

Active

Ribes nigrum L. · Blackcurrant

LT
2 records

Primorka

Active

Triticum aestivum L. · Bread wheat

SI
2 records

Pikant

Active

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

CZ
2 records

Parus

Terminated

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

DK
2 records

Nagymarosi

Active

Rubus idaeus L. · Red raspberry

HU
3 records

Ory

Active

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

RO
2 records

Lucas

Active

Pyrus communis L. · European pear

SI
2 records

Merlin

Active

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

CZ
2 records

Monet

Active

Apium graveolens L. var. rapaceum (Mill.) Gaud. · Celeriac

CZ
2 records

Mambo

Active

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

NL
3 records

Mandub

Terminated

Triticum aestivum L. · Bread wheat

DE
2 records

Lentjai

Active

Ribes nigrum L. · Blackcurrant

EE
3 records

Liberta

Terminated

Triticum aestivum L. · Bread wheat

Bc Institut d.d. Zagreb (HR)

HR
2 records

Iris

Active

Solanum melongena L. · Eggplant

HU
2 records

Jasper

Terminated

Solanum lycopersicum L. · Tomato

NL
2 records

Granada

Terminated

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

NL
2 records

Ida Gold

Active

Solanum lycopersicum L. · Tomato

AT
2 records

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