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Diseases

Leaf blotch — soft wheat

Triticum aestivum L.

A group of fungal diseases of wheat, including Septoria tritici blotch, tan spot, and spot blotch. The diseases have similar symptoms but differ in pathogens and genetic mechanisms of interaction with the host plant.

In the reference 239 varieties crop Bread wheat, where this is mentioned in the description.

The most common pathogens of leaf blotch are Zymoseptoria tritici (Septoria tritici blotch), manifested by black pycnidia in light-colored spots; Pyrenophora tritici-repentis (tan spot), characterized by spots with a chlorotic halo; and Bipolaris sorokiniana (spot blotch), which forms brown spots with a dark border.

The genetic control of resistance involves specific loci. For Septoria tritici blotch, genes of the Stb series (e.g., Stb16q, Stb7) have been identified. Resistance to tan spot is closely linked to the Tsn1 locus: the presence of the dominant allele makes the variety susceptible to the ToxA toxin produced by the pathogen, which exacerbates necrotic lesions.

At least eight races have been described for tan spot, classified by virulence on sets of differential varieties. Physiological leaf spot, which arises as a reaction to stress factors or phytotoxicity of chemicals and has no genetic resistance nomenclature, should be distinguished from infectious leaf blotches.

General information about the subject — on the page Leaf spot diseases.

Sources8

Varieties of Bread wheat mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.

Akratos

Active

Triticum aestivum L. · Bread wheat

Strube Research GmbH & Co. KG, D- 38387 Sollingen

EE FR HR LT SE UA
14 records

Ténor

Active

Triticum aestivum L. · Bread wheat

Unisigma GIE Recherche et Selection (FR)

FR HR IT PT UA
19 records

Leidi

Active

Triticum aestivum L. · Bread wheat

Mika Hyövelä, Esa Teperi, Boreal Plant Breeding Ltd.

EE FI LT LV SE UA
13 records

Flair

Protection expired

Triticum aestivum L. · Bread wheat

SAATZUCHT HANS SCHWEIGER & CO OHG

BE DK EE LT PL
13 records

SW Harnesk

Protection expired

Triticum aestivum L. · Bread wheat

Lantmannen SW Seed AB, SE-268 81 Svalof

EE FI LT LV SE
12 records

KWS Spencer

Active

Triticum aestivum L. · Bread wheat

KWS Lochow

EE FI LT PL UA
12 records

Tulsa

Active

Triticum aestivum L. · Bread wheat

WIERSUM PLANTBREEDING B.V.

AT BE DK NL SE
12 records

Iridium

Active

Triticum aestivum L. · Bread wheat

SARL ADRIEN MOMONT ET FILS, FR

FR LT SK
9 records

Nimfa

Active

Triticum aestivum L. · Bread wheat

Stacja Hodowli Roślin MODZURÓW Grupa Szelejewo sp. z o.o.

LT PL
10 records

LG Mocca

Active

Triticum aestivum L. · Bread wheat

Limagrain Europe S.A.S

BE DK LU
8 records

Jenga

Terminated

Triticum aestivum L. · Bread wheat

Nordsaat Saatzuchtgesellschaft mbH

AT NL PL SE
7 records

Marin

Terminated

Triticum aestivum L. · Bread wheat

LOCHOW - PETKUS F., G.M.B.H.

BE EE LT
6 records

Asketis

Terminated

Triticum aestivum L. · Bread wheat

STRUBE GMBH&CO.KG

BE DK PL
11 records

KWS Espinum

Active

Triticum aestivum L. · Bread wheat

Nina Pfeiffer

EE LT PL UA
7 records

WPB Francis

Active

Triticum aestivum L. · Bread wheat

WIERSUM PLANTBREEDING

EE LT PL
7 records

Biscay

Protection expired

Triticum aestivum L. · Bread wheat

TWYFORD SEEDS LTD

BE FR
11 records

SU Canolon

Active

Triticum aestivum L. · Bread wheat

Asur Plant Breeding, F

FR HR
8 records

Sibelius

Active

Triticum aestivum L. · Bread wheat

STRUBE D and S GMBH

EE FI
7 records

Bagou

Active

Triticum aestivum L. · Bread wheat

SAATEN UNION RECHERCHE

FR PL
7 records

Hedvika

Terminated

Triticum aestivum L. · Bread wheat

Limagrain Nederland B.V.

LT PL SK
5 records

Seladon

Active

Triticum aestivum L. · Bread wheat

SELGEN A.S

PL SK
5 records

WPB Scotch

Terminated

Triticum aestivum L. · Bread wheat

Wiersum Plantbreeding B.V.

PL SE
5 records

Senat

Terminated

Triticum aestivum L. · Bread wheat

Sejet Planteforaedling I,S

DK LT
6 records

Pasteur

Active

Triticum aestivum L. · Bread wheat

Wiersum Plantbreeding B.V.

NL PL
6 records