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Diseases

Powdery Mildew of Barley

Hordeum vulgare L.

A fungal disease of barley caused by the obligate biotroph Blumeria graminis f. sp. hordei, which manifests as a white coating on the above-ground organs of the plant.

In the reference 758 varieties crop Barley, where this is mentioned in the description.

The causal agent of the disease is the highly specialized fungus Blumeria graminis f. sp. hordei. The pathogen infects all above-ground plant organs, forming a superficial mycelium that attaches via appressoria and directs haustoria into epidermal cells for nutrient uptake. In mild climates, the fungus survives on winter crops, while in harsh conditions, it persists in the form of cleistothecia on plant debris.

Symptoms appear as a white, web-like coating that eventually densifies into cotton-like patches, which take on a yellowish-grey hue. At later stages, black dots—cleistothecia—develop within the coating. The infection leads to yellowing and wilting of leaves, impairment of photosynthesis, and grain shriveling.

Genetic protection of barley is based on the use of more than 100 identified resistance alleles, including the Mla and Ml genes and the mlo locus. Of particular importance are the mlo genes (e.g., mlo1, mlo11), which provide effective resistance by preventing the penetration of fungal haustoria into plant cells.

General information about the subject — on the page Powdery mildew.

Sources8

Varieties of Barley 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.

Rafaela

Active

Hordeum vulgare L. · Barley

Limagrain Europe S.A.S

BE BG DE HU RO
13 records

Bojos

Active

Hordeum vulgare L. · Barley

PLANT SELECT, SPOL. S R.O.

AT CZ HU LT SK
11 records

LG Zorica

Active

Hordeum vulgare L. · Barley

Limagrain Europe S.A.S. (FR)

AT BG CZ FR HU SK
11 records

Madras

Terminated

Hordeum vulgare L. · Barley

Nickerson International Research S.N.C.

BE DE ES FR HR
11 records

KWS Wallace

Active

Hordeum vulgare L. · Barley

KWS Lochow

AT CZ DE EE UA
12 records

Grit

Protection expired

Hordeum vulgare L. · Barley

VEB SAAT- UND PFLANZENGUT

DE DK IE IT NL SE
14 records

Daisy

Active

Hordeum vulgare L. · Barley

SESVanderhave NV

CZ DE DK EE LT
10 records

Datcha

Active

Hordeum vulgare L. · Barley

Secobra Saatzucht

AT DE FR UA
11 records

Ismena

Active

Hordeum vulgare L. · Barley

Saaten-Union

CZ PL
11 records

Malwinta

Active

Hordeum vulgare L. · Barley

Pajbjergfonden (DK)

DE FR LT RO
14 records

Finola

Active

Hordeum vulgare L. · Barley

Saatzucht Donau, A

AT HU UA
13 records

Mette

Protection expired

Hordeum vulgare L. · Barley

W WEIBULL

DK EE ES FI IT SE
13 records

Riviera

Active

Hordeum vulgare L. · Barley

RAGT SEEDS LTD

BE FR PL
13 records

Orcade

Active

Hordeum vulgare L. · Barley

Nordic Seeds A/S

CZ DE DK FR IE
10 records

Nicoletta

Terminated

Hordeum vulgare L. · Barley

Saatzucht Donau GmbH & Co.KG

AT DE HR LT SI
9 records

Colonia

Active

Hordeum vulgare L. · Barley

Claus Einfeldt

CZ DE FR PL
8 records

Maltesse

Active

Hordeum vulgare L. · Barley

Secobra, F

CZ FR
11 records

Neptun

Active

Hordeum vulgare L. · Barley

Sejet Planteforaedling I,S

CZ DK PL UA
9 records

Tyra

Active

Hordeum vulgare L. · Barley

Pajbjergfonden

DK FI SE
13 records

Sevilla

Active

Hordeum vulgare L. · Barley

Saatzucht Donau GmbH, Probstdorf AT

AT DE HU PL
10 records

Candesse

Protection expired

Hordeum vulgare L. · Barley

W VON BORRIES-ECKENDORF GMBH & CO. KOMMANDITGESELLSCHAFT

AT DE EE HU LT
10 records

LG Flynn

Active

Hordeum vulgare L. · Barley

LIMAGRAIN EUROPE

AT DE NL PL
10 records

Bombay

Active

Hordeum vulgare L. · Barley

SAATZUCHT JOSEF BREUN GMBH and CO.KG

DE DK HU PL
10 records

Trebon

Protection expired

Hordeum vulgare L. · Barley

W WEIBULL

DK EE ES FR
12 records

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