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.

Normandy

Active

Hordeum vulgare L. · Barley

Nordic Seed A/S

CZ DE DK

11 records

SY Tepee

Active

Hordeum vulgare L. · Barley

Syngenta Seeds, UK

10 records

Barcelona

Terminated

Hordeum vulgare L. · Barley

DLF SEEDS A/S

DE PL SK

8 records

Fabiola

Active

Hordeum vulgare L. · Barley

Nordsaat Saatzuchtgesellschaft mbH

AT FI UA

9 records

Adonis

Active

Hordeum vulgare L. · Barley

Nickerson UK Ltd, Suffolk (UK)

DE FR HR

12 records

Kondrat

Active

Hordeum vulgare L. · Barley

Herasymova Anastasiia Ivanivna, Suprunenko Viktoriia Mykolaivna, Levshtanov Serhii Oleksandrovych, Ostanina Tamara Vitaliivna, Sukhorada Oleksii Ivanovych, Kremzina Ol`ha Mykhailivna, Vasiukov Pavlo Petrovych, Kuznietsova Tamara IEvheniivna, Serkin Mykola

7 records