Diseases
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.
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.
Hordeum vulgare L. · Barley
NICKERSON (UK)
Hordeum vulgare L. · Barley
SECOBRA RECHERCHES S.A.S
Hordeum vulgare L. · Barley
Syngenta UK Ltd
Hordeum vulgare L. · Barley
Syngenta UK Ltd
Hordeum vulgare L. · Barley
Limagrain Europe S.A.S
Hordeum vulgare L. · Barley
SARL ADRIEN MOMONT ET FILS, FR
Hordeum vulgare L. · Barley
Virágmag Kft., Szentgál
Hordeum vulgare L. · Barley
Sejet Planteforaedling I,S
Hordeum vulgare L. · Barley
Sejet Planteforaedling, DK-8700 Horsens
Hordeum vulgare L. · Barley
SAATZUCHT JOSEF BREUN GMBH and CO.KG
Hordeum vulgare L. · Barley
SAATZUCHT JOSEF BREUN GMBH and CO.KG
Hordeum vulgare L. · Barley
SAATZUCHT JOSEF BREUN GmbH&Co.KG
Hordeum vulgare L. · Barley
Syngenta UK Ltd
Hordeum vulgare L. · Barley
Syngenta Participations AG| CH
Hordeum vulgare L. · Barley
Syngenta Participations AG
Hordeum vulgare L. · Barley
Syngenta Participations AG
Hordeum vulgare L. · Barley
Probstdorfer Saatzucht Ges.m.b.H & Co KG
Hordeum vulgare L. · Barley
SYNGENTA SEEDS A.G.
Hordeum vulgare L. · Barley
Limagrain Europe S.A.S
Hordeum vulgare L. · Barley
Syngenta Participations AG
Hordeum vulgare L. · Barley
SAS FLORIMOND DESPREZ VEUVE and FILS
Hordeum vulgare L. · Barley
Syngenta Crop Protection AG
Hordeum vulgare L. · Barley
Sejet Planteforaedling I,S
Hordeum vulgare L. · Barley
Saatzucht Donau GmbH & Co.KG