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Diseases

Powdery mildew of oats

Avena sativa L.

A fungal disease of common oats caused by the specialized form of the ascomycete Blumeria graminis f. sp. avenae. It manifests as a white, web-like coating on plant organs, which reduces the intensity of photosynthesis and grain yield by 10–20% or more.

In the reference 176 varieties crop Oat, where this is mentioned in the description.

The pathogen infects plants at early developmental stages, forming matte spots on leaf sheaths that transform into a loose white coating. During the growing season, the coating densifies into cotton-like pads on leaves and stems, and by maturity, it acquires a dirty-gray hue and becomes covered with black dots — cleistothecia. The infection leads to the destruction of chlorophyll, reduced tillering, and a slowdown in the overall growth of the crop.

The pathogen is characterized by high physiological specialization and the presence of numerous races with varying virulence. Genetic resistance to powdery mildew in cultivated oats is limited and controlled by four dominant genes. For the breeding of new varieties, resistance sources from wild species such as Avena barbata, Avena strigosa, and Avena hirtula are actively utilized.

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

Sources8

Varieties of Oat 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.

Avena sativa L. · Oat

RAGT 2N S.A.S

FR
5 records

Avena sativa L. · Oat

KWS MOMONT RECHERCHE SARL, FR

FR
3 records

Gepard

Active

Avena sativa L. · Oat

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

PL
4 records

Sinaba

Terminated

Avena sativa L. · Oat

Dr. Hartmut Spieß

DE
3 records

Flavia

Active

Avena sativa L. · Oat

ISEA S.P.A.

IT
2 records

Huzar

Active

Avena sativa L. · Oat

Danko Hodowla Roslin Sp.z.o.o.

PL
4 records

Siwek

Terminated

Avena sativa L. · Oat

Malopolska Hodowla Roslin Spolka z o.o.

PL
2 records

Koneser

Protection expired

Avena sativa L. · Oat

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

PL
5 records

Anchuela

Terminated

Avena sativa L. · Oat

SIA(COM.MADRID)INIA(MADRI

ES
2 records

Belfer

Active

Avena sativa L. · Oat

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

PL
3 records

Avena sativa L. · Oat

SEMILLAS BATLLE, S.A.

ES
2 records

Neptun

Active

Avena sativa L. · Oat

NORDSAAT SAATZUCHT

DE
3 records

Kreator

Active

Avena sativa L. · Oat

Hodowla Roslin Strzelce Sp z.o.o. Grupa IHAR

PL
3 records

Maris quest

Protection expired

Avena sativa L. · Oat

Plant Breeding International Cambridge Ltd (GB)

FR
4 records

Avena sativa L. · Oat

Lietuvos agrarinių ir miškų mokslų centras

LT
3 records

Kbira

Active

Avena sativa L. · Oat

SEMILLAS BATLLE, S.A.

ES
3 records

Maris tabard

Protection expired

Avena sativa L. · Oat

Plant Breeding International Cambridge Ltd (GB)

FR
4 records

Brawi

Terminated

Avena sativa L. · Oat

LOCHOW-PETKUS

ES
2 records

Kaspero

Active

Avena sativa L. · Oat

Dr. Hartmut Spieß

DE
3 records

Breton

Active

Avena sativa L. · Oat

Danko Hodowla Roslin Sp.z.o.o.

PL
3 records

Baranja

Active

Avena sativa L. · Oat

Bc Institut d.d. Zagreb (HR)

HR
2 records

Jouvence

Active

Avena sativa L. · Oat

LEMAIRE DEFFONTAINES S.A.S.

FR
3 records