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Diseases

Downy mildew of sunflower

Helianthus annuus L.

A systemic disease of sunflower caused by the oomycete Plasmopara halstedii, which persists in the soil for up to 8 years and infects the plant through the root system.

In the reference 905 varieties crop Sunflower, where this is mentioned in the description.

The pathogen Plasmopara halstedii is capable of forming more than 30 races, of which 330, 334, 710, and 730 are the most common in Russia. The pathogen penetrates the plant at early growth stages, causing stunting, chlorotic spots along the leaf veins, and the appearance of white felt-like mycelium on the underside of the leaves. The disease can lead to underdeveloped flower heads and empty achenes.

Up to six forms of infection manifestation are distinguished, ranging from early seedling death to latent infection, the symptoms of which only become visible by the flowering stage. In breeding for resistance to the pathogen, Pl genes are used (e.g., Pl6, Pl8, Plarg, Pl5+). Since the pathogen mutates actively, the most effective method of control is the development of genotypes with a combination of these genes to provide protection against a broad spectrum of races.

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

Sources8

Varieties of Sunflower 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.

Suvora

Active

Helianthus annuus L. · Sunflower

Syngenta Crop Protection AG

ES IT RO UA
9 records

P64LP196

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION

ES IT RO UA
9 records

P64HH150 

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION

IT PT SK UA
10 records

P63HE189

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION

ES IT PT UA
10 records

P64le269

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION

ES PT RO UA
10 records

LID1068L SU

Active

Helianthus annuus L. · Sunflower

Lidea France SAS, FR

BG IT RO UA
8 records

LG50500

Active

Helianthus annuus L. · Sunflower

Remy ROUANET

ES IT RO UA
8 records

KWS Cesares CL

Active

Helianthus annuus L. · Sunflower

KWS SAAT SE & CO.KGAA

IT RO SK UA
9 records

KWS Augustes CL

Active

Helianthus annuus L. · Sunflower

KWS SAAT SE & CO.KGAA

IT RO SK UA
7 records

SY Chronos

Active

Helianthus annuus L. · Sunflower

Syngenta Participations AG c/o Syngenta International AG

AT FR PT UA
7 records

SY Excellio

Active

Helianthus annuus L. · Sunflower

SYNGENTA FRANCE S.A.S.

FR HU IT PT
9 records

SY Futura AR

Active

Helianthus annuus L. · Sunflower

Syngenta Participations AG., Basel CH

AT HU RO UA
9 records

SY Amazonia

Active

Helianthus annuus L. · Sunflower

SYNGENTA FRANCE S.A.S.

PT RO SK UA
9 records

P64LL187

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION US

AT FR RO UA
11 records

P63HH142

Active

Helianthus annuus L. · Sunflower

PIONEER OVERSEAS CORPORATION

IT PT SK UA
9 records

KWS Flexes CL

Active

Helianthus annuus L. · Sunflower

KWS SAAT SE, DE

RO SI SK UA
8 records

Hysun 298

Active

Helianthus annuus L. · Sunflower

Roberto Reid

IT PT RO UA
8 records

KWS Aventines

Active

Helianthus annuus L. · Sunflower

KWS SAAT SE, DE

RO SI SK UA
8 records

KWS Leones CL

Active

Helianthus annuus L. · Sunflower

KWS SAAT SE, DE

IT RO SI SK
7 records

ES Ceylon SU

Active

Helianthus annuus L. · Sunflower

Euralis Semences FR

BG ES IT UA
8 records

ES Epic

Active

Helianthus annuus L. · Sunflower

Euralis Semences FR

BG FR IT UA
9 records

Blizar RM

Protection expired

Helianthus annuus L. · Sunflower

Rustica Prograin Genetique SA (FR)

CZ FR IT PL
7 records

Barolo

Protection expired

Helianthus annuus L. · Sunflower

KWS Saat AG, DE

BG HU IT SK
8 records

CS Magenta

Active

Helianthus annuus L. · Sunflower

Frantz Boudet

IT RO SK UA
8 records

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