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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.

Opera PR

Active

Helianthus annuus L. · Sunflower

SYNGENTA SEEDS AG, CH

BG HR HU IT UA
11 records

P63LE75

Active

Helianthus annuus L. · Sunflower

Pioneer Overseas Corporation US (USA)

AT HR HU SK UA
14 records

Pr64g46

Active

Helianthus annuus L. · Sunflower

Shatsman Dmytro Oleksandrovych

BG ES HR HU UA
13 records

ES Veronika

Active

Helianthus annuus L. · Sunflower

Euralis Semences, F

BG FR IT UA
12 records

ES Genesis

Active

Helianthus annuus L. · Sunflower

Euralis Semences, F

BG ES RO
11 records

P64LP130

Active

Helianthus annuus L. · Sunflower

Sadik El Sayed

ES RO UA
16 records

Arena

Active

Helianthus annuus L. · Sunflower

PAU SEMENCES S.A.

BG HR IT SK UA
10 records

Sumatra

Active

Helianthus annuus L. · Sunflower

Syngenta Participations AG| CH

AT IT RO UA
9 records

SY Corsica AR

Active

Helianthus annuus L. · Sunflower

Syngenta Participations AG., Basel CH

AT ES HR HU RO UA
11 records

KWS Apache CL

Active

Helianthus annuus L. · Sunflower

KWS SAAT SE, KWS Semena Bulgaria EOOD

BG HR IT RO SK UA
11 records

SY Diego CLP

Active

Helianthus annuus L. · Sunflower

Syngenta Participations,CH

ES HU IT RO UA
11 records

Surest

Active

Helianthus annuus L. · Sunflower

Syngenta Crop Protection,CH

AT IT RO SK UA
12 records

NK Adagio

Active

Helianthus annuus L. · Sunflower

Syngenta Crop Protection AG, Seeds Division, CH

BG HR HU SK UA
14 records

Forum

Active

Helianthus annuus L. · Sunflower

ZhUZhUKIN VALERIJ IVANOVICh / KOYuDA SERGEJ PETROVICh / ZAJTSEV SERGEJ ALEKSANDROVICh / VOLKOV DMITRIJ PETROVICh / KRASIL'NIKOVA MARINA VLADIMIROVNA

HR IT PT SK UA
10 records

Diabolo

Active

Helianthus annuus L. · Sunflower

LIMAGRAIN GENETICS (FR)

BG ES HR HU SK
8 records

Arunasun IR

Active

Helianthus annuus L. · Sunflower

Elena Andreea Teodorescu

AT HU RO SK UA
9 records

Subaro

Active

Helianthus annuus L. · Sunflower

Syngenta Crop Protection,CH

BG IT RO UA
11 records

P64le11

Active

Helianthus annuus L. · Sunflower

Pioneer Overseas Cor, USA

HR HU RO UA
12 records

P64lc53

Active

Helianthus annuus L. · Sunflower

Sadyk El` Saied

ES IT RO UA
12 records

Marbelia CL

Active

Helianthus annuus L. · Sunflower

Rene Baraten

IT RO SK UA
11 records

KWS Dragon

Active

Helianthus annuus L. · Sunflower

SYNGENTA FRANCE S.A.S.

HR IT PT UA
11 records

ES Idillic

Active

Helianthus annuus L. · Sunflower

LIDEA FRANCE SAS

FR IT SK UA
10 records

Impact

Active

Helianthus annuus L. · Sunflower

NUSEED SERBIA

IT SK UA
10 records

SY Katana CLP

Active

Helianthus annuus L. · Sunflower

Syngenta Participations,CH

RO SK UA
11 records

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