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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.

LG 56.65 M

Active

Helianthus annuus L. · Sunflower

Tuson Jean-Mark

BG FR HR IT RO SK +1
18 records

Mas 80 IR

Active

Helianthus annuus L. · Sunflower

Zhoel` Meun`er

ES FR HR IT RO UA
16 records

MAS 83 R

Active

Helianthus annuus L. · Sunflower

MAS Seeds,FR

ES FR HR IT RO UA
15 records

LG 5485

Active

Helianthus annuus L. · Sunflower

Remy ROUANET

BG ES FR IT SK UA
15 records

LG 5633 CL

Active

Helianthus annuus L. · Sunflower

Remy ROUANET

AT BG CZ RO SK UA
13 records

LG 56.35

Active

Helianthus annuus L. · Sunflower

LIMAGRAIN VERNEUIL HOLDING S.A.

BG IT RO SK UA
13 records

AL'ZAN

Active

Helianthus annuus L. · Sunflower

SEMENCES COOP DE PAU (FR)

AT BG CZ FR HR HU +1
12 records

P 64 LE 25

Active

Helianthus annuus L. · Sunflower

Revol Benua

BG HR IT RO UA
16 records

MAS 84 E

Active

Helianthus annuus L. · Sunflower

MAS Seeds,FR

AT BG CZ HR IT
13 records

P 64 HE 118

Active

Helianthus annuus L. · Sunflower

Pioneer Overseas Corporation, USA

AT HU IT SK UA
16 records

LG 55.80

Active

Helianthus annuus L. · Sunflower

Limagrain Verneuil Holding (FR)

BG IT SK UA
13 records

MAS 92 IR

Active

Helianthus annuus L. · Sunflower

MAS Seeds,FR

CZ ES HR IT UA
10 records

LG 50521 CLP

Active

Helianthus annuus L. · Sunflower

Remy ROUANET

ES IT RO SK UA
12 records

P 64 LC 108

Active

Helianthus annuus L. · Sunflower

Sadik El Sayed

BG ES UA
14 records

MAS 82 A

Active

Helianthus annuus L. · Sunflower

MAS SEEDS

AT ES IT RO UA
10 records

LG50479 SX

Active

Helianthus annuus L. · Sunflower

Remy ROUANET

BG IT RO SK UA
14 records

P 64 LE 99

Active

Helianthus annuus L. · Sunflower

Revol Benoit

HR HU IT UA
15 records

LG 5550

Active

Helianthus annuus L. · Sunflower

Limagrain-Advanta Nederland B.V.

BG ES RO UA
11 records

MAS 92 CP

Active

Helianthus annuus L. · Sunflower

Maisadour Semences, F

ES RO SK UA
10 records

LG 5543 CL

Active

Helianthus annuus L. · Sunflower

LIMAGRAIN VERNEUIL HOLDING S.A.

BG IT SK UA
12 records

LG 5478

Active

Helianthus annuus L. · Sunflower

Remy ROUANET

AT HU IT UA
11 records

LG 50585

Active

Helianthus annuus L. · Sunflower

Remy ROUANET

BG IT SK UA
11 records

LG50545 CLP

Active

Helianthus annuus L. · Sunflower

LIMAGRAIN EUROPE S.A.

HU IT SK UA
11 records

LG 5555 CLP

Active

Helianthus annuus L. · Sunflower

Remy ROUANET

BG IT RO UA
12 records

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