BG N 4
ActiveHelianthus annuus L. · Sunflower
Cvejic Sandra, Jocic Sinisa,
UA
5 records
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.
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.
Avalon
ActiveHelianthus annuus L. · Sunflower
PARIJ YaROSLAV FEDOROVICh / PARIJ MIROSLAV FEDOROVICh / ZOLOTAREV KONSTANTIN MITROFANOVICh / YaKOVENKO ANATOLIJ ALEKSANDROVICh
UA
4 records
Apolonia CS
ActiveHelianthus annuus L. · Sunflower
CAUSSADE SEMENCES
IT
3 records
AGA 1301
ActiveHelianthus annuus L. · Sunflower
Agromar Marmara Tarim Ürünleri SAN.TIC.A.S (TR)
BG
3 records
OR182DMR
ActiveHelianthus annuus L. · Sunflower
Nidera S.A.
IR180DMR
ActiveHelianthus annuus L. · Sunflower
Nidera S.A.
IB1168DMR
ActiveHelianthus annuus L. · Sunflower
Nidera S.A.
IR179DMR
ActiveHelianthus annuus L. · Sunflower
Nidera S.A.
IR139DMR
ActiveHelianthus annuus L. · Sunflower
Nidera S.A.
IB1088DMR
ActiveHelianthus annuus L. · Sunflower
Nidera S.A.
IB1170DMR
ActiveHelianthus annuus L. · Sunflower
Nidera S.A.
P64LE218
ActiveHelianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
ES
UA
4 records
Meteor
ActiveHelianthus annuus L. · Sunflower
SEMENCES NICKERSON S.A.
ES
IT
3 records
MAS 835OL
ActiveHelianthus annuus L. · Sunflower
MAS Seeds,FR
FR
IT
3 records
LID2067H
ActiveHelianthus annuus L. · Sunflower
Lidea France SAS, FR
BG
SK
3 records
Duncan CLP
ActiveHelianthus annuus L. · Sunflower
Syngenta Crop Protection AG, CH
FR
UA
5 records
NS H 6054
ActiveHelianthus annuus L. · Sunflower
Miladinovie Dragana, Cvejie Sandra, Jocie Sinisa,
UA
4 records
Petenera
ActiveHelianthus annuus L. · Sunflower
SEMILLAS BATLLE S.A.
IT
3 records
LG5577
TerminatedHelianthus annuus L. · Sunflower
LIMAGRAIN EUROPE S.A.
IT
3 records
Tellus
ActiveHelianthus annuus L. · Sunflower
Rotaru Igor Tudor, Rotaru Vitalie Tudor, Rotaru Tudor Grigore,
UA
4 records
P64LE23
ActiveHelianthus annuus L. · Sunflower
PIONEER OVERSEAS CORPORATION
BG
3 records
MAS 91OL
TerminatedHelianthus annuus L. · Sunflower
MAS SEEDS
IT
3 records
MAS 908HO CP
ActiveHelianthus annuus L. · Sunflower
RO
3 records
Maritza
ActiveHelianthus annuus L. · Sunflower
INTERDOR, FR
FR
3 records