QC Bond
Protection expiredHelianthus annuus L. · Sunflower
RO
3 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.
NS Lord
ActiveHelianthus annuus L. · Sunflower
RO
3 records
NS Tor
ActiveHelianthus annuus L. · Sunflower
SK
3 records
NS Sumo 2017
ActiveHelianthus annuus L. · Sunflower
UA
8 records
Ilinca 115
ActiveHelianthus annuus L. · Sunflower
RO
3 records
GK Mandala
Protection expiredHelianthus annuus L. · Sunflower
RO
3 records
Daytona
ActiveHelianthus annuus L. · Sunflower
RO
4 records
Caroline CLP
Protection expiredHelianthus annuus L. · Sunflower
RO
3 records
Arteon CL
Protection expiredHelianthus annuus L. · Sunflower
RO
3 records
Tastysun
ActiveHelianthus annuus L. · Sunflower
SK
3 records
NS Sumo Vita
ActiveHelianthus annuus L. · Sunflower
RO
3 records
NS Euforia
ActiveHelianthus annuus L. · Sunflower
RO
3 records
Iregi Szurke Csikos
ActiveHelianthus annuus L. · Sunflower
HU
3 records
Fundulea 911
Protection expiredHelianthus annuus L. · Sunflower
RO
3 records
Demetra
ActiveHelianthus annuus L. · Sunflower
RO
3 records
RHA-SEL
ActiveHelianthus annuus L. · Sunflower
UA
3 records
MAS 880L
ActiveHelianthus annuus L. · Sunflower
SK
2 records
LS Pickit
ActiveHelianthus annuus L. · Sunflower
SK
2 records
QC Rioleico
TerminatedHelianthus annuus L. · Sunflower
P64LE15
ActiveHelianthus annuus L. · Sunflower
Kostasol
ActiveHelianthus annuus L. · Sunflower
Hysun 158T
ActiveHelianthus annuus L. · Sunflower
Enei
Application submittedHelianthus annuus L. · Sunflower
UA
2 records
AS 33101
ActiveHelianthus annuus L. · Sunflower
UA
2 records