Diseases
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.
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.
Helianthus annuus L. · Sunflower
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Helianthus annuus L. · Sunflower
Euralis Semences
Helianthus annuus L. · Sunflower
NORTHRUP KING
Helianthus annuus L. · Sunflower
Csikasz Tamas / Walz Ilona / Takacs Laszlo / Meszaros Laszlo
Helianthus annuus L. · Sunflower
Rene Baratin
Helianthus annuus L. · Sunflower
Asgrow France SA (FR)
Helianthus annuus L. · Sunflower
DAKOTA UNIV.
Helianthus annuus L. · Sunflower
Makov`eva Nadiia Petrivnav, Kusch Viacheslav Stepanovych, Herasymenko Oksana Oleksandrivna, Pershyna Liliia Vasylivna, Dymytrov Heorhii Demianovych, Skakun Vadym Mykhailovych,
Helianthus annuus L. · Sunflower
DAKOTA UNIV.
Helianthus annuus L. · Sunflower
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Helianthus annuus L. · Sunflower
DAKOTA UNIV.
Helianthus annuus L. · Sunflower
LES GOURGUES-G-CARGILL
Helianthus annuus L. · Sunflower
Burlov Viktor Viktorovych, Burlov Viktor Vasylovych,
Helianthus annuus L. · Sunflower
Burlov Viktor Vasylovych
Helianthus annuus L. · Sunflower
Filipp Dzhouv
Helianthus annuus L. · Sunflower
Burlov Viktor Viktorovych, Burlov Viktor Vasylovych,
Helianthus annuus L. · Sunflower
Fermerske hospodarstvo "Novoiehorivka-Ahro"
Helianthus annuus L. · Sunflower
Joel Meunier
Helianthus annuus L. · Sunflower
Surovikin Volodymyr Mykolaiovych, Sliusar Emiliia L`vivna, Obydalo Dmytro Ivanovych, Borodin Serhii Heorhiiovych, Pustovoit Halyna Vasylivna, Ilatovs`kyi Volodymyr Platonovych,
Helianthus annuus L. · Sunflower
Euralis Semences FR
Helianthus annuus L. · Sunflower
Euralis Semences
Helianthus annuus L. · Sunflower
Didier Sauvaire
Helianthus annuus L. · Sunflower
Euralis Semences
Helianthus annuus L. · Sunflower
AGROMAR MARMAR TARIM ÜRÜNLERI SAN. VE TIC. A.Ş. (TR)