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
Stepanov IEvhenii Olehovych, Parii IUliia Oleksandrivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,
Helianthus annuus L. · Sunflower
N.DAKOTA UNI.FARGO
Helianthus annuus L. · Sunflower
Dobroudja Agricultural Institute - General Toshevo (BG)
Helianthus annuus L. · Sunflower
Jockovic Milan, Jocic Sinisa, Cvejic Sandra,
Helianthus annuus L. · Sunflower
Rustica Prograin Genetique SA (FR)
Helianthus annuus L. · Sunflower
Cvejic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Kryvosheieva Olena Vatslavivna, Veselyi Vitalii Oleksandrovych, Kuz`myshyna Nadiia Viktorivna, Syvenko Valentyna Ivanivna, Makliak Kateryna Mykolaivna, Alad`ina Zoia Kyrylivna, Kyrychenko Viktor Vasylovych,
Helianthus annuus L. · Sunflower
Nicolae Parvu
Helianthus annuus L. · Sunflower
Hostieva Natalia Volodymyrivna, Hostiev IEvhen IUriiovych,
Helianthus annuus L. · Sunflower
INTERDOR IBERICA, S.L.
Helianthus annuus L. · Sunflower
Panikarov Fedir IUriiovych, Hanzhelo Mykola Hryhorovych, Krut`ko Vasyl` Ivanovych, Karapira Serhii Ivanovych, Varenyk Borys Fedorovych,
Helianthus annuus L. · Sunflower
EURALIS GENETIQUE
Helianthus annuus L. · Sunflower
Stupak Iryna IUriivna, Rusavskyi Vladyslav Leonidovych, Parii Myroslav Fedorovych, Parii IUliia Oleksandrivna, Kyryienko Serhii Oleksandrovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,
Helianthus annuus L. · Sunflower
Kyrychenko Maryna Serhiivna, Babych Viktoriia Olehivna, Parii Fedir Mykytovych, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych,
Helianthus annuus L. · Sunflower
Steve Thompson
Helianthus annuus L. · Sunflower
Adnan Tulek
Helianthus annuus L. · Sunflower
Steve Thompson
Helianthus annuus L. · Sunflower
EURALIS SEMILLAS, S.A.
Helianthus annuus L. · Sunflower
Frederic Poujaud
Helianthus annuus L. · Sunflower
Maisadour Semences, FR
Helianthus annuus L. · Sunflower
Hostiev IEvhen IUriiovych
Helianthus annuus L. · Sunflower
Borovs`ka Iryna IUriivna, Petrenkova Vira Pavlivna, Brahin Oleksandr Mykolaiovych, Tymchuk Serhii Mykhailovych, Satarov Oleksandr Zainulovych, Syvenko Oleksandr Anatoliiovych, Popova Ol`ha Andriivna, Kolomatska Valeriia Pavlivna, Syvenko Valentyna Ivanivn
Helianthus annuus L. · Sunflower
GORBAChENKO FEDOR IVANOVICh / GORBAChENKO OLEG FEDOROVICh / USATENKO TAT'YaNA VASIL'EVNA / LUChKIN NIKOLAJ SERGEEVICh / BURLYaEVA EVGENIYa GRIGOR'EVNA / ZhITNIK NADEZhDA ALEKSANDROVNA / GORBAChENKO VALENTINA DANILOVNA
Helianthus annuus L. · Sunflower
Shepilov Borys Petrovych, Popova Ol`ha Andriivna, Petrenkova Vira Oleksandrovych, Veselyi Vitalii Oleksandrovych, Kuz`myshena Nadiia Viktorovna, Syvenko Valentyna Ivanivna, Alad`ina Zoia Kyrylivna, Makliak Kateryna Mykolaivna, Kyrychenko Viktor Vasylovych