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
LIMAGRAIN GENETICS GRANDES CULTURES S.A.
Helianthus annuus L. · Sunflower
Kryvosheieva Olena Vatslavivna, Shepilov Borys Petrovych, Popova Ol`ha Andriivna, Veselyi Vitalii Oleksandrovych, Kuzmyshena Nadiia Viktorivna, Syvenko Valentyna Ivanivna, Makliak Kateryna Mykolaivna, Alad`ina Zoia Kyrylivna, Kyrychenko Viktor Vasylovych,
Helianthus annuus L. · Sunflower
Dobroudja Agricultural Institute - General Toshevo (BG)
Helianthus annuus L. · Sunflower
ASGROW SEED COMPANY
Helianthus annuus L. · Sunflower
AGRA SEED RESEARCH INTERN
Helianthus annuus L. · Sunflower
Skakunenko, Vladyslava
Helianthus annuus L. · Sunflower
RAGT 2N S.A.S
Helianthus annuus L. · Sunflower
Petъr Yvanov Yvanov
Helianthus annuus L. · Sunflower
Rustica Prograin Genetique SA (FR)/Institute of Field & Vegetable Crops (RS)
Helianthus annuus L. · Sunflower
Syngenta Crop Protection AG, CH
Helianthus annuus L. · Sunflower
MUHINA ZhANNA MIHAJLOVNA / VASIL'EV ANDREJ VLADIMIROVICh
Helianthus annuus L. · Sunflower
AGROMAR MARMARA TARIM ÜRÜNLERI SAN VE TIC. A.S.
Helianthus annuus L. · Sunflower
Dusanic Nenad, Miklik Vladimir, Malida Goran, Jocic Sinisa,
Helianthus annuus L. · Sunflower
MAS SEEDS
Helianthus annuus L. · Sunflower
JOSE RAMON PEREZ MONREAL
Helianthus annuus L. · Sunflower
Luk'ianchyk IUrii Ivanovych, Karpenko Oleksandr Oleksandrovych, Parii IUliia Oleksandrivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych, Parii Fedir Mykytovych,
Helianthus annuus L. · Sunflower
Yanul` Viktor Pavlovych, Baian Ezhefne, Synysha Iotsych, Drahan Shkorych,
Helianthus annuus L. · Sunflower
Kyrychenko Maryna Serhiivna, Babych Viktoriia Olehivna, Parii Myroslav Fedorovych, Parii IAroslav Fedorovych,
Helianthus annuus L. · Sunflower
Parii Anna Fedorivna, Parii Myroslav Fedorovych, 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
Y. Encheva, Y. Stoyanova, M. Hristov, N. Nenov, P. Ivanov, L. Nikolova, P. Petrov, D. Petakov, V. Velkov, V. Encheva-Vasileva, P. Shindrova
Helianthus annuus L. · Sunflower
INIA-OTRI
Helianthus annuus L. · Sunflower
SEMILLAS BATLLE S.A.
Helianthus annuus L. · Sunflower