Diseases
Helianthus annuus L.
A fungal disease of sunflower caused by a complex of imperfect fungi of the genus Alternaria, characterized by the infection of all above-ground plant organs throughout the growing season.
In the reference 61 varieties crop Sunflower, where this is mentioned in the description.
The primary pathogen of the disease is the specialized species Alternaria helianthi, although the pathogenic complex also includes the species Alternaria alternata, A. tenuissima, A. helianthiinficiens, A. zinniae, A. arborescens, and species of the A. infectoria group. The disease manifests on cotyledons as round yellow spots, on leaves as spotting with a yellow halo leading to necrosis, and on stems and flower heads in the form of dark streaks and spots, which disrupt seed nutrition.
In humid conditions, a characteristic olive-velvety bloom of fungal sporulation develops on the affected areas. Specific monogenic loci for resistance to the pathogen have not been identified in the crop; therefore, breeding for immunity is based primarily on interspecific hybridization methods with wild Helianthus species to achieve field resistance.
General information about the subject — on the page Alternaria blight.
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
Euralis Semences FR
Helianthus annuus L. · Sunflower
Limagrain Europe SA (FR)
Helianthus annuus L. · Sunflower
Verneuil Recherche SA (FR)
Helianthus annuus L. · Sunflower
Lidea France SAS, F
Helianthus annuus L. · Sunflower
MAY AGRO SEED COPR.
Helianthus annuus L. · Sunflower
SC Quality Crops Genetics SRL
Helianthus annuus L. · Sunflower
Institut za ratarstvo i povrtarstvo, Novi Sad
Helianthus annuus L. · Sunflower
Galin Georgiev Georgiev
Helianthus annuus L. · Sunflower
RAGT 2N S.A.S
Helianthus annuus L. · Sunflower
Jean Pierre Dufourcq
Helianthus annuus L. · Sunflower
Euralis Semences
Helianthus annuus L. · Sunflower
HAO-DEMETER Cotton and Industrial Crops Institute
Helianthus annuus L. · Sunflower
CST(CLUB SELECT.TOURNESOL
Helianthus annuus L. · Sunflower
PARIJ YaROSLAV FEDOROVICh / PARIJ MIROSLAV FEDOROVICh / ZOLOTAREV KONSTANTIN MITROFANOVICh / YaKOVENKO ANATOLIJ ALEKSANDROVICh
Helianthus annuus L. · Sunflower
Institut za ratarstvo i povrtarstvo, Novi Sad
Helianthus annuus L. · Sunflower
SANDRA CVEJIC / SINISA JOCIC / GORAN MALIDZA / DRAGANA MILADINOVIC / VLADIMIR MIKLIC / NENAD DUSANIC
Helianthus annuus L. · Sunflower
Yalcin Kaya, Tahir Gucer, Ibrahim Yilmaz, Veli Pekcan, Goksel Evci,
Helianthus annuus L. · Sunflower
Dusanic Nenad, Gvozdenovic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Radic Velimir, Gvozdenovic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
Miklic Vladimir, Dusanic Nenad, Malidza Goran, Cvejic Sandra, Jocic Sinisa,
Helianthus annuus L. · Sunflower
prof.Nina Nenova
Helianthus annuus L. · Sunflower
INTERDOR IBERICA, S.L.
Helianthus annuus L. · Sunflower
EURALIS GENETIQUE
Helianthus annuus L. · Sunflower
Poljoprivredni Institut Osijek, HR