PR 63 A 90
ActiveHelianthus annuus L. · Sunflower
Soper, John
Helianthus annuus L. Sunflower · Agricultural · bred by Syngenta Participations AG| CH
also searched as: си честер
10 August 2026
The hybrid belongs to the early-maturing group with a growing season of 105–115 days. Plant height is 150–170 cm. The plant is characterized by a moderately intensive adaptation type and good lodging resistance.
Seeds contain 52–54% oil. The hybrid possesses high genetic resistance to broomrape races A–G, as well as tolerance to Phomopsis, Phoma, Sclerotinia, and downy mildew. Recommended for cultivation in Steppe and Forest-Steppe zones using conventional technology or SU technology.
6 jurisdictions
Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.
Variety registered as early as 1 jurisdiction, data for which we do not publish: their registry licenses have not yet been verified. This section will be available upon verification.
The variety is listed in the national registry — its seeds are authorized for sale in this country.
№ 217731
№ 70503
№ 17002
№ 17039008
№ 018463_A 018463
№ 4061574
Records are sourced from official registry publications. Data sources and legal status
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Syngenta Crop Protection AG, CH
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Syngenta Participations AG
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Syngenta Participations AG c/o Syngenta International AG
Nearby in the species list SY Cargo, SY Caruso, SY Casablanca, SY CASPIRA, SY Cassini, SY Celesto, SY Centuri CLP, SY Century CLP, SY Cesario, SY Chelsea CLP, SY Chronos, SY Constanza, SY Contact, SY Cooper CLP, SY Corado, SY Corsica AR, SY Dafnis, SY Dali, SY Damasco, SY Dar Vin CLP