The plant belongs to the butterhead type and forms a head. The variety was bred for cultivation in field conditions, where it demonstrated resistance to specific diseases and physiological disorders.
The variety possesses pronounced resistance to powdery mildew. In studies from the 1970s, its high resistance to tipburn was confirmed. At present, the variety is considered an heirloom and is maintained primarily in seed collections for home gardening.
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Countries of admission
1 jurisdiction
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data for which we do not publish: their registry licenses have not yet been verified.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.
Also known as
breeder code AVONDEFIANCE
A single variety may be registered in different countries under different names. All records are consolidated into one profile based on the breeder's code—an internal number that is identical for the variety across all registries.
AVON DEFIANCEprimaryFR
AvondefianceFR, GB, QZ
The primary name shown is the one under which the variety is registered in the largest number of jurisdictions. Search finds the variety by any of its names.
Variety in registries
Regions of admission, rights holders, and status of plant breeders' rights
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