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8N421cldm

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Helianthus annuus L. Sunflower · Agricultural · bred by Steve Thompson

also searched as: 8н421клдм

Variety description

10 August 2026

The hybrid belongs to the NuSun type, which means mid-oleic oil quality. The CLDM designation indicates technological resistance to Clearfield system herbicides and genetic resistance to downy mildew.

Plants reach a height of about 195–200 cm. Under field conditions, the hybrid may show susceptibility to certain races of sunflower rust and broomrape; herbicide treatment is applied to control the latter.

Sources6
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Countries of admission

4 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.

QM

terminated no record

Variety in registries Regions of admission, rights holders, and status of plant breeders' rights

Parties

Breeder
Steve Thompson 44 Developed the variety
Applicant
Dow AgroSciences Vertriebsgesellschaft m.b.H., AT 16 Submitted the application to the register
Rights holder
Dow AgroSciences V.m.b.H. 74 Holds the rights to the variety
Maintainer
PT - DOW AGROSCIENCES VERTRIEBSGMBH Responsible for variety maintenance

Admission to trade

The variety is listed in the national registry — its seeds are authorized for sale in this country.

  • PT Portugal Withdrawn

    № 11025

  • QZ European Union Terminated

    № 214593

    Registration
    29 January 2013
    Terminated
    31 December 2019
  • UA Ukraine Terminated

    № 09017263

    Application
    19 November 2009
    Terminated
    14 January 2022
  • SK Slovak Republic Withdrawn

    № 210R092

    Application
    2 December 2009
    Terminated
    4 April 2012

Plant breeders' rights

The right is granted for a limited term: propagation of the variety requires a license from the rights holder.

Ukraine № 09017263
Terminated
  1. Application filed 19 November 2009
  2. Registered
  3. Entry closed 14 January 2022

Records are sourced from official registry publications. Data sources and legal status

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This is a directory, not an official registry: data is based on public disclosures and may have changed. More about sources

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Nearby in the species list 8Kh463KL, 8Kh540KP, 8Kh581KLDM, 8M EXP1, 8M EXP2, 8N270CLDM, 8n337dm, 8N358cl, 8N358CLDM, 8N358CPDM, 8n453dm, 8N560CL, 8P EXP11, 8P EXP12, 8P EXP14, 8S461dm, 9, 9 B, 90 C 25 R, 90000016

Discussion: 8N421cldm

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