Ontario ISK

Withdrawn

Prunus domestica L. European plum · Fruit crops · bred by Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

also searched as: онтарио иск

Variety description

10 August 2026

The tree is medium-sized, forming a spherical, flattened crown with long branches. The ripening period occurs from mid-July to August. The variety is characterized by high winter hardiness, but it can be susceptible to bacterial canker and plum fruit moth infestation.

Fruits weighing 35–55 g have a round-oval shape. The skin is green-yellow, becoming golden upon full ripening, covered with white subcutaneous dots and a light bloom. The flesh is yellow, juicy, sweet, and the stone is partially freestone. The variety is primarily intended for dessert use.

Data on the pollination type are contradictory: some sources indicate the variety as self-fertile, while others indicate it as requiring the presence of pollinators, such as Renkloda Ulena, Stanley, or Węgierka Zwykła.

Sources8

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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.

IS FI NO SE EE IE GB DK LV LT NL DE PL BY PT ES FR BE CZ SK UA RU LU CH AT HU MD IT SI HR RS RO MT GR BG CY

no record

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

Parties

Breeder: Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniazka 456 Developed the variety
Applicant: Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniazka 456 Submitted the application to the register
Maintainer: Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniazka 456 Responsible for variety maintenance

Admission to trade

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

PL Poland Withdrawn

№ SR S274

Application

21 March 1991

Terminated

25 January 1996

Registry	Number	Application	Registration	Terminated	Status
PL Poland	SR S274	21 March 1991	—	25 January 1996	Withdrawn

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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