ViruTherm-1

Active

Pyrus communis L. European pear · Fruit crops

also searched as: вирутерм 1

Variety description

10 August 2026

The ViruTherm-1 rootstock belongs to the species Pyrus x michauxii and is intended for use in commercial and amateur horticulture as a base upon which pear fruit varieties are grafted. The primary goal of its creation was to ensure resistance to pear wilt caused by phytoplasma.

Plants on this rootstock exhibit a growth vigor 20–30% lower than those on seedling rootstocks. The root system is characterized as well-developed, fine, and fibrous. The rootstock is suitable for cultivation on dry, sandy, and gravelly soils, demonstrating tolerance to high lime content and the ability to grow in acidic soils with a pH down to 5.5.

Among the agronomic traits, it is noted for the absence of chlorosis caused by soil pH levels, as well as high winter hardiness down to -20°C and resistance to high temperatures. The rootstock demonstrates good compatibility with all tested pear varieties.

Sources6

Loading…

The list of sources is loaded via script—please enable JavaScript.

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

Applicant: VIRUTERM Submitted the application to the register

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

Found an error in the record?

The directory replicates the primary source. If an entry differs from the official publication, please specify the discrepancy and provide a link if possible. Corrections are added to the moderation queue.

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

Same species