Pests
Nematodes are microscopic roundworm endoparasites that feed on plant sap and cause significant yield losses. Varietal resistance is provided by genetic mechanisms that prevent pest reproduction and is assessed according to the International Seed Federation scale.
Mentioned in descriptions 13 637 varieties reference book.
Nematodes are microscopic roundworms ranging from 0.3 to 2 mm in size that act as obligate plant parasites. Most species penetrate root, stem, or bulb tissues, causing growth inhibition, wilting, and patchy crop development, with tissue damage often facilitating secondary infections.
Varietal resistance to nematodes is based on the plant's genetic apparatus, including specific R-genes that limit the feeding or reproduction of the pest. In some cases, protection is provided by a hypersensitive response, where local cell death occurs at the site of infection.
Protection efficacy is evaluated using International Seed Federation codes: HR denotes high resistance with limited parasite development under high inoculum pressure, while IR indicates intermediate resistance. The level of protection is race-specific and depends on the specific species and pathotype of the nematode.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Solanum tuberosum L. · Potato
AIDE TSAHKNA 50% / TERJE TÄHTJÄRV 50 % /
Solanum tuberosum L. · Potato
Interseed Potatoes GmbH
Solanum tuberosum L. · Potato
Pomorsko Mazurska Hodowla Ziemniaka Sp.z o.o. z siedziba w Strzekecinie
Solanum lycopersicum L. · Tomato
UNITED GENETICS SEEDS CO
Beta vulgaris Sugar Beet Group · Sugar beet
KUTNOWSKA HODOWLA BURAKA CUKROWEGO Sp.z o.o.
Solanum tuberosum L. · Potato
Andelskartoffelmelsfabrikken Vendsyssel A.m.b.A. (AKV Langholt A.m.b.A.)
Solanum lycopersicum L. var. lycopersicum · Tomato
ISI SEMENTI SPA
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
Solanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Solanum lycopersicum L. · Tomato
PETOSEED CO
Solanum lycopersicum L. · Tomato
Daniela G. Ganeva, Galina T. Pevicharova, Dimitrina P. Kostova, Olga A. Georgieva, Vinelina P. Yankova-Mihaylova, Ivanka P. Nikolova
Brassica juncea (L.) Czern. · Brown mustard
CREA- CENTRO DI RICERCA CEREALICOLTURA E COLTURE INDUSTRIALI (CREA-CI)
Solanum tuberosum L. · Potato
HZPC Holland B.V.
Solanum tuberosum L. · Potato
Germicopa Breeding
Solanum lycopersicum L. · Tomato
HEINZSEED
Solanum lycopersicum L. · Tomato
HEINZSEED
Solanum tuberosum L. · Potato
Karsten Ellenberg
Solanum tuberosum L. · Potato
Gunta Bebre
Solanum lycopersicum L. · Tomato
HAZERA SEEDS BV
Capsicum annuum L. · Bell pepper
Vilmorin-Mikado SAS (FR)
Solanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
HEINZSEED