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
Pomorsko Mazurska Hodowla Ziemniaka Sp.z o.o. z siedziba w Strzekecinie
Solanum tuberosum L. · Potato
OSIPChUK ANDREJ ANTONOVICh / NAZAR STEFANIYa GRIGOR'EVNA / GRITSENKO EKATERINA PETROVNA / KUChKO ANATOLIJ ANDREEVICh / OSIPChUK ALLA ANDREEVNA / TIMOShENKO TAT'YaNA VASIL'EVNA / TARASENKO OLEG ALEKSANDROVICh / TAKTAEV BORIS ANATOL'EVICh / TARAShchENKO NAD
Solanum tuberosum L. · Potato
Sloots Aardappelkweekbedrijf B.V.
Solanum tuberosum L. · Potato
Selekta Pacov, a.s., CZ
Solanum torvum Sw. · Turkey berry
CAMPOCCIA GIOMBATTISTA
Solanum lycopersicum L. · Tomato
UNITED GENETICS SEEDS CO
Zea mays L. subsp. mays (Maize Group) · Maize
MC.NAIR SEED CO.
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Vilmorin-Mikado S.A.S.
Capsicum annuum L. · Bell pepper
Enza Zaden Beheer B.V.
Solanum lycopersicum L. · Tomato
VANDERLEI VARISI
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum tuberosum L. · Potato
BRETAGNE PLANTS INNOVATION S.A.S.
Solanum lycopersicum L. · Tomato
UNITED GENETICS SEEDS CO
Solanum lycopersicum L. · Tomato
ESASEM SPA. Via G. Marconi, 56 37052- Casaleone (VR), Italy
Solanum lycopersicum L. · Tomato
SAKATA SEED AMERICA INC US
Glycine max (L.) Merr. · Soybean
Sevita Genetics
Solanum lycopersicum L. · Tomato
SEMILLAS FITO, S.A.
Solanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
Solanum lycopersicum L. · Tomato
Sakata Seed Corporation, JP
Solanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
Solanum tuberosum L. · Potato
Hergen Berding
Solanum tuberosum L. · Potato
IPR B.V.
Solanum lycopersicum L. · Tomato
INCONNU (FR)