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.
Capsicum annuum L. · Bell pepper
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Raphanus sativus L. var. oleiformis Pers. · Oil radish
Pietrzak sp. z o.o. sp. k.
Solanum lycopersicum L. · Tomato
UNILEVER BEST FOODS N.A.
Solanum lycopersicum L. · Tomato
Syngenta Crop Protection AG
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Solanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
Solanum lycopersicum L. · Tomato
Vilmorin SA (FR)
Solanum lycopersicum L. · Tomato
RIJK ZWAAN Z.Z. B.V.
Solanum lycopersicum L. · Tomato
PETOSEED CO
Capsicum annuum L. · Bell pepper
Syngenta Seeds B.V.
Solanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
Solanum tuberosum L. · Potato
Kmetijski Inštitut Slovenije (Agricultural Institute of Slovenia)
Capsicum annuum L. · Bell pepper
Syngenta Seeds B.V.
Solanum lycopersicum L. · Tomato
Manier Tohumculuk
Cichorium intybus L. (Industrial Chicory Group) · Chicory
Hodowla Roślin Kalinowa sp. z o.o.
Solanum lycopersicum L. · Tomato
HAZERA SEEDS BV
Cucumis melo L. · Melon
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
Solanum lycopersicum L. · Tomato
HAZERA SEEDS BV
Beta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE and CO KGAA
Brassica juncea (L.) Czern. · Brown mustard
UNIVERSITY OF IDAHO - JACK BROWN (US)
Beta vulgaris Sugar Beet Group · Sugar beet
SESVanderhave NV
Solanum tuberosum L. · Potato
ShANINA ELENA PETROVNA / KLYuKINA ELIZAVETA MATVEEVNA / ChUENKO ALEKSANDR MIHAJLOVICh / BANADYSEV SERGEJ ALEKSANDROVICh
Solanum tuberosum L. · Potato
Bavaria Saat GbR