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
Aardappelkweek- en Selectiebedrijf Ijsselmeerpolders B.V.
Solanum tuberosum L. · Potato
Aardappelkweek-en Selectiebedrijf Ijsselmeerpolders B.V.
Solanum lycopersicum L. · Tomato
Monsanto Vegetable IP Management B.V.
Raphanus sativus L. var. oleiformis Pers. · Oil radish
SAATZUCHT STEINACH GMBH and CO KG
Solanum tuberosum L. · Potato
Station Recherche du Comité Nord (GIE)
Solanum tuberosum L. · Potato
RUP «NAUCHNO - PRAKTICHESKIJ CZENTR NACZIONALNOJ AKADEMII NAUK BELARUSI PO KARTOFELEVODSTVU I PLODOOVOSHHEVODSTVU»
Solanum lycopersicum L. · Tomato
Yuksel Tohumculuk LTD
Raphanus sativus L. var. oleiformis Pers. · Oil radish
PHP PETERSEN
Sinapis alba L. · White mustard
LAMMERS SEED OPTIONS
Avena strigosa Schreb. · Black oat
Semillas Biscayart S.A.
Solanum tuberosum L. · Potato
Interseed Potatoes GmbH
Solanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
Solanum lycopersicum L. · Tomato
WESTERN SEED ESPAÑA, S.A.
Solanum lycopersicum L. · Tomato
MARTIJN VAN STEE
Solanum lycopersicum L. · Tomato
Seminis Vegetable Seeds
Solanum tuberosum L. · Potato
BERNARD KRIJGER
Medicago sativa L. · Alfalfa
PLANT GENETICS
Solanum lycopersicum L. · Tomato
Seminis Vegetable Seeds
Solanum tuberosum L. · Potato
CYGNET POTATO BREEDERS
Solanum lycopersicum L. · Tomato
Vanesa Morales Montoya, Nunhems B.V.
Solanum tuberosum L. · Potato
M HIGGINS LTD
Solanum tuberosum L. · Potato
DR. LUDWIG SIMON
Lolium multiflorum Lam. · Italian ryegrass
Euro Grass Breeding GmbH Co. KG
Solanum tuberosum L. · Potato
SARL L.S.A.