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
Dr. R.J.Mansholt's Veredelingsbedrijf
Solanum tuberosum L. · Potato
C.J.J. Laan, A.S.J. Laan,
Solanum lycopersicum L. · Tomato
Hazera, NL
Solanum lycopersicum L. · Tomato
Syngenta, NL
Solanum tuberosum L. · Potato
Lars Naested
Glycine max (L.) Merr. · Soybean
Sylvain Legay
Solanum lycopersicum L. · Tomato
Monsanto Vegetable Management, NL
Solanum tuberosum L. · Potato
IPR BV
Solanum tuberosum L. · Potato
Germicopa Breeding
Prunus L. · Plum
Solanum lycopersicum L. · Tomato
Katarzyna Grabka
Solanum tuberosum L. · Potato
YaShINA IZOL'DA MAKSIMOVNA / SIMAKOV EVGENIJ ALEKSEEVICh / PISAREV BORIS ANATOL'EVICh / APShEV HUSEJN HAMIDOVICh
Solanum lycopersicum L. · Tomato
Syngenta Seeds, NL
Solanum tuberosum L. · Potato
HESELMANS GUUS
Hordeum vulgare L. · Barley
KWS Lochow
Solanum tuberosum L. · Potato
UNIPLANTA SAATZUCHT KG
Solanum lycopersicum L. · Tomato
Syngenta Seeds, NL
Sinapis alba L. · White mustard
RAGT 2n
Raphanus sativus L. var. oleiformis Pers. · Oil radish
P.H PETERSEN
Sinapis alba L. · White mustard
Lammers Seed Options B.V.
Solanum tuberosum L. · Potato
SAATZUCHT FRITZ LANGE KG
Sinapis alba L. · White mustard
VANDINTER SEMO B.V.
Solanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
Medicago sativa L. · Alfalfa
Florimond Desprez Veuve et Fils, FR