Nyostar
ActiveCapsicum annuum L. · Bell pepper
Vilmorin-Mikado SAS (FR)
FR
3 records
Pests
Nematodes
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.
Breakdown by crop
Root-knot nematodes of tomato
1 711
Potato nematodes
1 231
Nematodes of sugar beet
287
Pepper Nematodes
154
Nematodes — Oilseed radish
143
Nematodes in white mustard
105
Nematodes — Tomato (Interspecific Hybrids)
79
Alfalfa nematodes
62
Barley nematodes
55
Root-knot nematodes of tomato
49
Soybean cyst nematode
35
Grapevine Nematodes
32
Plum nematodes
24
Peach nematodes
22
Rice nematodes
22
Nematodes in black oat
21
Nematodes of oats
20
Citrus Nematode
19
Nematodes — Prunus amygdalus x Prunus persica
16
Nematodes of White Clover
15
Nematodes in Prunus davidiana × Prunus persica hybrids
14
Nematodes — Solanum torvum Sw.
14
Nematodes — common wheat
14
Nematodes — hybrids between Citrus x aurantium L. x Citrus trifoliata L.
13
Found in these crops
Varieties that feature this in their description
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.
Nikomate
ActiveSolanum lycopersicum L. · Tomato
HAZERA SEEDS BV
ES
3 records
Numbat
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
SESVanderhave NV
NL
2 records
Orzu
ActiveCucumis sativus L. · Cucumber
Nunhems B.V.
NL
2 records
Nevena
ActiveSolanum tuberosum L. · Potato
Vesa Velhartice a.s.
CZ
3 records
Nesmet
ActiveCapsicum annuum L. · Bell pepper
HM.Clause S.A.S.
FR
2 records
Oriental Rise
ActiveSolanum lycopersicum L. · Tomato
Sakata Seed Corporation (SCC)
FR
3 records
Oriental Magic
ActiveSolanum lycopersicum L. · Tomato
Sakata Seed Corporation (SCC)
FR
3 records
Orfey
ActiveSolanum tuberosum L. · Potato
Emiliya K. Nacheva, Valentina P. Petkova, Galina T. Pevicharova, Hari Ya. Samaliev
BG
3 records
Olmedo
ActiveSolanum lycopersicum L. · Tomato
Vilmorin-Mikado S.A.S.
FR
3 records
Nemalite
ActiveCapsicum annuum L. · Bell pepper
Enza Zaden Beheer B.V.
NL
3 records
Oranjestar
ActiveSolanum lycopersicum L. · Tomato
Sakata Seed Corporation, JP
FR
2 records
Nöstling
ActiveSolanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
AT
4 records
Neo
Application submittedHordeum vulgare L. · Barley
InterGrain Pty Ltd
ES
2 records
Natyssa
TerminatedSolanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
FR
2 records
Ocelot
ActiveCapsicum annuum L. · Bell pepper
Enza Zaden Beheer B.V.
NL
2 records
Numenor
Application submittedCapsicum annuum L. · Bell pepper
Vilmorin-Mikado SAS (FR)
FR
2 records
OAC Bruno
ActiveGlycine max (L.) Merr. · Soybean
Istvan Rajkan
UA
3 records
Nyra
ActiveSolanum lycopersicum L. · Tomato
Erma Zaden (IL)
BG
2 records
Ntama
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
N 6404
ActiveSolanum lycopersicum L. · Tomato
Nunhems B.V.
NL
3 records
MYROBALAN_GF_31
Activehybrids between Prunus davidiana and Prunus persica
ES
2 records
Neron
ActiveSolanum torvum Sw. · Turkey berry
SEMILLEROS SALIPLANT, SL
ES
2 records
Myla
ActiveSolanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
NL
3 records