Liberty
ActiveMedicago sativa L. · Alfalfa
Gie Grass
PT
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.
Leonisher
ActiveSolanum lycopersicum L. · Tomato
Seminis Vegetable Seeds
NL
4 records
Lemon Reagan
TerminatedChrysanthemum L. · Chrysanthemum
REVECU II B.V.
NL
3 records
Kosmik
ActiveCapsicum annuum L. · Bell pepper
Enza Zaden, NL
NL
3 records
Kontur
TerminatedRaphanus sativus L. var. oleiformis Pers. · Oil radish
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG. Herrn Dr. Martin Frauen
DE
4 records
Kyra
ActiveSolanum tuberosum L. · Potato
Freerk Zwart Tuinservice & Agrarische Dienstverlening^^^Fobek B.V.
NL
5 records
Kiruna
ActiveCapsicum annuum L. · Bell pepper
Syngenta Seeds B.V.
NL
5 records
Kessie
ActiveSolanum lycopersicum L. · Tomato
Cora Seeds, I
HU
3 records
Klass
ActiveSolanum lycopersicum L. · Tomato
Seminis SVS Holland, NL
NL
3 records
Kimberlino
ActiveSolanum lycopersicum L. · Tomato
UNITED GENETICS SEEDS CO
PT
4 records
Jungle
ActiveSolanum lycopersicum L. · Tomato
Nunhems B.V.
NL
5 records
Julia
ActivePhacelia tanacetifolia Benth. · Lacy phacelia
FREUDENBERGER| Feldsaaten Freudenberger G.m.b.H. & Co. Kommanditgesellschaft
DE
4 records
Kemery
Application submittedSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Kerren
ActiveSolanum tuberosum L. · Potato
EUROPLANT Innvovation GmbH & Co. KG
DE
5 records
Katina
ActiveSinapis alba L. · White mustard
Michaela Schlathölter
DE
4 records
Isabel
TerminatedSolanum tuberosum L. · Potato
HERVE DUBREUIL_
FR
4 records
Karli
ActiveSolanum tuberosum L. · Potato
Averis Seeds B.V.
NL
3 records
Jasmina
ActiveSolanum tuberosum L. · Potato
Vesa Velhartice a.s.
CZ
4 records
Janke
ActiveSolanum tuberosum L. · Potato
Johan Martijn Kannegieter, Harm Kannegieter
NL
5 records
Kaamos
ActiveCapsicum annuum L. · Bell pepper
Syngenta Seeds B.V.
NL
3 records
Kalipro
Activehybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Vilmorin-Mikado S.A.S.
FR
4 records
Jonas
ActiveSolanum tuberosum L. · Potato
Saka Pflanzenzucht GmbH Co KG
DE
4 records
Ino
ActiveSolanum tuberosum L. · Potato
Station de Recherche du Comite Nord (FR)
FR
4 records
Izmono
ActiveSolanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
NL
6 records