Kariera
Protection expiredSolanum tuberosum L. · Potato
Sativa Keřkov a.s., CZ
CZ
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.
Karrera
ActiveSolanum tuberosum L. · Potato
HZPC Holland B.V.
UA
2 records
Kizomba
ActiveSolanum lycopersicum L. · Tomato
INTERSEMILLAS SAU
ES
2 records
KAFA
ActiveSolanum lycopersicum L. · Tomato
Marcio Pais Arruda
UA
2 records
KIS Kokra
ActiveSolanum tuberosum L. · Potato
Kmetijski Inštitut Slovenije (Agricultural Institute of Slovenia)
SI
3 records
Karanfil
ActiveSolanum lycopersicum L. · Tomato
Manier Tohumculuk, TR
PL
2 records
Joker
TerminatedSolanum tuberosum L. · Potato
Landbrugets Kartoffelfond
DE
5 records
Kaptah
ActiveSolanum tuberosum L. · Potato
VANDEL POTATOES I/S
DK
2 records
Kanshin
ActiveSolanum lycopersicum L. · Tomato
Ikasido Global Group B.V (NL)
BG
3 records
King Kong
Activehybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
3 records
Kalys
ActiveSolanum tuberosum L. · Potato
BRETAGNE PLANTS INNOVATION S.A.S.
NL
4 records
Jurek
ActiveSolanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
PL
3 records
Jutrzenka
TerminatedSolanum tuberosum L. · Potato
Pomorsko Mazurska Hodowla Ziemniaka Sp.z o.o. z siedziba w Strzekecinie
PL
3 records
Jolenta KWS
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
NL
2 records
Katmandu
ActiveCapsicum annuum L. · Bell pepper
Syngenta Seeds B.V.
NL
2 records
Jogla
ActiveSolanum tuberosum L. · Potato
APP Agroresursu un ekonomikas institūts
LV
3 records
Jimena
TerminatedSolanum tuberosum L. · Potato
APPACALE, S.A.
ES
4 records
Jenise
ActiveSolanum lycopersicum L. · Tomato
HAZERA SEEDS BV
ES
2 records
Javah
ActiveSolanum melongena x Solanum torvum
TAKII EUROPE B V
NL
2 records
Jaspina
ActiveSolanum lycopersicum L. · Tomato
Graines Voltz (FR)
FR
2 records
Kantara
TerminatedSolanum tuberosum L. · Potato
KWEEKINSTITUUT KARNA
NL
4 records
Jabadu
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KUTNOWSKA HODOWLA BURAKA CUKROWEGO Sp.z o.o.
PL
2 records
Irmina
TerminatedSolanum tuberosum L. · Potato
Hodowla Ziemniaka Zamarte sp. z o.o. - Grupa IHAR
PL
3 records
Kaori
WithdrawnCapsicum annuum L. · Bell pepper
Syngenta Crop Protection AG
NL
3 records