Universa
ActiveSolanum tuberosum L. · Potato
CECAB (FR)/Bretagne-plants (FR)
FR
6 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.
Tizia
ActiveSolanum tuberosum L. · Potato
KARTOFFELZUCHT BOHM INH. GEBR. BOHM KG
DE
5 records
Travis
ActiveSolanum tuberosum L. · Potato
Interseed Potatoes GmbH
DE
5 records
Taja
ActiveOnobrychis viciifolia Scop. · Common sainfoin
MHR SEEDS LIMITED
PL
4 records
Ternetto
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
6 records
Surya
ActiveSolanum tuberosum L. · Potato
Station de Recherche du Comité Nord G.I.E.
FR
7 records
Swift
ActiveSolanum tuberosum L. · Potato
Jack Dunnett
NL
8 records
Sweetelle
ActiveSolanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
NL
6 records
Sunny
ActiveSinapis alba L. · White mustard
P.H PETERSEN
DE
4 records
Sunday
ActiveRaphanus sativus L. var. oleiformis Pers. · Oil radish
PHP PETERSEN
DE
4 records
Stormram
Application submittedSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
5 records
Sulina
ActiveRaphanus sativus L. var. oleiformis Pers. · Oil radish
P.H PETERSEN
DE
4 records
Suletta
ActiveRaphanus sativus L. var. oleiformis Pers. · Oil radish
P.H PETERSEN
DE
4 records
Success
ActiveRaphanus sativus L. var. oleiformis Pers. · Oil radish
P.H PETERSEN
DE
4 records
Strongton
ActiveSolanum lycopersicum L. · Tomato
Nunhems B.V.
NL
4 records
Spinel
ActiveCapsicum annuum L. · Bell pepper
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
6 records
Simphony
ActiveSolanum tuberosum L. · Potato
Sloots Aardappelkweekbedrijf B.V.
NL
7 records
Sinus
ActiveSinapis alba L. · White mustard
Wilhelm Krings / Philipp Berner (+)
DE
6 records
Seychelle
ActiveSolanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
NL
7 records
Sentinel
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
SYNGENTA WINTER OILSEED AB
NL
4 records
Scapa
ActiveSolanum tuberosum L. · Potato
JAMES HUTTON LTD
NL
6 records
Sarpo Mira
ActiveSolanum tuberosum L. · Potato
SARPO KFT
DK
6 records
Signum
ActiveSolanum tuberosum L. · Potato
J.J. Schilt
NL
7 records
Saprodi
ActiveSolanum tuberosum L. · Potato
Sloots Aardappelkweekbedrijf B.V.
NL
6 records