Unigold
ActiveCapsicum annuum L. · Bell pepper
UNITED GENETICS SEEDS CO
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.
Uladar
ActiveSolanum tuberosum L. · Potato
RUP «NAUCHNO - PRAKTICHESKIJ CZENTR NACZIONALNOJ AKADEMII NAUK BELARUSI PO KARTOFELEVODSTVU I PLODOOVOSHHEVODSTVU»
UA
4 records
UG 812
ActiveSolanum lycopersicum L. · Tomato
NL
4 records
Valinor
ActiveSolanum lycopersicum L. · Tomato
Syngenta Crop Protection AG
NL
5 records
TyPrince
ActiveSolanum lycopersicum L. · Tomato
United Genetics, I
PT
3 records
Vieri
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Valouro
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Trovador
ActiveCapsicum annuum L. · Bell pepper
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
5 records
Troy
ActiveSolanum lycopersicum L. · Tomato
SAKATA SEED AMERICA INC US
FR
3 records
Trinita
TerminatedBeta vulgaris Sugar Beet Group · Sugar beet
SYNGENTA WINTER OILSEED AB
ES
3 records
Trio
ActiveEruca vesicaria (L.) Cav. subsp. sativa (Mill.) Thell. · Arugula
J. Joordens Zaadhandel B.V.
DE
3 records
Uschi
TerminatedHordeum vulgare L. · Barley
LAUBACH| NORDSAAT Saatzucht GmbH Herrn Dr. Eberhard Laubach - Zuchtstation Gudow -
DE
4 records
Touareg
ActiveSolanum tuberosum L. · Potato
Station de Recherche du Comité Nord G.I.E.
FR
4 records
Toccata
TerminatedSolanum tuberosum L. · Potato
JACOBS REINHOLD
DE
4 records
Triton
ActiveSolanum tuberosum L. · Potato
NORIKA Nordring-Kartoffelzucht-und Vermehrungs-GmbH Gross Luesewitz
DE
4 records
Tinca
ActiveSolanum tuberosum L. · Potato
Danespo A/S
DK
4 records
Tontelle
ActiveSolanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
NL
5 records
Tirian
Application submittedhybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Trambellino
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
5 records
Trabant
ActiveSolanum tuberosum L. · Potato
Niederösterreichische Saatbaugenossenschaft reg.Gen.m.b.H.
AT
5 records
Thor
ActiveSolanum tuberosum L. · Potato
Landbrugets Kartoffelfond
DK
4 records
Theresa
ActiveSolanum tuberosum L. · Potato
HOFFERBERT| Dr. Hans-Reinhard Hofferbert
DE
8 records
Thalessa
ActiveSolanum tuberosum L. · Potato
Heinrich Böhm
NL
6 records
Theda
ActiveSolanum tuberosum L. · Potato
Europlant Innovation GmbH & Co. KG
DE
5 records