UGI 1796
ActiveSolanum lycopersicum L. · Tomato
UNITED GENETICS ITALIA S.P.A
PT
2 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.
Tiobelle
Application submittedFragaria x ananassa Duchesne ex Rozier · Garden strawberry
ARC Infruitec (ZA)
FR
2 records
Tifon
ActiveSolanum lycopersicum L. · Tomato
SEMILLAS ALMERIA I+D,S.L.
ES
2 records
UG 17219
ActiveSolanum lycopersicum L. · Tomato
UNITED GENETICS SEEDS CO
PT
2 records
UG 13577
ActiveSolanum lycopersicum L. · Tomato
UNITED GENETICS SEEDS CO
PT
2 records
Theracan
Application submittedSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
3 records
Tisey
ActiveSolanum lycopersicum L. · Tomato
Bayer Holland B.V.
NL
5 records
Trabuco
Application submittedCapsicum annuum L. · Bell pepper
ALEJANDRO MARTIN CARA
ES
2 records
Terranova
ActiveCapsicum annuum L. · Bell pepper
Syngenta Crop Protection AG
NL
4 records
Truvatura
ActiveSolanum lycopersicum L. · Tomato
Vilmorin-Mikado S.A.S.
FR
3 records
Themis
ActiveSolanum tuberosum L. · Potato
SIPRE (FR)
FR
3 records
Tomapie
Activehybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
INTERSEMILLAS SAU
ES
2 records
TROLL
TerminatedTriticum aestivum L. · Bread wheat
W WEIBULL
DK
4 records
Tokai
ActiveSolanum tuberosum L. · Potato
Danespo A/S
DK
4 records
Terapur
ActiveDaucus carota L. · Carrot
Vilmorin-Mikado S.A.S.
FR
3 records
Tayrone
Application submittedSolanum lycopersicum L. · Tomato
Nunhems Netherlands B.V.
NL
3 records
Tirrenico
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
FR
3 records
Tastyno
ActiveSolanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
FR
2 records
Tenaz
ActiveSolanum lycopersicum L. · Tomato
NEZZALEZ, S.L.
ES
2 records
Tasti Lee
ActiveSolanum lycopersicum L. · Tomato
Bejo Zaden B.V.
NL
3 records
Tovi Star
ActiveSolanum lycopersicum L. · Tomato
ZERAIM GEDERA
ES
2 records
Talent
ActiveSolanum lycopersicum L. · Tomato
Ballardini Massimiliano
UA
2 records
Tafury
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Szyper
ActiveSolanum tuberosum L. · Potato
Pomorsko Mazurska Hodowla Ziemniaka Sp.z o.o. z siedziba w Strzekecinie
PL
3 records