Aziya
ActiveSolanum lycopersicum L. · Tomato
Yuksel Tohumculuk LTD
UA
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.
Arquimedes
ActiveCapsicum annuum L. · Bell pepper
Vilmorin-Mikado SAS (FR)
FR
2 records
Aryza
ActiveSolanum lycopersicum L. · Tomato
SEMILLAS FITO, S.A.
ES
2 records
Armour
Application submittedhybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Syngenta Crop Protection AG
NL
3 records
Aramis
ActiveSolanum tuberosum L. · Potato
Pomorsko Mazurska Hodowla Ziemniaka Sp.z o.o. z siedziba w Strzekecinie
PL
2 records
Anissia
ActiveSolanum lycopersicum L. · Tomato
HM.Clause S.A.S.
FR
3 records
Aurantino
ActiveSolanum lycopersicum L. · Tomato
UNITED GENETICS SEEDS CO
PT
2 records
Apolena
TerminatedSolanum tuberosum L. · Potato
Vysočina Vyklantice, a.s. (CZ)/Výzkumný ústav bramborářský Havlíčkův Brod, s.r.o. (CZ)
CZ
3 records
Atyliade
ActiveSolanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
FR
2 records
Attrio
ActiveSolanum lycopersicum L. · Tomato
Nunhems B.V.
NL
4 records
Antora
ActiveSolanum tuberosum L. · Potato
Averis Seeds B.V.
NL
4 records
Araxi
ActiveSolanum lycopersicum L. · Tomato
Axia Vegetable Seeds B.V.
NL
3 records
Annico
ActiveSolanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
NL
4 records
Annabell
TerminatedSolanum tuberosum L. · Potato
P Y VAN DER WERFF/DE ZPC
FR
4 records
Amaiary
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
3 records
Anemon
TerminatedSolanum lycopersicum L. · Tomato
YISSUM, Research Development Company of the Hebrew University of Jerusalem
NL
5 records
Alvalade
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Arwis
TerminatedSinapis alba L. · White mustard
K. H. Święciccy, Alicja Ramenda
PL
3 records
Arwad
ActiveCapsicum annuum L. · Bell pepper
Bakker Brothers Gebroeders Bakker Zaadteelt en Zaadhandel BV
PL
2 records
Apeticio
ActiveSolanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
FR
3 records
Annarozay
ActiveSolanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
NL
2 records
Armira
ActiveSolanum lycopersicum L. · Tomato
Krasimira Nikolova Georgieva
BG
3 records
Amantyno
ActiveSolanum lycopersicum L. · Tomato
Gautier Semences SAS (FR)
FR
3 records
Annadark
ActiveSolanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
NL
2 records