Roxabel
ActiveSolanum lycopersicum L. · Tomato
Syngenta Crop Protection AG
NL
4 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.
Rozy
ActiveSolanum lycopersicum L. · Tomato
HAZERA SEEDS BV
ES
2 records
Roznari
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Roundita
ActiveSolanum lycopersicum L. · Tomato
Monsanto Vegetable IP Management B.V.
NL
3 records
Rokselana
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
SESVANDERHAVE N.V./S.A.
PL
2 records
Rodolita
ActiveSolanum lycopersicum L. · Tomato
HAZERA SEEDS BV
ES
3 records
Rotra rvp
TerminatedTrifolium pratense L. · Red clover
ILVO-PLANT 39
BE
2 records
Roseval
ActiveSolanum tuberosum L. · Potato
Federation des Syndicats Bretons (FR)
FR
2 records
Robinux
TerminatedSolanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
NL
2 records
Rosannax
ActiveSolanum lycopersicum L. · Tomato
Axia Vegetable Seeds B.V.
NL
3 records
Rolsema
ActiveRaphanus sativus L. var. oleiformis Pers. · Oil radish
PRZEDSIęBIORSTWO NASIENNE "ROLNAS" SP. Z O.O.
PL
3 records
Rocasol
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Rodelinda
ActiveSolanum lycopersicum L. var. lycopersicum · Tomato
NIRIT SEEDS
IT
2 records
Rigonda
ActiveSolanum tuberosum L. · Potato
APP Agroresursu un ekonomikas institūts
LV
3 records
Robusta
ActiveCitrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
INTERSEMILLAS SAU
ES
2 records
Riesling
ActiveSolanum lycopersicum L. · Tomato
Vilmorin-Mikado S.A.S.
FR
4 records
Ricosol
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
3 records
Rinska
ActiveCapsicum annuum L. · Bell pepper
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
2 records
Revelation
ActiveCitrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
UNITED GENETICS SEEDS CO
PT
3 records
Rêva
ActiveSolanum lycopersicum L. · Tomato
Vilmorin SA (FR)
FR
2 records
Ricciolo
ActiveSolanum lycopersicum L. · Tomato
UNITED GENETICS SEEDS CO
PT
2 records
Resolute
ActiveSolanum lycopersicum L. · Tomato
Bejo Zaden B.V.
NL
3 records
Rosende
ActiveSolanum lycopersicum L. · Tomato
INTERSEMILLAS SAU
ES
2 records
Rosemara
ActiveSolanum tuberosum L. · Potato
Aardappelkweekbedrijf J. Darwinkel V.O.F./Agricrop, Mr. John C. Mara
NL
3 records