WS2004
TerminatedCapsicum annuum L. · Bell pepper
NL
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.
Zaroten
ActiveSolanum lycopersicum L. · Tomato
NL
2 records
Vispo
ActiveSolanum lycopersicum L. · Tomato
HU
2 records
Venezia
TerminatedSolanum lycopersicum L. · Tomato
NL
2 records
Vicere
ActiveSolanum lycopersicum L. · Tomato
HU
2 records
Vechtster
ActiveSolanum tuberosum L. · Potato
NL
3 records
Vasco
TerminatedBeta vulgaris Sugar Beet Group · Sugar beet
DE
2 records
Val Red
ActiveSolanum tuberosum L. · Potato
CZ
3 records
Valmont
Protection expiredSolanum tuberosum L. · Potato
CZ
3 records
Zeno
ActiveSolanum lycopersicum L. · Tomato
HU
2 records
UGX 8168
ActiveSolanum lycopersicum L. · Tomato
NL
2 records
UG 9233 TSW
ActiveSolanum lycopersicum L. · Tomato
NL
2 records
Tweet
ActiveSolanum lycopersicum L. · Tomato
HU
2 records
Top Marzia
TerminatedSolanum lycopersicum L. · Tomato
HU
2 records
Yolo wonder B
ActiveCapsicum annuum L. · Bell pepper
IT
2 records
Top Amit
TerminatedSolanum lycopersicum L. · Tomato
HU
2 records
Tomblack
ActiveSolanum lycopersicum L. · Tomato
HU
2 records
Tobcocktail
ActiveSolanum lycopersicum L. · Tomato
HU
2 records
Tough Boy
TerminatedSolanum lycopersicum L. · Tomato
NL
2 records
Tidig rosenpäron
ActiveSolanum tuberosum L. · Potato
SE
2 records
Tomosa
ActiveSolanum lycopersicum L. · Tomato
NL
2 records
Tobcherry
ActiveSolanum lycopersicum L. · Tomato
HU
2 records
Tidig Rosen
ActiveSolanum tuberosum L. · Potato
SE
2 records
Wasco
ActiveSolanum lycopersicum L. · Tomato
NL
2 records