Orion SWR
ActiveSolanum lycopersicum L. · Tomato
HU
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.
Polat
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
DE
2 records
Rocket
ActiveSolanum torvum Sw. · Turkey berry
HU
2 records
Robusta MC
Protection expiredSolanum tuberosum L. · Potato
RO
2 records
Ronemo
TerminatedSolanum lycopersicum L. · Tomato
NL
2 records
Ricciuto
ActiveSolanum lycopersicum L. · Tomato
HU
2 records
Rio Oro
ActiveSolanum lycopersicum L. · Tomato
NL
2 records
Rhinema
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
DE
2 records
PR58N57
ActiveMedicago sativa L. · Alfalfa
IT
3 records
Portento
ActiveSolanum lycopersicum L. · Tomato
NL
3 records
Red setter
TerminatedSolanum lycopersicum L. · Tomato
IT
2 records
NX D 61
ActiveSorghum bicolor (L.) Moench · Sorghum
DE
3 records
Red Haky
ActiveSolanum lycopersicum L. · Tomato
HU
2 records
Reddy
ActiveSolanum lycopersicum L. · Tomato
HU
2 records
Panama
ActiveCucurbita maxima Duchesne x Cucurbita moschata Duchesne
HU
2 records
Rambo
ActiveSolanum lycopersicum L. · Tomato
NL
2 records
Přemysl
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
CZ
2 records
Oryzella
Protection expiredOryza sativa L. · Rice
HU
2 records
Mokka
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
DK
2 records
Plasettie
ActiveSolanum tuberosum L. · Potato
NL
3 records
Oskava
ActiveSolanum tuberosum L. · Potato
CZ
4 records
Miguelona
ActiveSolanum lycopersicum L. · Tomato
HU
2 records
Picolino
ActiveSolanum lycopersicum L. · Tomato
NL
2 records
Nomdimba
TerminatedSolanum lycopersicum L. · Tomato
NL
2 records