Eliska
WithdrawnBeta vulgaris Sugar Beet Group · Sugar beet
CZ
1 record
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.
Gelb
Protection expiredStropharia rugoso-annulata Farlow ex. Murr.
HU
1 record
Hippo
WithdrawnRaphanus sativus L. var. oleiformis Pers. · Oil radish
DE
1 record
Goldneck
TerminatedCucurbita pepo L. · Field pumpkin
IT
1 record
Eracle
ActiveSolanum lycopersicum L. · Tomato
IT
1 record
Fantaziia
Application submittedSolanum tuberosum L. · Potato
UA
1 record
Èrino
ActiveSolanum lycopersicum L. · Tomato
IT
1 record
Domino
ActiveSolanum sisymbriifolium Lam. · Sticky nightshade
NL
1 record
Finish
WithdrawnAvena strigosa Schreb. · Black oat
DE
1 record
Commandor
TerminatedMedicago sativa L. subsp. sativa · Alfalfa
IT
1 record
Charger
WithdrawnSinapis alba L. · White mustard
DE
1 record
Citrina
Protection expiredTagetes tenuifolia Cav. · Signet marigold
SK
1 record
Eureka
Protection expiredFestuca rubra L. · Red fescue
CZ
1 record
Etnico
TerminatedSolanum lycopersicum L. · Tomato
IT
1 record
Fiona
ActivePhacelia congesta Hook · Blue curls
CZ
1 record
Estefano
Application submittedSolanum lycopersicum L. · Tomato
HU
1 record
Fado
Protection expiredSolanum lycopersicum L. var. lycopersicum · Tomato
HU
1 record
Carerra
WithdrawnSolanum tuberosum L. · Potato
CZ
1 record
Costate 21
TerminatedSolanum lycopersicum L. · Tomato
RO
1 record
Espina
Application submittedSolanum melongena L. · Eggplant
HU
1 record
Coronado
TerminatedSolanum lycopersicum L. var. lycopersicum · Tomato
IT
1 record
Deca
Application submittedSolanum lycopersicum L. · Tomato
HU
1 record
Console
ActiveSolanum lycopersicum L. · Tomato
IT
1 record
Esedra
ActiveSolanum lycopersicum L. · Tomato
IT
1 record