Nemo
ActiveSolanum tuberosum L. · Potato
Fobek B.V., Tuberosum Technologies Inc.
NL
6 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.
NEMAGUARD
Activehybrids between Prunus davidiana and Prunus persica
United States Department of Agriculture -USDA-
ES
4 records
N 6410
TerminatedSolanum lycopersicum L. · Tomato
Nunhems B.V.
NL
5 records
Novano
ActiveSolanum tuberosum L. · Potato
Saatzucht Niehoff
NL
5 records
NOS Upstairs
ActiveHordeum vulgare L. · Barley
Nordic Seed A/S
DK
4 records
Nada
ActiveSolanum lycopersicum L. · Tomato
SMEDEKS Co d.o.o
HR
3 records
Nordlicht
ActiveSolanum tuberosum L. · Potato
NORIKA Nordring-Kartoffelzucht-und Vermehrungs-GmbH Gross Luesewitz
DE
4 records
Nevadina
ActiveSolanum tuberosum L. · Potato
Europlant Pflanzenzucht GmbH
DE
5 records
Montezuma
Terminatedhybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
6 records
Moscatel
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
5 records
Miryana
ActiveTriticum aestivum L. · Bread wheat
P. Petkov, S. Petkov, R. Ivanova, P. Savov
BG
3 records
Monteliga
ActiveSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
5 records
N 6428
ActiveSolanum lycopersicum L. · Tomato
Steven Schroeder
NL
4 records
Monika
ActiveSolanum tuberosum L. · Potato
Vesa Velhartice a.s.
CZ
4 records
Myrobalan 29C
ActivePrunus cerasifera Ehrh. · Cherry plum
Marion E. Gregory
UA
4 records
Modya
ActiveSinapis alba L. · White mustard
Semences de France S.A.
FR
4 records
Minoprio
ActiveSolanum lycopersicum L. · Tomato
HM.Clause S.A.S.
NL
4 records
Motril
ActiveSolanum lycopersicum L. · Tomato
SEMILLAS FITO, S.A.
ES
3 records
Meys
ActiveSolanum lycopersicum L. · Tomato
Yuksel Tohumculuk LTD
NL
3 records
Montealto
TerminatedSolanum lycopersicum L. · Tomato
Rijk Zwaan Zaadteelt en Zaadhandel B.V.
NL
4 records
Montague
ActiveSolanum lycopersicum L. · Tomato
Enza Zaden Beheer B.V.
NL
5 records
Merle
ActiveSolanum tuberosum L. · Potato
Saka Pflanzenzucht GmbH Co KG
DE
4 records
Melrose
ActiveSolanum tuberosum L. · Potato
Romagnoli FLLI SpA
IT
5 records
Muley
ActiveCapsicum annuum L. · Bell pepper
Enza Zaden Beheer B.V.
NL
5 records