Cerata KWS
ActiveSolanum tuberosum L. · Potato
STET HOLLAND
NL
14 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.
Caribou Russet
ActiveSolanum tuberosum L. · Potato
University of Maine System Board of Trustees
NL
11 records
Accord
ActiveSolanum tuberosum L. · Potato
C. Meijer
NL
11 records
Allison
ActiveSolanum tuberosum L. · Potato
ROCUS PIETER GRAVELAND
NL
12 records
BTS Smart 2040 N
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
Betaseed
CZ
DE
IT
PL
UA
7 records
Thomas
ActiveSolanum lycopersicum L. · Tomato
Syngenta Seeds B.V.
CZ
ES
FR
NL
PL
SK
9 records
Smart Briga KWS
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KWS Saat SE, Einbeck DE
CZ
DE
HR
HU
IT
UA
8 records
Lisanna KWS
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
BE
DE
DK
ES
NL
SE
7 records
Lorenza
TerminatedBeta vulgaris Sugar Beet Group · Sugar beet
KWS| KWS SAAT AG
BE
DE
ES
FR
LT
7 records
Quarta
ActiveSolanum tuberosum L. · Potato
Kartoffelzucht Böhm Inh. Gebrüder Böhm K.G.
AT
CZ
DE
EE
FR
NL
8 records
Filea
Application submittedSolanum tuberosum L. · Potato
REITZIG| Dorlies Reitzig
CZ
DE
ES
IT
PL
SK
12 records
Lunella KWS
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
BE
DE
DK
ES
FR
SE
8 records
Claustar
ActiveSolanum tuberosum L. · Potato
SOCIETE CLAUSE
ES
FR
GR
IE
LU
NL
8 records
Caprianna KWS
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE & CO.KGAA
BE
DE
DK
FR
NL
SE
7 records
Smart Attala KWS
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE and CO KGAA
DE
DK
LT
SE
UA
8 records
Stemster
ActiveSolanum tuberosum L. · Potato
Dunnet, J.
DK
FR
NL
SE
SK
9 records
Ninak
ActiveLolium multiflorum Lam. · Italian ryegrass
KONINKLIJKE KWEEKBED
DE
NL
PT
12 records
Marijke
ActiveSolanum tuberosum L. · Potato
ZPC Friese Cooperative Haldensvereniging voor Zaaizad en Pootgoed (NL)
DK
HR
IE
IT
NL
7 records
Cactus
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
SESVANDERHAVE NV-SA, BE
CZ
DK
FR
HU
SE
7 records
Daphna
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE and CO KGAA
DE
DK
FR
LT
SE
7 records
Celesta KWS
ActiveBeta vulgaris Sugar Beet Group · Sugar beet
KWS SAAT SE and CO KGAA
DE
DK
FR
LT
SE
7 records
Darwina
TerminatedSolanum tuberosum L. · Potato
U. OLDENBURGER (NL)
DE
DK
FR
NL
SE
10 records
Vlasta
ActiveMedicago sativa L. · Alfalfa
Agrogen spol. s.r.o.
AT
CZ
SK
UA
8 records
Zita
ActiveHordeum vulgare L. · Barley
PAJBJERG A/S
AT
DE
DK
PL
9 records