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.

Sources10

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

Tomato 1 709 Potato 1 216 Sugar beet 288 Bell pepper 152 Oil radish 143 White mustard 105 hybrids between Solanum lycopersicum L. and S. habrochaites S. Knapp & D.M. Spooner 79 Alfalfa 62 Barley 53 Tomato 48 Soybean 33 Grapevine 32

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.

Amarin

Active

Solanum tuberosum L. · Potato

STET Holland B.V.

7 records

Alaska

Active

Solanum tuberosum L. · Potato

Bretagne-Plants S.C.I.C.A.

7 records

Alanis

Active

Solanum tuberosum L. · Potato

JAN PIETER VAN LOON

7 records

Antonia

Active

Solanum tuberosum L. · Potato

NORIKA| NORIKA Nordring-Kartoffelzucht- und Vermehrungs-GmbH

10 records

Replantpac

Active

Prunus cerasifera x Prunus dulcis

AGROMILLORA IBERIA S.L.U

9 records

Galant

Active

Avena sativa L. · Oat

Lantmaennen ek foer

EE LT SE

7 records

Kora

Active

Fagopyrum esculentum Moench · Buckwheat

Przedsiebiorstwo Hodowlano-Nasienne sp. z o.o.

DE LT PL

6 records

Smart Camilla KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

DK ES SE

4 records

Platus

Protection expired

Solanum lycopersicum L. · Tomato

MONSANTO INVEST N.V.

NL PL SK

4 records

Kawegigamono

Terminated

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

ES FR IT

4 records

Celzus

Protection expired

Solanum lycopersicum L. · Tomato

MONSANTO INVEST N.V.

NL PL SK

4 records

BTS Smart 1645 N

Active

Beta vulgaris Sugar Beet Group · Sugar beet

Betaseed

CZ IT NL

4 records

Smart Manja KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

DE ES

4 records

SV8840TM

Active

Solanum lycopersicum L. · Tomato

Monsanto Vegetable IP Management B.V.

NL UA

7 records

Finley

Active

Solanum lycopersicum L. · Tomato

Shevchenko Igor

BG UA

6 records

Baribine

Active

Solanum lycopersicum L. · Tomato

Syngenta Seeds B.V.

NL UA

4 records

Almonda

Active

Solanum tuberosum L. · Potato

SOLANA GMBH & CO KG

7 records

Yonicole

Terminated

Chrysanthemum L. · Chrysanthemum

Vandenberg Cornelis P

DK IT NL

4 records

Vulcan

Active

Solanum lycopersicum L. · Tomato

Paul Degreef

NL UA

6 records

Sallinia KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

BE DE NL

4 records

Romana

Protection expired

Solanum lycopersicum L. · Tomato

Bayer Holland B.V.

NL PL SK

4 records

Smart Modenta KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

CZ PL UA

5 records

Smart Adiella KWS

Active

Beta vulgaris Sugar Beet Group · Sugar beet

KWS SAAT SE & CO.KGAA

CZ DE ES

4 records

Sahel

Active

Solanum lycopersicum L. · Tomato

SYNGENTA SEEDS B.V.

ES NL PL

4 records

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Pests

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.