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.

CarpentiÃ¨re

Active

Solanum tuberosum L. · Potato

INCONNU (FR)

1 record

Botero

Active

Solanum lycopersicum L. var. lycopersicum · Tomato

ISI SEMENTI SPA

1 record

Buffaloflame

Active

Solanum lycopersicum L. · Tomato

HM Clause SA (FR)

1 record

Bolero

Terminated

Tagetes patula L. · French marigold

Hodowla i Nasiennictwo Roślin Ogrodniczych Waganiec sp. z o.o.

1 record

Cabinet F1

Terminated

Solanum lycopersicum L. · Tomato

Sylvain Bontems

1 record

Bon Avida

Application submitted

Solanum lycopersicum L. · Tomato

KWS VEGETABLES B.V.

1 record

Buffalosteack

Active

Solanum lycopersicum L. · Tomato

Clause (FR)

1 record

Blue Tonic

Application submitted

Solanum lycopersicum L. · Tomato

Enza Zaden Beheer B.V.

1 record

Boderin F1

Active

Solanum lycopersicum L. · Tomato

Sylvain Bontems

1 record

Bravet

Application submitted

Solanum lycopersicum L. · Tomato

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

2 records

BIG POWER

Terminated

Solanum lycopersicum L. · Tomato

RIJK ZWAAN Z.Z. B.V.

1 record

Bóbr CEA

Terminated

Solanum tuberosum L. · Potato

Hodowla Ziemniaka i Nasiennictwo Gdańsk sp z o.o.

1 record

Bonarda F1

Terminated

Solanum lycopersicum L. · Tomato

Yonat Partok

1 record

Bagira F1

Terminated

Solanum lycopersicum L. · Tomato

Robert Priieur

2 records

B5415

Application submitted

Beta vulgaris Sugar Beet Group · Sugar beet

Betaseed

1 record

Beril F1

Terminated

Solanum lycopersicum L. · Tomato

Bustin Natan

1 record

Bendix

Withdrawn

Sinapis alba L. · White mustard

INAKTIV SA Carneau Frères Eurogazon

1 record

Belmontyno

Application submitted

Solanum lycopersicum L. · Tomato

Gautier Semences SAS (FR)

1 record

Baraco

Active

Sinapis alba L. · White mustard

Carneau Freres SA (FR)

1 record

Bazaliia

Active

Solanum tuberosum L. · Potato

Oliinyk Tetiana Mykolaivna, Borivs`kyi Anatolii Frantsovych, Furdyha Mykola Mykolaiovych, Abdurahimova Tamara Volodymyrivna, Borzykh Oleksandr Ivanovych, Hunchak Volodymyr Mykhailovych, Tymko Mykola Hryhorovych, Bondarchuk Anatolii Andriiovych, Sydorchuk

2 records

Avatar

Active

Solanum lycopersicum L. var. lycopersicum · Tomato

CORA SEEDS S.R.L

1 record

Balamir

Application submitted

Capsicum annuum L. · Bell pepper

Nunhems B.V.

1 record

Aron

Active

Solanum lycopersicum L. · Tomato

Kees Konst

2 records

Asterix F1

Terminated

Solanum lycopersicum L. · Tomato

2 records

1 2 ... 169 170 171 172 173 174 175 ... 188 189 Next

Jump to page 27 54 72 81 108 135 162 182

Pests

All terms →

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.